./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/20051113-1.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/20051113-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2a43a02844acf962bfa6f77d0e1512c06ac1cc2fb3c3905e584a292a069b5426 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:48:37,402 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:48:37,405 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:48:37,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:48:37,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:48:37,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:48:37,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:48:37,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:48:37,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:48:37,459 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:48:37,460 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:48:37,462 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:48:37,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:48:37,464 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:48:37,465 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:48:37,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:48:37,469 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:48:37,470 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:48:37,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:48:37,477 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:48:37,478 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:48:37,479 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:48:37,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:48:37,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:48:37,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:48:37,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:48:37,489 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:48:37,489 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:48:37,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:48:37,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:48:37,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:48:37,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:48:37,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:48:37,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:48:37,495 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:48:37,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:48:37,496 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:48:37,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:48:37,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:48:37,497 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:48:37,498 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:48:37,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:48:37,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 05:48:37,531 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:48:37,531 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:48:37,532 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:48:37,532 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:48:37,532 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:48:37,533 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:48:37,533 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:48:37,533 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:48:37,533 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:48:37,534 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:48:37,534 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:48:37,535 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:48:37,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:48:37,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:48:37,535 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:48:37,535 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:48:37,536 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:48:37,536 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:48:37,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:48:37,536 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:48:37,537 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:48:37,537 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:48:37,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:48:37,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:48:37,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:48:37,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:48:37,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:48:37,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:48:37,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:48:37,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:48:37,539 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2a43a02844acf962bfa6f77d0e1512c06ac1cc2fb3c3905e584a292a069b5426 [2022-07-23 05:48:37,781 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:48:37,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:48:37,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:48:37,809 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:48:37,810 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:48:37,811 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/20051113-1.i [2022-07-23 05:48:37,868 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef6d57f99/b71f5c43a9f1496088c84dcfe9cad2d5/FLAGa8a4d8375 [2022-07-23 05:48:38,294 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:48:38,294 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/20051113-1.i [2022-07-23 05:48:38,314 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef6d57f99/b71f5c43a9f1496088c84dcfe9cad2d5/FLAGa8a4d8375 [2022-07-23 05:48:38,326 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ef6d57f99/b71f5c43a9f1496088c84dcfe9cad2d5 [2022-07-23 05:48:38,331 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:48:38,332 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:48:38,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:48:38,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:48:38,340 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:48:38,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:48:38" (1/1) ... [2022-07-23 05:48:38,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df06f2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38, skipping insertion in model container [2022-07-23 05:48:38,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:48:38" (1/1) ... [2022-07-23 05:48:38,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:48:38,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:48:38,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:48:38,646 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:48:38,682 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:48:38,704 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:48:38,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38 WrapperNode [2022-07-23 05:48:38,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:48:38,705 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:48:38,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:48:38,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:48:38,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38" (1/1) ... [2022-07-23 05:48:38,737 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38" (1/1) ... [2022-07-23 05:48:38,755 INFO L137 Inliner]: procedures = 125, calls = 23, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 77 [2022-07-23 05:48:38,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:48:38,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:48:38,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:48:38,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:48:38,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38" (1/1) ... [2022-07-23 05:48:38,766 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38" (1/1) ... [2022-07-23 05:48:38,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38" (1/1) ... [2022-07-23 05:48:38,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38" (1/1) ... [2022-07-23 05:48:38,776 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38" (1/1) ... [2022-07-23 05:48:38,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38" (1/1) ... [2022-07-23 05:48:38,781 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38" (1/1) ... [2022-07-23 05:48:38,783 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:48:38,784 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:48:38,784 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:48:38,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:48:38,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38" (1/1) ... [2022-07-23 05:48:38,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:48:38,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:38,809 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 05:48:38,815 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 05:48:38,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 05:48:38,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 05:48:38,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 05:48:38,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 05:48:38,843 INFO L130 BoogieDeclarations]: Found specification of procedure dummy_abort [2022-07-23 05:48:38,843 INFO L138 BoogieDeclarations]: Found implementation of procedure dummy_abort [2022-07-23 05:48:38,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 05:48:38,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:48:38,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:48:38,917 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:48:38,918 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:48:39,133 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:48:39,139 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:48:39,139 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-23 05:48:39,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:48:39 BoogieIcfgContainer [2022-07-23 05:48:39,141 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:48:39,143 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:48:39,143 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:48:39,152 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:48:39,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:48:38" (1/3) ... [2022-07-23 05:48:39,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f51153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:48:39, skipping insertion in model container [2022-07-23 05:48:39,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:48:38" (2/3) ... [2022-07-23 05:48:39,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77f51153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:48:39, skipping insertion in model container [2022-07-23 05:48:39,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:48:39" (3/3) ... [2022-07-23 05:48:39,155 INFO L111 eAbstractionObserver]: Analyzing ICFG 20051113-1.i [2022-07-23 05:48:39,169 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:48:39,170 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 25 error locations. [2022-07-23 05:48:39,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:48:39,231 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@70969a18, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@19bec5e5 [2022-07-23 05:48:39,231 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-07-23 05:48:39,235 INFO L276 IsEmpty]: Start isEmpty. Operand has 64 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 62 states have internal predecessors, (67), 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 05:48:39,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-23 05:48:39,240 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:39,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-23 05:48:39,241 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:39,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:39,247 INFO L85 PathProgramCache]: Analyzing trace with hash 30849, now seen corresponding path program 1 times [2022-07-23 05:48:39,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:39,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706782369] [2022-07-23 05:48:39,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:39,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:39,447 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 05:48:39,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:39,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706782369] [2022-07-23 05:48:39,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706782369] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:39,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:39,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:48:39,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815953433] [2022-07-23 05:48:39,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:39,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:48:39,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:39,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:48:39,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:48:39,488 INFO L87 Difference]: Start difference. First operand has 64 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 62 states have internal predecessors, (67), 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 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:39,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:39,584 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2022-07-23 05:48:39,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:48:39,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-23 05:48:39,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:39,597 INFO L225 Difference]: With dead ends: 63 [2022-07-23 05:48:39,597 INFO L226 Difference]: Without dead ends: 61 [2022-07-23 05:48:39,601 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 05:48:39,605 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 61 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:39,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 40 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:48:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-23 05:48:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-07-23 05:48:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 59 states have internal predecessors, (62), 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 05:48:39,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-07-23 05:48:39,645 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 3 [2022-07-23 05:48:39,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:39,646 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-07-23 05:48:39,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-07-23 05:48:39,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-23 05:48:39,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:39,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-23 05:48:39,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 05:48:39,649 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:39,650 INFO L85 PathProgramCache]: Analyzing trace with hash 956356, now seen corresponding path program 1 times [2022-07-23 05:48:39,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:39,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187238998] [2022-07-23 05:48:39,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:39,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:39,736 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 05:48:39,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:39,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187238998] [2022-07-23 05:48:39,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187238998] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:39,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:39,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:48:39,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554933669] [2022-07-23 05:48:39,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:39,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:48:39,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:39,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:48:39,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:48:39,743 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:39,812 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-07-23 05:48:39,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:48:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-23 05:48:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:39,815 INFO L225 Difference]: With dead ends: 60 [2022-07-23 05:48:39,815 INFO L226 Difference]: Without dead ends: 60 [2022-07-23 05:48:39,818 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 05:48:39,820 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 57 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:39,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 39 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:48:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-23 05:48:39,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-23 05:48:39,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 58 states have internal predecessors, (61), 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 05:48:39,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-07-23 05:48:39,835 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 4 [2022-07-23 05:48:39,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:39,835 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-07-23 05:48:39,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:39,836 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-07-23 05:48:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:48:39,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:39,838 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:39,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 05:48:39,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:39,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1573926710, now seen corresponding path program 1 times [2022-07-23 05:48:39,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:39,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986262359] [2022-07-23 05:48:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:39,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:39,914 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 05:48:39,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:39,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986262359] [2022-07-23 05:48:39,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986262359] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:39,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:39,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:48:39,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769722370] [2022-07-23 05:48:39,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:39,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:48:39,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:39,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:48:39,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:48:39,917 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 05:48:39,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:39,982 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2022-07-23 05:48:39,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:48:39,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 05:48:39,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:39,984 INFO L225 Difference]: With dead ends: 53 [2022-07-23 05:48:39,984 INFO L226 Difference]: Without dead ends: 53 [2022-07-23 05:48:39,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 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 05:48:39,989 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 98 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:39,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 32 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:48:39,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-23 05:48:39,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-23 05:48:39,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 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 05:48:40,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-07-23 05:48:40,001 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 7 [2022-07-23 05:48:40,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:40,001 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-07-23 05:48:40,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 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 05:48:40,001 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-07-23 05:48:40,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:48:40,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:40,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:40,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 05:48:40,003 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:40,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:40,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1573926709, now seen corresponding path program 1 times [2022-07-23 05:48:40,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:40,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106969134] [2022-07-23 05:48:40,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:40,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:40,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:40,075 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 05:48:40,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:40,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106969134] [2022-07-23 05:48:40,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106969134] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:40,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:40,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:48:40,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896751638] [2022-07-23 05:48:40,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:40,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:48:40,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:40,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:48:40,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:48:40,078 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 3 states, 2 states have (on average 3.5) 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 05:48:40,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:40,117 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-07-23 05:48:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:48:40,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) 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 05:48:40,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:40,118 INFO L225 Difference]: With dead ends: 46 [2022-07-23 05:48:40,119 INFO L226 Difference]: Without dead ends: 46 [2022-07-23 05:48:40,119 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 05:48:40,120 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:40,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:48:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-23 05:48:40,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-23 05:48:40,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 44 states have internal predecessors, (47), 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 05:48:40,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-07-23 05:48:40,124 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 7 [2022-07-23 05:48:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:40,124 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-07-23 05:48:40,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) 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 05:48:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-07-23 05:48:40,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:48:40,125 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:40,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:40,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 05:48:40,126 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:40,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:40,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1365553495, now seen corresponding path program 1 times [2022-07-23 05:48:40,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:40,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835267405] [2022-07-23 05:48:40,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:40,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:40,210 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 05:48:40,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:40,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835267405] [2022-07-23 05:48:40,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835267405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:40,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:40,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:48:40,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421355830] [2022-07-23 05:48:40,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:40,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:48:40,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:40,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:48:40,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:48:40,214 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:40,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:40,287 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-07-23 05:48:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:48:40,287 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 05:48:40,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:40,290 INFO L225 Difference]: With dead ends: 44 [2022-07-23 05:48:40,290 INFO L226 Difference]: Without dead ends: 44 [2022-07-23 05:48:40,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:48:40,291 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 72 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:40,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 35 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:48:40,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-23 05:48:40,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-23 05:48:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 42 states have internal predecessors, (45), 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 05:48:40,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-07-23 05:48:40,299 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 15 [2022-07-23 05:48:40,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:40,300 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-07-23 05:48:40,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-07-23 05:48:40,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-23 05:48:40,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:40,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:40,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 05:48:40,305 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:40,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1365553496, now seen corresponding path program 1 times [2022-07-23 05:48:40,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:40,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366889468] [2022-07-23 