./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-ext-properties/test-0217_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e8d55036 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/list-ext-properties/test-0217_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 e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 22:03:34,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 22:03:34,334 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 22:03:34,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 22:03:34,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 22:03:34,376 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 22:03:34,378 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 22:03:34,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 22:03:34,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 22:03:34,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 22:03:34,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 22:03:34,392 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 22:03:34,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 22:03:34,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 22:03:34,395 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 22:03:34,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 22:03:34,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 22:03:34,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 22:03:34,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 22:03:34,405 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 22:03:34,407 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 22:03:34,408 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 22:03:34,409 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 22:03:34,410 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 22:03:34,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 22:03:34,414 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 22:03:34,414 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 22:03:34,415 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 22:03:34,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 22:03:34,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 22:03:34,417 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 22:03:34,417 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 22:03:34,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 22:03:34,419 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 22:03:34,420 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 22:03:34,420 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 22:03:34,421 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 22:03:34,421 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 22:03:34,421 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 22:03:34,422 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 22:03:34,423 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 22:03:34,424 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-15 22:03:34,466 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 22:03:34,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 22:03:34,467 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 22:03:34,467 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 22:03:34,468 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 22:03:34,468 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 22:03:34,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 22:03:34,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 22:03:34,469 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 22:03:34,470 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 22:03:34,470 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 22:03:34,471 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-15 22:03:34,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 22:03:34,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 22:03:34,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 22:03:34,471 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-15 22:03:34,472 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-15 22:03:34,472 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-15 22:03:34,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 22:03:34,472 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-15 22:03:34,472 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 22:03:34,472 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 22:03:34,473 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 22:03:34,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 22:03:34,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 22:03:34,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:03:34,474 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 22:03:34,474 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 22:03:34,474 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 22:03:34,474 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 22:03:34,474 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 22:03:34,475 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 22:03:34,475 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 22:03:34,475 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 22:03:34,475 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2023-02-15 22:03:34,706 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 22:03:34,732 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 22:03:34,734 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 22:03:34,735 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 22:03:34,735 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 22:03:34,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0217_1.i [2023-02-15 22:03:35,887 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 22:03:36,109 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 22:03:36,110 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2023-02-15 22:03:36,126 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e23fce4b5/7ddff79380294c6580255aa49ce8f6b6/FLAG7031af6b1 [2023-02-15 22:03:36,137 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e23fce4b5/7ddff79380294c6580255aa49ce8f6b6 [2023-02-15 22:03:36,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 22:03:36,140 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 22:03:36,141 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 22:03:36,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 22:03:36,144 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 22:03:36,144 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,145 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@443fb4c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36, skipping insertion in model container [2023-02-15 22:03:36,145 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 22:03:36,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 22:03:36,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:03:36,464 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 22:03:36,501 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 22:03:36,531 INFO L208 MainTranslator]: Completed translation [2023-02-15 22:03:36,531 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36 WrapperNode [2023-02-15 22:03:36,531 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 22:03:36,533 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 22:03:36,533 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 22:03:36,533 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 22:03:36,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,602 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 249 [2023-02-15 22:03:36,603 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 22:03:36,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 22:03:36,604 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 22:03:36,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 22:03:36,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,624 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,660 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,662 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 22:03:36,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 22:03:36,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 22:03:36,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 22:03:36,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36" (1/1) ... [2023-02-15 22:03:36,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 22:03:36,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:03:36,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 22:03:36,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 22:03:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-02-15 22:03:36,739 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-02-15 22:03:36,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 22:03:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-15 22:03:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 22:03:36,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-15 22:03:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-15 22:03:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 22:03:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-15 22:03:36,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 22:03:36,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 22:03:36,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 22:03:36,950 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 22:03:36,951 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 22:03:37,435 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 22:03:37,442 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 22:03:37,442 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-15 22:03:37,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:03:37 BoogieIcfgContainer [2023-02-15 