05:48:40,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:40,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:40,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:40,406 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 05:48:40,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:40,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366889468] [2022-07-23 05:48:40,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366889468] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:40,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:40,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:48:40,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404186062] [2022-07-23 05:48:40,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:40,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:48:40,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:40,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:48:40,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:48:40,409 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:40,452 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-07-23 05:48:40,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:48:40,453 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-07-23 05:48:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:40,453 INFO L225 Difference]: With dead ends: 43 [2022-07-23 05:48:40,454 INFO L226 Difference]: Without dead ends: 43 [2022-07-23 05:48:40,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:48:40,455 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:40,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 38 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:48:40,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-23 05:48:40,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-07-23 05:48:40,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 41 states have internal predecessors, (44), 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 05:48:40,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-07-23 05:48:40,459 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 15 [2022-07-23 05:48:40,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:40,459 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-07-23 05:48:40,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:40,460 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-07-23 05:48:40,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-23 05:48:40,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:40,460 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 05:48:40,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-23 05:48:40,461 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:40,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:40,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1963083303, now seen corresponding path program 1 times [2022-07-23 05:48:40,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:40,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702002789] [2022-07-23 05:48:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:40,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:40,527 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 05:48:40,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:40,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702002789] [2022-07-23 05:48:40,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702002789] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:40,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:40,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:48:40,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565658227] [2022-07-23 05:48:40,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:40,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:48:40,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:40,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:48:40,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:48:40,530 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:40,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:40,595 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2022-07-23 05:48:40,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:48:40,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-23 05:48:40,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:40,596 INFO L225 Difference]: With dead ends: 69 [2022-07-23 05:48:40,596 INFO L226 Difference]: Without dead ends: 69 [2022-07-23 05:48:40,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:48:40,597 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 76 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:40,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 54 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:48:40,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-23 05:48:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2022-07-23 05:48:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 44 states have internal predecessors, (48), 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 05:48:40,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-07-23 05:48:40,604 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 17 [2022-07-23 05:48:40,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:40,604 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-07-23 05:48:40,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:48:40,604 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-07-23 05:48:40,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:48:40,605 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:40,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:40,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-23 05:48:40,606 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:40,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:40,606 INFO L85 PathProgramCache]: Analyzing trace with hash -58695891, now seen corresponding path program 1 times [2022-07-23 05:48:40,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:40,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409999757] [2022-07-23 05:48:40,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:40,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:40,652 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 05:48:40,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:40,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409999757] [2022-07-23 05:48:40,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409999757] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:40,653 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:40,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:48:40,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199896508] [2022-07-23 05:48:40,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:40,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:48:40,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:40,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:48:40,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:48:40,655 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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 05:48:40,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:40,722 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-07-23 05:48:40,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:48:40,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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 21 [2022-07-23 05:48:40,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:40,723 INFO L225 Difference]: With dead ends: 44 [2022-07-23 05:48:40,723 INFO L226 Difference]: Without dead ends: 44 [2022-07-23 05:48:40,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 05:48:40,726 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:40,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 47 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:48:40,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-23 05:48:40,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-23 05:48:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 42 states have internal predecessors, (46), 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 05:48:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2022-07-23 05:48:40,744 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 21 [2022-07-23 05:48:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:40,744 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2022-07-23 05:48:40,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.25) internal successors, (21), 5 states have internal predecessors, (21), 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 05:48:40,745 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2022-07-23 05:48:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-23 05:48:40,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:40,746 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 05:48:40,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-23 05:48:40,749 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:40,750 INFO L85 PathProgramCache]: Analyzing trace with hash -58695890, now seen corresponding path program 1 times [2022-07-23 05:48:40,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:40,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815253225] [2022-07-23 05:48:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:40,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:40,827 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 05:48:40,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:40,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815253225] [2022-07-23 05:48:40,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815253225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:40,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:40,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:48:40,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294843081] [2022-07-23 05:48:40,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:40,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:48:40,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:40,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:48:40,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:48:40,829 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 05:48:40,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:40,857 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2022-07-23 05:48:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:48:40,858 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 21 [2022-07-23 05:48:40,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:40,859 INFO L225 Difference]: With dead ends: 64 [2022-07-23 05:48:40,859 INFO L226 Difference]: Without dead ends: 64 [2022-07-23 05:48:40,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 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 05:48:40,860 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 35 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:40,860 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 171 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:48:40,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-23 05:48:40,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 47. [2022-07-23 05:48:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 40 states have (on average 1.225) internal successors, (49), 45 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 05:48:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2022-07-23 05:48:40,863 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 21 [2022-07-23 05:48:40,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:40,863 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2022-07-23 05:48:40,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 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 05:48:40,864 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2022-07-23 05:48:40,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 05:48:40,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:40,865 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] [2022-07-23 05:48:40,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-23 05:48:40,865 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:40,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:40,865 INFO L85 PathProgramCache]: Analyzing trace with hash -309999949, now seen corresponding path program 1 times [2022-07-23 05:48:40,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:40,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397657980] [2022-07-23 05:48:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:40,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:40,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:40,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:40,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397657980] [2022-07-23 05:48:40,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397657980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:40,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467272953] [2022-07-23 05:48:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:40,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:40,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:40,951 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 05:48:40,971 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 05:48:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:41,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 05:48:41,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:41,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:41,400 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:48:41,400 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 13 treesize of output 17 [2022-07-23 05:48:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:41,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467272953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:41,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:48:41,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 13 [2022-07-23 05:48:41,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111876611] [2022-07-23 05:48:41,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:41,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:48:41,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:41,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:48:41,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:48:41,460 INFO L87 Difference]: Start difference. First operand 47 states and 53 transitions. Second operand has 14 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 14 states have internal predecessors, (61), 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 05:48:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:41,754 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2022-07-23 05:48:41,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:48:41,755 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-23 05:48:41,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:41,756 INFO L225 Difference]: With dead ends: 111 [2022-07-23 05:48:41,756 INFO L226 Difference]: Without dead ends: 111 [2022-07-23 05:48:41,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:48:41,757 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 422 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:41,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 148 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:48:41,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-23 05:48:41,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 57. [2022-07-23 05:48:41,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.22) internal successors, (61), 55 states have internal predecessors, (61), 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 05:48:41,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-07-23 05:48:41,778 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 22 [2022-07-23 05:48:41,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:41,780 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-07-23 05:48:41,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 14 states have internal predecessors, (61), 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 05:48:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-07-23 05:48:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-23 05:48:41,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:41,782 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] [2022-07-23 05:48:41,810 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 05:48:42,009 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,SelfDestructingSolverStorable9 [2022-07-23 05:48:42,010 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:42,011 INFO L85 PathProgramCache]: Analyzing trace with hash -612311662, now seen corresponding path program 1 times [2022-07-23 05:48:42,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:42,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342186307] [2022-07-23 05:48:42,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:42,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:42,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-23 05:48:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:42,087 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 05:48:42,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:42,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342186307] [2022-07-23 05:48:42,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342186307] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:42,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:42,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:48:42,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650275009] [2022-07-23 05:48:42,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:42,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:48:42,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:42,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:48:42,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:48:42,091 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 05:48:42,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:42,131 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2022-07-23 05:48:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:48:42,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-07-23 05:48:42,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:42,133 INFO L225 Difference]: With dead ends: 56 [2022-07-23 05:48:42,133 INFO L226 Difference]: Without dead ends: 56 [2022-07-23 05:48:42,133 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 05:48:42,134 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 32 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:42,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 44 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:48:42,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-23 05:48:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-07-23 05:48:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.2) internal successors, (60), 54 states have internal predecessors, (60), 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 05:48:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-07-23 05:48:42,137 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 24 [2022-07-23 05:48:42,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:42,137 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-07-23 05:48:42,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.333333333333333) internal successors, (22), 4 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-23 05:48:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-07-23 05:48:42,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 05:48:42,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:42,139 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 05:48:42,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-23 05:48:42,139 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:42,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:42,140 INFO L85 PathProgramCache]: Analyzing trace with hash -20987021, now seen corresponding path program 1 times [2022-07-23 05:48:42,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:42,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96838469] [2022-07-23 05:48:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:42,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:42,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-23 05:48:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:42,206 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 05:48:42,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:42,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96838469] [2022-07-23 05:48:42,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96838469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:42,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:42,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:48:42,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166527960] [2022-07-23 05:48:42,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:42,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:48:42,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:42,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:48:42,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:48:42,209 INFO L87 Difference]: Start difference. First operand 56 states and 64 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 05:48:42,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:42,255 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2022-07-23 05:48:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:48:42,256 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 05:48:42,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:42,257 INFO L225 Difference]: With dead ends: 68 [2022-07-23 05:48:42,257 INFO L226 Difference]: Without dead ends: 68 [2022-07-23 05:48:42,257 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 05:48:42,258 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:42,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 49 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:48:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-23 05:48:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2022-07-23 05:48:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 57 states have internal predecessors, (64), 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 05:48:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2022-07-23 05:48:42,261 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 26 [2022-07-23 05:48:42,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:42,261 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2022-07-23 05:48:42,262 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 05:48:42,262 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2022-07-23 05:48:42,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 05:48:42,263 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:42,263 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 05:48:42,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-23 05:48:42,263 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:42,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1184799620, now seen corresponding path program 1 times [2022-07-23 05:48:42,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:42,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901437669] [2022-07-23 05:48:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:42,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:42,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-23 05:48:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:42,323 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 05:48:42,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:42,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901437669] [2022-07-23 05:48:42,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901437669] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:42,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:42,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:48:42,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685933395] [2022-07-23 05:48:42,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:42,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:48:42,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:42,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:48:42,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:48:42,327 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 05:48:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:42,350 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-07-23 05:48:42,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:48:42,351 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 05:48:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:42,352 INFO L225 Difference]: With dead ends: 67 [2022-07-23 05:48:42,352 INFO L226 Difference]: Without dead ends: 67 [2022-07-23 05:48:42,352 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 05:48:42,353 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:42,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 169 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:48:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-23 05:48:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2022-07-23 05:48:42,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 60 states have internal predecessors, (67), 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 05:48:42,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-07-23 05:48:42,356 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 30 [2022-07-23 05:48:42,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:42,358 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-07-23 05:48:42,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 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 05:48:42,358 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-07-23 05:48:42,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-23 05:48:42,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:42,360 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] [2022-07-23 05:48:42,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-23 05:48:42,361 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:42,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:42,361 INFO L85 PathProgramCache]: Analyzing trace with hash -416344648, now seen corresponding path program 1 times [2022-07-23 05:48:42,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:42,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818748614] [2022-07-23 05:48:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:42,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:42,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-23 05:48:42,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:48:42,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:42,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818748614] [2022-07-23 05:48:42,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818748614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:42,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:42,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 05:48:42,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636431871] [2022-07-23 