22:03:37,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 22:03:37,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 22:03:37,447 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 22:03:37,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 22:03:37,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 10:03:36" (1/3) ... [2023-02-15 22:03:37,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efd8cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:03:37, skipping insertion in model container [2023-02-15 22:03:37,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 10:03:36" (2/3) ... [2023-02-15 22:03:37,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3efd8cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 10:03:37, skipping insertion in model container [2023-02-15 22:03:37,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 10:03:37" (3/3) ... [2023-02-15 22:03:37,452 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2023-02-15 22:03:37,465 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 22:03:37,465 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2023-02-15 22:03:37,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 22:03:37,507 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@557f181b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 22:03:37,507 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-02-15 22:03:37,511 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 166 states have internal predecessors, (195), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:03:37,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 22:03:37,516 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:37,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 22:03:37,517 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:37,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:37,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1045674122, now seen corresponding path program 1 times [2023-02-15 22:03:37,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:37,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586453964] [2023-02-15 22:03:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:37,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:37,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:37,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:37,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586453964] [2023-02-15 22:03:37,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586453964] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:37,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:37,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:03:37,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553689663] [2023-02-15 22:03:37,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:37,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 22:03:37,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:37,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 22:03:37,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 22:03:37,742 INFO L87 Difference]: Start difference. First operand has 170 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 166 states have internal predecessors, (195), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:37,768 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2023-02-15 22:03:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 22:03:37,769 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 22:03:37,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:37,776 INFO L225 Difference]: With dead ends: 170 [2023-02-15 22:03:37,776 INFO L226 Difference]: Without dead ends: 168 [2023-02-15 22:03:37,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 22:03:37,781 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:37,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:03:37,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-15 22:03:37,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-02-15 22:03:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 98 states have (on average 1.8979591836734695) internal successors, (186), 164 states have internal predecessors, (186), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:03:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2023-02-15 22:03:37,829 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 6 [2023-02-15 22:03:37,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:37,829 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2023-02-15 22:03:37,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:37,830 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2023-02-15 22:03:37,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 22:03:37,830 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:37,831 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:37,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 22:03:37,832 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:37,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:37,834 INFO L85 PathProgramCache]: Analyzing trace with hash 594374512, now seen corresponding path program 1 times [2023-02-15 22:03:37,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:37,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575851180] [2023-02-15 22:03:37,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:37,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:37,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:37,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575851180] [2023-02-15 22:03:37,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575851180] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:37,960 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:37,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:03:37,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889735654] [2023-02-15 22:03:37,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:37,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:03:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:37,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:03:37,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:37,963 INFO L87 Difference]: Start difference. First operand 168 states and 190 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:38,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:38,023 INFO L93 Difference]: Finished difference Result 331 states and 375 transitions. [2023-02-15 22:03:38,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:03:38,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 22:03:38,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:38,026 INFO L225 Difference]: With dead ends: 331 [2023-02-15 22:03:38,026 INFO L226 Difference]: Without dead ends: 331 [2023-02-15 22:03:38,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:03:38,028 INFO L413 NwaCegarLoop]: 257 mSDtfsCounter, 180 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:38,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 697 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:03:38,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-02-15 22:03:38,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 170. [2023-02-15 22:03:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 100 states have (on average 1.88) internal successors, (188), 166 states have internal predecessors, (188), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:03:38,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2023-02-15 22:03:38,044 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 8 [2023-02-15 22:03:38,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:38,045 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2023-02-15 22:03:38,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2023-02-15 22:03:38,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 22:03:38,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:38,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:38,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 22:03:38,046 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:38,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:38,047 INFO L85 PathProgramCache]: Analyzing trace with hash 592527470, now seen corresponding path program 1 times [2023-02-15 22:03:38,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:38,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991311658] [2023-02-15 22:03:38,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:38,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:38,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:38,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:38,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991311658] [2023-02-15 22:03:38,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991311658] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:38,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:38,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-15 22:03:38,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006088254] [2023-02-15 22:03:38,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:38,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:03:38,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:38,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:03:38,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:03:38,124 INFO L87 Difference]: Start difference. First operand 170 states and 192 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:38,344 INFO L93 Difference]: Finished difference Result 329 states and 372 transitions. [2023-02-15 22:03:38,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:03:38,344 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 22:03:38,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:38,350 INFO L225 Difference]: With dead ends: 329 [2023-02-15 22:03:38,351 INFO L226 Difference]: Without dead ends: 329 [2023-02-15 22:03:38,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:03:38,357 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 170 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:38,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 249 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:38,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-15 22:03:38,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 237. [2023-02-15 22:03:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 164 states have (on average 1.8658536585365855) internal successors, (306), 230 states have internal predecessors, (306), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 22:03:38,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 314 transitions. [2023-02-15 22:03:38,386 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 314 transitions. Word has length 8 [2023-02-15 22:03:38,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:38,386 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 314 transitions. [2023-02-15 22:03:38,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:38,387 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 314 transitions. [2023-02-15 22:03:38,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 22:03:38,387 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:38,387 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:38,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 22:03:38,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:38,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:38,389 INFO L85 PathProgramCache]: Analyzing trace with hash 592527471, now seen corresponding path program 1 times [2023-02-15 22:03:38,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:38,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061251297] [2023-02-15 22:03:38,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:38,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:38,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:38,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061251297] [2023-02-15 22:03:38,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061251297] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:38,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:38,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:03:38,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138375664] [2023-02-15 22:03:38,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:38,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:03:38,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:38,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:03:38,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:38,520 INFO L87 Difference]: Start difference. First operand 237 states and 314 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:38,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:38,695 INFO L93 Difference]: Finished difference Result 384 states and 490 transitions. [2023-02-15 22:03:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:03:38,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 22:03:38,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:38,699 INFO L225 Difference]: With dead ends: 384 [2023-02-15 22:03:38,699 INFO L226 Difference]: Without dead ends: 384 [2023-02-15 22:03:38,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:03:38,709 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 141 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:38,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 419 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:38,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-02-15 22:03:38,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2023-02-15 22:03:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 239 states have (on average 1.8284518828451883) internal successors, (437), 307 states have internal predecessors, (437), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 22:03:38,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2023-02-15 22:03:38,733 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 8 [2023-02-15 22:03:38,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:38,733 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2023-02-15 22:03:38,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:38,734 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2023-02-15 22:03:38,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 22:03:38,734 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:38,734 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:38,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-15 22:03:38,735 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:38,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:38,736 INFO L85 PathProgramCache]: Analyzing trace with hash 592527533, now seen corresponding path program 1 times [2023-02-15 22:03:38,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:38,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77945110] [2023-02-15 22:03:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:38,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:38,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:38,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:38,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:38,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77945110] [2023-02-15 22:03:38,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77945110] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:38,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:38,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:03:38,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104973236] [2023-02-15 22:03:38,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:38,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:03:38,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:03:38,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:38,860 INFO L87 Difference]: Start difference. First operand 318 states and 453 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:39,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:39,010 INFO L93 Difference]: Finished difference Result 383 states and 488 transitions. [2023-02-15 22:03:39,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:03:39,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 22:03:39,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:39,013 INFO L225 Difference]: With dead ends: 383 [2023-02-15 22:03:39,013 INFO L226 Difference]: Without dead ends: 383 [2023-02-15 22:03:39,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:03:39,014 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 123 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:39,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 434 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:39,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-15 22:03:39,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 318. [2023-02-15 22:03:39,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 239 states have (on average 1.8284518828451883) internal successors, (437), 307 states have internal predecessors, (437), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 22:03:39,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2023-02-15 22:03:39,037 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 8 [2023-02-15 22:03:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:39,037 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2023-02-15 22:03:39,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2023-02-15 22:03:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 22:03:39,042 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:39,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:39,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-15 22:03:39,043 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:39,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash -329469321, now seen corresponding path program 1 times [2023-02-15 22:03:39,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:39,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066551757] [2023-02-15 22:03:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:39,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:39,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:39,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066551757] [2023-02-15 22:03:39,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066551757] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:39,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:39,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:03:39,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505460601] [2023-02-15 22:03:39,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:39,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:03:39,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:39,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:03:39,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:03:39,093 INFO L87 Difference]: Start difference. First operand 318 states and 453 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:39,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:39,110 INFO L93 Difference]: Finished difference Result 459 states and 609 transitions. [2023-02-15 22:03:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:03:39,111 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 22:03:39,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:39,113 INFO L225 Difference]: With dead ends: 459 [2023-02-15 22:03:39,113 INFO L226 Difference]: Without dead ends: 459 [2023-02-15 22:03:39,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:03:39,115 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 161 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:39,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 372 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:03:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-02-15 