05:48:42,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:42,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:48:42,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:42,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:48:42,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:48:42,488 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) 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 05:48:42,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:42,617 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-07-23 05:48:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:48:42,617 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) 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 05:48:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:42,618 INFO L225 Difference]: With dead ends: 73 [2022-07-23 05:48:42,618 INFO L226 Difference]: Without dead ends: 73 [2022-07-23 05:48:42,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:48:42,619 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 22 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:42,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 175 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:48:42,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-23 05:48:42,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 66. [2022-07-23 05:48:42,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 63 states have internal predecessors, (70), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-23 05:48:42,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2022-07-23 05:48:42,622 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 31 [2022-07-23 05:48:42,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:42,622 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2022-07-23 05:48:42,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) 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 05:48:42,623 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2022-07-23 05:48:42,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 05:48:42,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:42,624 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:42,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-23 05:48:42,624 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:42,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:42,625 INFO L85 PathProgramCache]: Analyzing trace with hash 241915192, now seen corresponding path program 1 times [2022-07-23 05:48:42,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:42,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005829356] [2022-07-23 05:48:42,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:42,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:42,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-23 05:48:42,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:42,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-07-23 05:48:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:48:42,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:42,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005829356] [2022-07-23 05:48:42,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005829356] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:42,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:48:42,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:48:42,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216145577] [2022-07-23 05:48:42,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:42,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:48:42,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:48:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:48:42,690 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 05:48:42,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:42,751 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2022-07-23 05:48:42,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:48:42,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 33 [2022-07-23 05:48:42,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:42,752 INFO L225 Difference]: With dead ends: 65 [2022-07-23 05:48:42,753 INFO L226 Difference]: Without dead ends: 58 [2022-07-23 05:48:42,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 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 05:48:42,753 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 24 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:42,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:48:42,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-23 05:48:42,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2022-07-23 05:48:42,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.18) internal successors, (59), 54 states have internal predecessors, (59), 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 05:48:42,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2022-07-23 05:48:42,756 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 33 [2022-07-23 05:48:42,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:42,756 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2022-07-23 05:48:42,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 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 05:48:42,757 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2022-07-23 05:48:42,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-23 05:48:42,757 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:42,758 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:42,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-23 05:48:42,758 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:42,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:42,758 INFO L85 PathProgramCache]: Analyzing trace with hash 701429363, now seen corresponding path program 2 times [2022-07-23 05:48:42,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:42,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406325039] [2022-07-23 05:48:42,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:42,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:48:42,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:42,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406325039] [2022-07-23 05:48:42,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406325039] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:42,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064706967] [2022-07-23 05:48:42,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:48:42,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:42,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:42,853 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 05:48:42,855 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 05:48:42,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-23 05:48:42,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:48:42,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-23 05:48:42,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:42,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-23 05:48:42,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:48:42,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064706967] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:48:42,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:48:42,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2022-07-23 05:48:42,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665881350] [2022-07-23 05:48:42,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:48:42,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:48:42,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:48:42,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:48:42,960 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 05:48:42,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:42,970 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-07-23 05:48:42,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:48:42,970 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-23 05:48:42,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:42,971 INFO L225 Difference]: With dead ends: 57 [2022-07-23 05:48:42,971 INFO L226 Difference]: Without dead ends: 57 [2022-07-23 05:48:42,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:48:42,972 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 37 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:42,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 81 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:48:42,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-23 05:48:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-23 05:48:42,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 55 states have internal predecessors, (60), 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 05:48:42,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-07-23 05:48:42,975 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 32 [2022-07-23 05:48:42,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:42,975 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-07-23 05:48:42,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 05:48:42,975 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-07-23 05:48:42,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 05:48:42,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:42,978 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:43,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 05:48:43,199 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,SelfDestructingSolverStorable15 [2022-07-23 05:48:43,199 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:43,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:43,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1203352596, now seen corresponding path program 1 times [2022-07-23 05:48:43,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:43,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981334341] [2022-07-23 05:48:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:43,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:48:43,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:43,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981334341] [2022-07-23 05:48:43,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981334341] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:43,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202699258] [2022-07-23 05:48:43,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:43,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:43,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:43,316 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 05:48:43,323 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 05:48:43,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:43,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 05:48:43,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:43,434 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 11 treesize of output 7 [2022-07-23 05:48:43,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:48:43,456 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 21 treesize of output 20 [2022-07-23 05:48:43,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:48:43,469 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 21 treesize of output 20 [2022-07-23 05:48:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:48:43,484 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 21 treesize of output 20 [2022-07-23 05:48:43,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:48:43,501 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 21 treesize of output 20 [2022-07-23 05:48:43,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:48:43,514 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 21 treesize of output 20 [2022-07-23 05:48:43,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:48:43,524 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 21 treesize of output 20 [2022-07-23 05:48:43,657 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 15 treesize of output 7 [2022-07-23 05:48:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:48:43,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:43,741 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:48:43,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202699258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:43,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:48:43,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2022-07-23 05:48:43,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514972534] [2022-07-23 05:48:43,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:43,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 05:48:43,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:43,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 05:48:43,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:48:43,744 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 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 05:48:44,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:44,054 INFO L93 Difference]: Finished difference Result 97 states and 111 transitions. [2022-07-23 05:48:44,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:48:44,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-23 05:48:44,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:44,056 INFO L225 Difference]: With dead ends: 97 [2022-07-23 05:48:44,056 INFO L226 Difference]: Without dead ends: 97 [2022-07-23 05:48:44,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:48:44,057 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 123 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:44,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 401 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:48:44,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-23 05:48:44,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2022-07-23 