22:03:39,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 320. [2023-02-15 22:03:39,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 241 states have (on average 1.8132780082987552) internal successors, (437), 309 states have internal predecessors, (437), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 22:03:39,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 453 transitions. [2023-02-15 22:03:39,124 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 453 transitions. Word has length 11 [2023-02-15 22:03:39,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:39,124 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 453 transitions. [2023-02-15 22:03:39,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:39,124 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 453 transitions. [2023-02-15 22:03:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 22:03:39,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:39,125 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:39,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-15 22:03:39,126 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:39,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:39,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1623615594, now seen corresponding path program 1 times [2023-02-15 22:03:39,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:39,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684494194] [2023-02-15 22:03:39,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:39,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:39,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:39,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:39,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684494194] [2023-02-15 22:03:39,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684494194] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:39,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:39,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:03:39,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101766733] [2023-02-15 22:03:39,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:39,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:03:39,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:39,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:03:39,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:03:39,164 INFO L87 Difference]: Start difference. First operand 320 states and 453 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:39,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:39,251 INFO L93 Difference]: Finished difference Result 371 states and 500 transitions. [2023-02-15 22:03:39,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:03:39,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 22:03:39,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:39,254 INFO L225 Difference]: With dead ends: 371 [2023-02-15 22:03:39,254 INFO L226 Difference]: Without dead ends: 364 [2023-02-15 22:03:39,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:03:39,255 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 71 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:39,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 287 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:39,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-02-15 22:03:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 317. [2023-02-15 22:03:39,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 238 states have (on average 1.815126050420168) internal successors, (432), 306 states have internal predecessors, (432), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 22:03:39,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 448 transitions. [2023-02-15 22:03:39,263 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 448 transitions. Word has length 12 [2023-02-15 22:03:39,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:39,263 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 448 transitions. [2023-02-15 22:03:39,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 22:03:39,264 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 448 transitions. [2023-02-15 22:03:39,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 22:03:39,266 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:39,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:39,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-15 22:03:39,266 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:39,267 INFO L85 PathProgramCache]: Analyzing trace with hash -321333405, now seen corresponding path program 1 times [2023-02-15 22:03:39,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:39,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356386610] [2023-02-15 22:03:39,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:39,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:39,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:39,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:39,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:39,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356386610] [2023-02-15 22:03:39,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356386610] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:39,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:39,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:03:39,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383072826] [2023-02-15 22:03:39,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:39,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:03:39,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:39,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:03:39,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:39,313 INFO L87 Difference]: Start difference. First operand 317 states and 448 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:39,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:39,334 INFO L93 Difference]: Finished difference Result 515 states and 714 transitions. [2023-02-15 22:03:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:03:39,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-15 22:03:39,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:39,337 INFO L225 Difference]: With dead ends: 515 [2023-02-15 22:03:39,337 INFO L226 Difference]: Without dead ends: 515 [2023-02-15 22:03:39,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:03:39,338 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 176 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:39,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 536 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:03:39,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-02-15 22:03:39,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 321. [2023-02-15 22:03:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 242 states have (on average 1.7933884297520661) internal successors, (434), 310 states have internal predecessors, (434), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 22:03:39,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2023-02-15 22:03:39,346 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 17 [2023-02-15 22:03:39,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:39,346 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2023-02-15 22:03:39,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:39,347 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2023-02-15 22:03:39,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 22:03:39,347 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:39,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:39,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-15 22:03:39,348 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1022397983, now seen corresponding path program 1 times [2023-02-15 22:03:39,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:39,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587069443] [2023-02-15 22:03:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:39,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:39,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:39,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:39,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587069443] [2023-02-15 22:03:39,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587069443] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:39,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:39,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:03:39,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150502773] [2023-02-15 22:03:39,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:39,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:03:39,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:39,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:03:39,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:03:39,375 INFO L87 Difference]: Start difference. First operand 321 states and 450 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:39,384 INFO L93 Difference]: Finished difference Result 325 states and 454 transitions. [2023-02-15 22:03:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:03:39,385 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-15 22:03:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:39,386 INFO L225 Difference]: With dead ends: 325 [2023-02-15 22:03:39,386 INFO L226 Difference]: Without dead ends: 325 [2023-02-15 22:03:39,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:03:39,389 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 0 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:39,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 373 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:03:39,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-02-15 22:03:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2023-02-15 22:03:39,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 246 states have (on average 1.7804878048780488) internal successors, (438), 314 states have internal predecessors, (438), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 22:03:39,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 454 transitions. [2023-02-15 22:03:39,399 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 454 transitions. Word has length 17 [2023-02-15 22:03:39,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:39,399 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 454 transitions. [2023-02-15 22:03:39,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:39,399 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 454 transitions. [2023-02-15 22:03:39,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 22:03:39,400 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:39,400 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:39,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-15 22:03:39,401 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:39,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:39,401 INFO L85 PathProgramCache]: Analyzing trace with hash -213051357, now seen corresponding path program 1 times [2023-02-15 22:03:39,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:39,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110764071] [2023-02-15 22:03:39,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:39,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:39,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:39,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:39,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:39,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110764071] [2023-02-15 22:03:39,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110764071] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:39,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:39,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:03:39,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241230540] [2023-02-15 22:03:39,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:39,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:03:39,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:39,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:03:39,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:39,499 INFO L87 Difference]: Start difference. First operand 325 states and 454 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:39,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:39,736 INFO L93 Difference]: Finished difference Result 550 states and 690 transitions. [2023-02-15 22:03:39,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:03:39,737 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-15 22:03:39,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:39,739 INFO L225 Difference]: With dead ends: 550 [2023-02-15 22:03:39,740 INFO L226 Difference]: Without dead ends: 550 [2023-02-15 22:03:39,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:03:39,741 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 328 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:39,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 440 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:39,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-02-15 22:03:39,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 331. [2023-02-15 22:03:39,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 252 states have (on average 1.7619047619047619) internal successors, (444), 320 states have internal predecessors, (444), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 22:03:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 460 transitions. [2023-02-15 22:03:39,753 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 460 transitions. Word has length 17 [2023-02-15 22:03:39,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:39,754 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 460 transitions. [2023-02-15 22:03:39,754 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 460 transitions. [2023-02-15 22:03:39,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 22:03:39,756 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:39,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:39,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-15 22:03:39,757 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:39,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:39,757 INFO L85 PathProgramCache]: Analyzing trace with hash -213051356, now seen corresponding path program 1 times [2023-02-15 22:03:39,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:39,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339430122] [2023-02-15 22:03:39,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:39,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:39,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:39,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:39,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339430122] [2023-02-15 22:03:39,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339430122] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:39,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:39,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:03:39,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775067175] [2023-02-15 22:03:39,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:39,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:03:39,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:39,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:03:39,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:39,856 INFO L87 Difference]: Start difference. First operand 331 states and 460 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:40,019 INFO L93 Difference]: Finished difference Result 378 states and 479 transitions. [2023-02-15 22:03:40,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:03:40,020 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-02-15 22:03:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:40,022 INFO L225 Difference]: With dead ends: 378 [2023-02-15 22:03:40,022 INFO L226 Difference]: Without dead ends: 378 [2023-02-15 22:03:40,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:03:40,023 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 172 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:40,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 442 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:40,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-02-15 22:03:40,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 331. [2023-02-15 22:03:40,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 252 states have (on average 1.7380952380952381) internal successors, (438), 320 states have internal predecessors, (438), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 22:03:40,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 454 transitions. [2023-02-15 22:03:40,031 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 454 transitions. Word has length 17 [2023-02-15 22:03:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:40,032 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 454 transitions. [2023-02-15 22:03:40,032 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:40,032 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 454 transitions. [2023-02-15 22:03:40,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 22:03:40,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:40,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:40,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-15 22:03:40,036 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:40,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:40,036 INFO L85 PathProgramCache]: Analyzing trace with hash 490210144, now seen corresponding path program 1 times [2023-02-15 22:03:40,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:40,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105936314] [2023-02-15 22:03:40,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:40,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:40,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:40,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:40,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:40,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:40,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105936314] [2023-02-15 22:03:40,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105936314] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:40,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:40,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:03:40,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023418502] [2023-02-15 22:03:40,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:40,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 22:03:40,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:40,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 22:03:40,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:03:40,154 INFO L87 Difference]: Start difference. First operand 331 states and 454 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:40,490 INFO L93 Difference]: Finished difference Result 680 states and 803 transitions. [2023-02-15 22:03:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:03:40,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-02-15 22:03:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:40,494 INFO L225 Difference]: With dead ends: 680 [2023-02-15 22:03:40,494 INFO L226 Difference]: Without dead ends: 680 [2023-02-15 22:03:40,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:03:40,494 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 805 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:40,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 