05:48:44,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.14) internal successors, (57), 53 states have internal predecessors, (57), 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 05:48:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-07-23 05:48:44,060 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 33 [2022-07-23 05:48:44,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:44,065 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-07-23 05:48:44,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.117647058823529) internal successors, (70), 17 states have internal predecessors, (70), 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 05:48:44,066 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-07-23 05:48:44,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-23 05:48:44,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:44,067 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] [2022-07-23 05:48:44,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:48:44,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:44,291 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:44,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:44,291 INFO L85 PathProgramCache]: Analyzing trace with hash -149943807, now seen corresponding path program 1 times [2022-07-23 05:48:44,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:44,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674250429] [2022-07-23 05:48:44,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:44,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:44,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-23 05:48:44,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674250429] [2022-07-23 05:48:44,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674250429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705979583] [2022-07-23 05:48:44,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:44,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:44,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:44,438 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 05:48:44,439 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 05:48:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:44,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 05:48:44,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:44,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 05:48:44,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:44,850 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:48:44,851 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 13 treesize of output 17 [2022-07-23 05:48:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 05:48:44,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705979583] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:44,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:48:44,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2022-07-23 05:48:44,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966959563] [2022-07-23 05:48:44,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:44,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 05:48:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:44,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 05:48:44,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:48:44,896 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 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 05:48:45,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:45,240 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-07-23 05:48:45,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 05:48:45,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-23 05:48:45,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:45,242 INFO L225 Difference]: With dead ends: 79 [2022-07-23 05:48:45,242 INFO L226 Difference]: Without dead ends: 79 [2022-07-23 05:48:45,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2022-07-23 05:48:45,243 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 185 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:45,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 126 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:48:45,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-23 05:48:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2022-07-23 05:48:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 63 states have internal predecessors, (68), 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 05:48:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2022-07-23 05:48:45,246 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 34 [2022-07-23 05:48:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:45,246 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2022-07-23 05:48:45,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.333333333333333) internal successors, (96), 18 states have internal predecessors, (96), 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 05:48:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2022-07-23 05:48:45,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-23 05:48:45,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:45,247 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2022-07-23 05:48:45,273 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 05:48:45,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-23 05:48:45,447 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:45,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1336889422, now seen corresponding path program 1 times [2022-07-23 05:48:45,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:45,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862494342] [2022-07-23 05:48:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:45,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:45,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-23 05:48:45,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:45,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862494342] [2022-07-23 05:48:45,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862494342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:45,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508943861] [2022-07-23 05:48:45,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:45,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:45,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:45,532 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 05:48:45,558 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 05:48:45,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-23 05:48:45,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:45,647 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 6 treesize of output 5 [2022-07-23 05:48:45,834 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 15 treesize of output 7 [2022-07-23 05:48:45,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:48:45,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:48:45,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508943861] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:45,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:48:45,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 24 [2022-07-23 05:48:45,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085522869] [2022-07-23 05:48:45,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:45,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:48:45,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:45,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:48:45,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-07-23 05:48:45,981 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 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 05:48:46,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:46,500 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2022-07-23 05:48:46,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 05:48:46,501 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 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 43 [2022-07-23 05:48:46,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:46,501 INFO L225 Difference]: With dead ends: 65 [2022-07-23 05:48:46,501 INFO L226 Difference]: Without dead ends: 65 [2022-07-23 05:48:46,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=293, Invalid=1039, Unknown=0, NotChecked=0, Total=1332 [2022-07-23 05:48:46,502 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 145 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:46,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 219 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:48:46,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-23 05:48:46,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-23 05:48:46,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.1) internal successors, (66), 63 states have internal predecessors, (66), 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 05:48:46,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2022-07-23 05:48:46,505 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 43 [2022-07-23 05:48:46,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:46,505 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2022-07-23 05:48:46,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.583333333333333) internal successors, (110), 24 states have internal predecessors, (110), 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 05:48:46,505 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2022-07-23 05:48:46,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-23 05:48:46,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:46,506 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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] [2022-07-23 05:48:46,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 05:48:46,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:46,716 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:46,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:46,716 INFO L85 PathProgramCache]: Analyzing trace with hash -990509317, now seen corresponding path program 2 times [2022-07-23 05:48:46,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:46,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028471366] [2022-07-23 05:48:46,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:46,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:46,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-23 05:48:46,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:46,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028471366] [2022-07-23 05:48:46,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028471366] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:46,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576209139] [2022-07-23 05:48:46,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:48:46,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:46,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:46,892 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 05:48:46,892 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 05:48:46,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:48:46,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:48:46,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 05:48:46,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:47,019 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 6 treesize of output 5 [2022-07-23 05:48:47,326 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 15 treesize of output 7 [2022-07-23 05:48:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:48:47,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:47,531 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:48:47,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576209139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:47,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:48:47,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 27 [2022-07-23 05:48:47,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984705269] [2022-07-23 05:48:47,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:47,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-23 05:48:47,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:47,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-23 05:48:47,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=577, Unknown=0, NotChecked=0, Total=702 [2022-07-23 05:48:47,534 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 27 states have internal predecessors, (122), 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 05:48:48,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:48,047 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-07-23 05:48:48,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:48:48,048 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 27 states have internal predecessors, (122), 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 53 [2022-07-23 05:48:48,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:48,048 INFO L225 Difference]: With dead ends: 67 [2022-07-23 05:48:48,048 INFO L226 Difference]: Without dead ends: 67 [2022-07-23 05:48:48,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2022-07-23 05:48:48,050 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 158 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:48,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 182 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:48:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-23 05:48:48,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2022-07-23 05:48:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 63 states have internal predecessors, (65), 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 05:48:48,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-07-23 