562 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 22:03:40,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2023-02-15 22:03:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 328. [2023-02-15 22:03:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 253 states have (on average 1.7075098814229248) internal successors, (432), 317 states have internal predecessors, (432), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 22:03:40,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 448 transitions. [2023-02-15 22:03:40,502 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 448 transitions. Word has length 18 [2023-02-15 22:03:40,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:40,502 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 448 transitions. [2023-02-15 22:03:40,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:40,503 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 448 transitions. [2023-02-15 22:03:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-15 22:03:40,503 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:40,503 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:40,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-15 22:03:40,504 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:40,504 INFO L85 PathProgramCache]: Analyzing trace with hash 490210145, now seen corresponding path program 1 times [2023-02-15 22:03:40,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:40,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534468552] [2023-02-15 22:03:40,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:40,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:40,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:40,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:40,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:40,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:40,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534468552] [2023-02-15 22:03:40,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534468552] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:40,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:40,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:03:40,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552035982] [2023-02-15 22:03:40,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:40,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:03:40,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:40,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:03:40,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:03:40,709 INFO L87 Difference]: Start difference. First operand 328 states and 448 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:41,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:41,319 INFO L93 Difference]: Finished difference Result 662 states and 804 transitions. [2023-02-15 22:03:41,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:03:41,320 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-02-15 22:03:41,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:41,322 INFO L225 Difference]: With dead ends: 662 [2023-02-15 22:03:41,322 INFO L226 Difference]: Without dead ends: 662 [2023-02-15 22:03:41,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-02-15 22:03:41,323 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 626 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:41,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [630 Valid, 756 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 22:03:41,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2023-02-15 22:03:41,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 348. [2023-02-15 22:03:41,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 273 states have (on average 1.7106227106227105) internal successors, (467), 337 states have internal predecessors, (467), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 22:03:41,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 483 transitions. [2023-02-15 22:03:41,334 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 483 transitions. Word has length 18 [2023-02-15 22:03:41,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:41,334 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 483 transitions. [2023-02-15 22:03:41,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:41,335 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 483 transitions. [2023-02-15 22:03:41,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 22:03:41,335 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:41,335 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] [2023-02-15 22:03:41,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-15 22:03:41,336 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash -254199642, now seen corresponding path program 1 times [2023-02-15 22:03:41,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:41,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120227541] [2023-02-15 22:03:41,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:41,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:41,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:41,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:41,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:41,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:41,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120227541] [2023-02-15 22:03:41,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120227541] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:41,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:41,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-15 22:03:41,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526783408] [2023-02-15 22:03:41,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:41,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 22:03:41,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:41,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 22:03:41,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 22:03:41,671 INFO L87 Difference]: Start difference. First operand 348 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:42,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:42,052 INFO L93 Difference]: Finished difference Result 532 states and 706 transitions. [2023-02-15 22:03:42,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:03:42,053 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2023-02-15 22:03:42,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:42,054 INFO L225 Difference]: With dead ends: 532 [2023-02-15 22:03:42,055 INFO L226 Difference]: Without dead ends: 532 [2023-02-15 22:03:42,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:03:42,055 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 176 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 1080 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:42,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 1080 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-02-15 22:03:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 407. [2023-02-15 22:03:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 329 states have (on average 1.674772036474164) internal successors, (551), 392 states have internal predecessors, (551), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 571 transitions. [2023-02-15 22:03:42,064 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 571 transitions. Word has length 22 [2023-02-15 22:03:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:42,064 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 571 transitions. [2023-02-15 22:03:42,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:42,065 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 571 transitions. [2023-02-15 22:03:42,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 22:03:42,065 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:42,065 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:42,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-15 22:03:42,066 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:42,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:42,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1832886663, now seen corresponding path program 1 times [2023-02-15 22:03:42,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:42,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629799360] [2023-02-15 22:03:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:42,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:42,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:42,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:42,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:42,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629799360] [2023-02-15 22:03:42,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629799360] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:42,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:42,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-15 22:03:42,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462261035] [2023-02-15 22:03:42,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:42,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 22:03:42,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:42,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 22:03:42,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-15 22:03:42,489 INFO L87 Difference]: Start difference. First operand 407 states and 571 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:43,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:43,227 INFO L93 Difference]: Finished difference Result 754 states and 1029 transitions. [2023-02-15 22:03:43,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 22:03:43,228 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-15 22:03:43,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:43,230 