05:48:48,052 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 53 [2022-07-23 05:48:48,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:48,053 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-07-23 05:48:48,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.518518518518518) internal successors, (122), 27 states have internal predecessors, (122), 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 05:48:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-07-23 05:48:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-23 05:48:48,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:48,054 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:48:48,072 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 05:48:48,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:48,260 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:48,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:48,260 INFO L85 PathProgramCache]: Analyzing trace with hash 868555041, now seen corresponding path program 2 times [2022-07-23 05:48:48,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:48,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657977099] [2022-07-23 05:48:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:48,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:48,459 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:48:48,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:48,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657977099] [2022-07-23 05:48:48,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657977099] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:48,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181818371] [2022-07-23 05:48:48,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:48:48,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:48,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:48,461 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 05:48:48,462 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 05:48:48,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:48:48,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:48:48,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-23 05:48:48,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:48,581 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 11 treesize of output 7 [2022-07-23 05:48:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:48:48,608 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 21 treesize of output 20 [2022-07-23 05:48:48,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:48:48,614 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 21 treesize of output 20 [2022-07-23 05:48:48,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:48:48,627 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 21 treesize of output 20 [2022-07-23 05:48:48,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:48:48,641 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 21 treesize of output 20 [2022-07-23 05:48:48,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:48:48,649 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 21 treesize of output 20 [2022-07-23 05:48:48,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:48:48,656 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 21 treesize of output 20 [2022-07-23 05:48:48,870 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 15 treesize of output 7 [2022-07-23 05:48:48,888 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-23 05:48:48,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:48,971 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-23 05:48:48,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181818371] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:48,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:48:48,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 8] total 23 [2022-07-23 05:48:48,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509581841] [2022-07-23 05:48:48,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:48,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 05:48:48,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:48,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 05:48:48,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:48:48,974 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 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 05:48:49,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:49,392 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2022-07-23 05:48:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-23 05:48:49,392 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 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 54 [2022-07-23 05:48:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:49,393 INFO L225 Difference]: With dead ends: 63 [2022-07-23 05:48:49,393 INFO L226 Difference]: Without dead ends: 63 [2022-07-23 05:48:49,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=266, Invalid=1140, Unknown=0, NotChecked=0, Total=1406 [2022-07-23 05:48:49,394 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 101 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:49,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 258 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:48:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-23 05:48:49,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-23 05:48:49,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 61 states have internal predecessors, (62), 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 05:48:49,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-07-23 05:48:49,397 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 54 [2022-07-23 05:48:49,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:49,397 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-07-23 05:48:49,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.0) internal successors, (115), 23 states have internal predecessors, (115), 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 05:48:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-07-23 05:48:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-23 05:48:49,398 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:49,398 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 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 05:48:49,418 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 05:48:49,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:49,599 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:49,600 INFO L85 PathProgramCache]: Analyzing trace with hash 679832114, now seen corresponding path program 3 times [2022-07-23 05:48:49,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:49,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239285296] [2022-07-23 05:48:49,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:49,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:48:49,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:49,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239285296] [2022-07-23 05:48:49,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239285296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:49,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238642585] [2022-07-23 05:48:49,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:48:49,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:49,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:49,683 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 05:48:49,684 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 05:48:49,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-23 05:48:49,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:48:49,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-23 05:48:49,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:48:49,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:48:49,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238642585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:49,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:48:49,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-23 05:48:49,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230998985] [2022-07-23 05:48:49,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:49,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:48:49,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:49,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:48:49,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:48:49,950 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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 05:48:50,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:50,000 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-07-23 05:48:50,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:48:50,001 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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 58 [2022-07-23 05:48:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:50,001 INFO L225 Difference]: With dead ends: 66 [2022-07-23 05:48:50,001 INFO L226 Difference]: Without dead ends: 66 [2022-07-23 05:48:50,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:48:50,002 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 35 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:50,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 122 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:48:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-23 05:48:50,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-23 05:48:50,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 64 states have internal predecessors, (65), 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 05:48:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-07-23 05:48:50,004 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 58 [2022-07-23 05:48:50,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:50,005 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-07-23 05:48:50,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 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 05:48:50,005 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-07-23 05:48:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-23 05:48:50,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:50,005 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 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 05:48:50,032 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 05:48:50,206 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,SelfDestructingSolverStorable21 [2022-07-23 05:48:50,206 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:50,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:50,207 INFO L85 PathProgramCache]: Analyzing trace with hash -220059533, now seen corresponding path program 4 times [2022-07-23 05:48:50,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:50,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181739264] [2022-07-23 05:48:50,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:50,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:50,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:48:50,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:50,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181739264] [2022-07-23 05:48:50,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181739264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:50,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766789797] [2022-07-23 05:48:50,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:48:50,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:50,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:50,313 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 05:48:50,343 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 05:48:50,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:48:50,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:48:50,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-23 05:48:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:50,800 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:48:50,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:48:50,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766789797] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:50,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:48:50,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-07-23 05:48:50,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448223944] [2022-07-23 05:48:50,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:50,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 05:48:50,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:50,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 05:48:50,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:48:50,941 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 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 05:48:51,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:48:51,310 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-07-23 05:48:51,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:48:51,311 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 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 61 [2022-07-23 05:48:51,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:48:51,311 INFO L225 Difference]: With dead ends: 72 [2022-07-23 05:48:51,312 INFO L226 Difference]: Without dead ends: 72 [2022-07-23 05:48:51,312 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:48:51,313 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 35 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:48:51,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 270 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:48:51,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-23 