INFO L225 Difference]: With dead ends: 754 [2023-02-15 22:03:43,231 INFO L226 Difference]: Without dead ends: 752 [2023-02-15 22:03:43,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:03:43,231 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 531 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1611 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:43,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1611 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:03:43,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2023-02-15 22:03:43,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 401. [2023-02-15 22:03:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 323 states have (on average 1.671826625386997) internal successors, (540), 386 states have internal predecessors, (540), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 560 transitions. [2023-02-15 22:03:43,240 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 560 transitions. Word has length 23 [2023-02-15 22:03:43,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:43,241 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 560 transitions. [2023-02-15 22:03:43,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 560 transitions. [2023-02-15 22:03:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 22:03:43,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:43,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:43,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-15 22:03:43,242 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:43,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:43,243 INFO L85 PathProgramCache]: Analyzing trace with hash 499344936, now seen corresponding path program 1 times [2023-02-15 22:03:43,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:43,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968379027] [2023-02-15 22:03:43,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:43,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:43,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:43,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:43,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:43,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:43,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968379027] [2023-02-15 22:03:43,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968379027] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:43,327 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:43,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:03:43,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870537070] [2023-02-15 22:03:43,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:43,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:03:43,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:43,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:03:43,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:03:43,328 INFO L87 Difference]: Start difference. First operand 401 states and 560 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:43,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:43,403 INFO L93 Difference]: Finished difference Result 434 states and 563 transitions. [2023-02-15 22:03:43,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:03:43,404 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-15 22:03:43,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:43,405 INFO L225 Difference]: With dead ends: 434 [2023-02-15 22:03:43,405 INFO L226 Difference]: Without dead ends: 434 [2023-02-15 22:03:43,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-15 22:03:43,406 INFO L413 NwaCegarLoop]: 255 mSDtfsCounter, 246 mSDsluCounter, 752 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:43,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 1007 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:43,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-02-15 22:03:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 401. [2023-02-15 22:03:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 323 states have (on average 1.6656346749226005) internal successors, (538), 386 states have internal predecessors, (538), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 558 transitions. [2023-02-15 22:03:43,414 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 558 transitions. Word has length 23 [2023-02-15 22:03:43,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:43,414 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 558 transitions. [2023-02-15 22:03:43,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 558 transitions. [2023-02-15 22:03:43,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 22:03:43,415 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:43,415 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:43,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-15 22:03:43,416 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:43,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:43,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2020614998, now seen corresponding path program 1 times [2023-02-15 22:03:43,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:43,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802220668] [2023-02-15 22:03:43,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:43,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:43,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:43,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:43,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:43,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:43,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802220668] [2023-02-15 22:03:43,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802220668] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:43,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:43,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:03:43,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699418844] [2023-02-15 22:03:43,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:43,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:03:43,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:03:43,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:03:43,502 INFO L87 Difference]: Start difference. First operand 401 states and 558 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:43,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:43,568 INFO L93 Difference]: Finished difference Result 430 states and 555 transitions. [2023-02-15 22:03:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:03:43,568 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-15 22:03:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:43,570 INFO L225 Difference]: With dead ends: 430 [2023-02-15 22:03:43,570 INFO L226 Difference]: Without dead ends: 430 [2023-02-15 22:03:43,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-15 22:03:43,571 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 243 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:43,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 1017 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:03:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-02-15 22:03:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 399. [2023-02-15 22:03:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 321 states have (on average 1.6573208722741433) internal successors, (532), 384 states have internal predecessors, (532), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:43,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 552 transitions. [2023-02-15 22:03:43,579 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 552 transitions. Word has length 23 [2023-02-15 22:03:43,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:43,579 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 552 transitions. [2023-02-15 22:03:43,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:43,579 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 552 transitions. [2023-02-15 22:03:43,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 22:03:43,580 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:43,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:43,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-15 22:03:43,580 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:43,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:43,581 INFO L85 PathProgramCache]: Analyzing trace with hash 535975453, now seen corresponding path program 1 times [2023-02-15 22:03:43,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:43,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277658022] [2023-02-15 22:03:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:43,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:43,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:43,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277658022] [2023-02-15 22:03:43,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277658022] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:43,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:43,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 22:03:43,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231485173] [2023-02-15 22:03:43,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:43,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:03:43,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:43,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:03:43,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:03:43,611 INFO L87 Difference]: Start difference. First operand 399 states and 552 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:43,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:43,706 INFO L93 Difference]: Finished difference Result 487 states and 646 transitions. [2023-02-15 