05:48:51,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-07-23 05:48:51,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 70 states have internal predecessors, (71), 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 05:48:51,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-07-23 05:48:51,315 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 61 [2022-07-23 05:48:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:48:51,315 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-07-23 05:48:51,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 18 states have internal predecessors, (52), 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 05:48:51,315 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-07-23 05:48:51,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-23 05:48:51,316 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:48:51,316 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 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 05:48:51,344 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 05:48:51,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:51,531 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:48:51,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:48:51,532 INFO L85 PathProgramCache]: Analyzing trace with hash -179470317, now seen corresponding path program 5 times [2022-07-23 05:48:51,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:48:51,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088013368] [2022-07-23 05:48:51,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:48:51,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:48:51,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:48:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:48:51,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:48:51,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088013368] [2022-07-23 05:48:51,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088013368] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:48:51,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162223479] [2022-07-23 05:48:51,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:48:51,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:48:51,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:48:51,760 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 05:48:51,768 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 05:48:52,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-23 05:48:52,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:48:52,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-23 05:48:52,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:48:52,482 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:48:52,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:48:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:48:53,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162223479] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:48:53,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:48:53,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 36 [2022-07-23 05:48:53,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667636964] [2022-07-23 05:48:53,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:48:53,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-23 05:48:53,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:48:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-23 05:48:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2022-07-23 05:48:53,184 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 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 05:49:12,420 WARN L233 SmtUtils]: Spent 9.15s on a formula simplification. DAG size of input: 70 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 05:49:12,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:49:12,809 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2022-07-23 05:49:12,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-23 05:49:12,810 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 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 67 [2022-07-23 05:49:12,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:49:12,810 INFO L225 Difference]: With dead ends: 84 [2022-07-23 05:49:12,810 INFO L226 Difference]: Without dead ends: 84 [2022-07-23 05:49:12,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=674, Invalid=1582, Unknown=0, NotChecked=0, Total=2256 [2022-07-23 05:49:12,812 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 390 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:49:12,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 262 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 05:49:12,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-23 05:49:12,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-07-23 05:49:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 80 states have (on average 1.0375) internal successors, (83), 82 states have internal predecessors, (83), 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 05:49:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-07-23 05:49:12,815 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 67 [2022-07-23 05:49:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:49:12,815 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-07-23 05:49:12,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9444444444444444) internal successors, (70), 36 states have internal predecessors, (70), 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 05:49:12,815 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-07-23 05:49:12,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-23 05:49:12,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:49:12,816 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 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 05:49:12,829 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 05:49:13,017 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,SelfDestructingSolverStorable23 [2022-07-23 05:49:13,017 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:49:13,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:49:13,017 INFO L85 PathProgramCache]: Analyzing trace with hash -595228845, now seen corresponding path program 6 times [2022-07-23 05:49:13,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:49:13,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081798020] [2022-07-23 05:49:13,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:49:13,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:49:13,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:49:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:49:13,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:49:13,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081798020] [2022-07-23 05:49:13,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081798020] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:49:13,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738852303] [2022-07-23 05:49:13,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:49:13,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:49:13,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:49:13,706 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 05:49:13,707 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 05:49:23,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-23 05:49:23,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:49:23,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-23 05:49:23,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:49:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:49:23,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:49:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:49:24,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738852303] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:49:24,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:49:24,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 72 [2022-07-23 05:49:24,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050322262] [2022-07-23 05:49:24,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:49:24,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-23 05:49:24,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:49:24,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-23 05:49:24,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1310, Invalid=3802, Unknown=0, NotChecked=0, Total=5112 [2022-07-23 05:49:24,994 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 72 states, 72 states have (on average 1.4722222222222223) internal successors, (106), 72 states have internal predecessors, (106), 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 05:51:52,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:51:52,015 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2022-07-23 05:51:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-23 05:51:52,015 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4722222222222223) internal successors, (106), 72 states have internal predecessors, (106), 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 79 [2022-07-23 05:51:52,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:51:52,016 INFO L225 Difference]: With dead ends: 108 [2022-07-23 05:51:52,016 INFO L226 Difference]: Without dead ends: 108 [2022-07-23 05:51:52,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2140 ImplicationChecksByTransitivity, 148.5s TimeCoverageRelationStatistics Valid=2460, Invalid=6470, Unknown=0, NotChecked=0, Total=8930 [2022-07-23 05:51:52,019 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 70 mSDsluCounter, 1040 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 1213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:51:52,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 1080 Invalid, 1213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-23 05:51:52,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-23 05:51:52,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-07-23 05:51:52,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 106 states have internal predecessors, (107), 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 05:51:52,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-07-23 05:51:52,022 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 79 [2022-07-23 05:51:52,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:51:52,022 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-07-23 05:51:52,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4722222222222223) internal successors, (106), 72 states have internal predecessors, (106), 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 05:51:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-07-23 05:51:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-23 05:51:52,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:51:52,023 INFO L195 NwaCegarLoop]: trace histogram [46, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 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 05:51:52,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-23 05:51:52,223 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,SelfDestructingSolverStorable24 [2022-07-23 05:51:52,224 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-07-23 05:51:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:51:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash 51574227, now seen corresponding path program 7 times [2022-07-23 05:51:52,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:51:52,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137743151] [2022-07-23 05:51:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:51:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:51:52,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:53,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:51:53,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:51:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137743151] [2022-07-23 05:51:53,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137743151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:51:53,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051200252] [2022-07-23 05:51:53,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:51:53,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:51:53,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:51:53,832 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 05:51:53,832 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 05:51:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:51:54,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-23 05:51:54,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:51:57,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:51:57,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:52:01,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-23 05:52:01,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051200252] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:52:01,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:52:01,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 144 [2022-07-23 05:52:01,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854516495] [2022-07-23 05:52:01,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:52:01,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-07-23 05:52:01,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:52:01,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-07-23 05:52:01,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4934, Invalid=15658, Unknown=0, NotChecked=0, Total=20592 [2022-07-23 05:52:01,595 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 144 states, 144 states have (on average 1.2361111111111112) internal successors, (178), 144 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)