22:03:43,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:03:43,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2023-02-15 22:03:43,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:43,709 INFO L225 Difference]: With dead ends: 487 [2023-02-15 22:03:43,709 INFO L226 Difference]: Without dead ends: 487 [2023-02-15 22:03:43,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:03:43,710 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 150 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:43,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 273 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:43,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-02-15 22:03:43,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 396. [2023-02-15 22:03:43,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 321 states have (on average 1.6292834890965733) internal successors, (523), 381 states have internal predecessors, (523), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:43,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 543 transitions. [2023-02-15 22:03:43,718 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 543 transitions. Word has length 24 [2023-02-15 22:03:43,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:43,718 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 543 transitions. [2023-02-15 22:03:43,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:43,718 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 543 transitions. [2023-02-15 22:03:43,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 22:03:43,718 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:43,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:43,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-15 22:03:43,719 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:43,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:43,719 INFO L85 PathProgramCache]: Analyzing trace with hash 535975454, now seen corresponding path program 1 times [2023-02-15 22:03:43,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:43,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371929792] [2023-02-15 22:03:43,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:43,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:43,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:43,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:43,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371929792] [2023-02-15 22:03:43,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371929792] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:43,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:43,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:03:43,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534203779] [2023-02-15 22:03:43,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:43,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:03:43,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:43,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:03:43,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:43,786 INFO L87 Difference]: Start difference. First operand 396 states and 543 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) [2023-02-15 22:03:43,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:43,873 INFO L93 Difference]: Finished difference Result 425 states and 540 transitions. [2023-02-15 22:03:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:03:43,874 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 [2023-02-15 22:03:43,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:43,875 INFO L225 Difference]: With dead ends: 425 [2023-02-15 22:03:43,875 INFO L226 Difference]: Without dead ends: 425 [2023-02-15 22:03:43,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:43,876 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 318 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:43,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 280 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:43,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-02-15 22:03:43,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 394. [2023-02-15 22:03:43,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 321 states have (on average 1.6105919003115265) internal successors, (517), 379 states have internal predecessors, (517), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:43,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 537 transitions. [2023-02-15 22:03:43,884 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 537 transitions. Word has length 24 [2023-02-15 22:03:43,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:43,884 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 537 transitions. [2023-02-15 22:03:43,884 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) [2023-02-15 22:03:43,884 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 537 transitions. [2023-02-15 22:03:43,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 22:03:43,885 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:43,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:43,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-15 22:03:43,885 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:43,886 INFO L85 PathProgramCache]: Analyzing trace with hash 475133714, now seen corresponding path program 1 times [2023-02-15 22:03:43,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:43,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534258995] [2023-02-15 22:03:43,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:43,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:43,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:43,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:43,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:43,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:43,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:43,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534258995] [2023-02-15 22:03:43,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534258995] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:43,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:43,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:03:43,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905517467] [2023-02-15 22:03:43,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:43,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:03:43,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:43,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:03:43,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:43,940 INFO L87 Difference]: Start difference. First operand 394 states and 537 transitions. Second operand has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:44,130 INFO L93 Difference]: Finished difference Result 619 states and 786 transitions. [2023-02-15 22:03:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:03:44,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-15 22:03:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:44,132 INFO L225 Difference]: With dead ends: 619 [2023-02-15 22:03:44,132 INFO L226 Difference]: Without dead ends: 619 [2023-02-15 22:03:44,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:03:44,133 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 286 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:44,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 428 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:44,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2023-02-15 22:03:44,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 414. [2023-02-15 22:03:44,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 341 states have (on average 1.6334310850439884) internal successors, (557), 399 states have internal predecessors, (557), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 577 transitions. [2023-02-15 22:03:44,141 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 577 transitions. Word has length 25 [2023-02-15 22:03:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:44,141 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 577 transitions. [2023-02-15 22:03:44,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.666666666666667) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:44,142 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 577 transitions. [2023-02-15 22:03:44,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-15 22:03:44,142 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:44,142 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:44,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-15 22:03:44,143 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:44,143 INFO L85 PathProgramCache]: Analyzing trace with hash 475133715, now seen corresponding path program 1 times [2023-02-15 22:03:44,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:44,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881585204] [2023-02-15 22:03:44,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:44,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:44,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:44,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:44,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:44,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881585204] [2023-02-15 22:03:44,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881585204] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:44,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:44,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:03:44,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12771764] [2023-02-15 22:03:44,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:44,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:03:44,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:44,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:03:44,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:03:44,311 INFO L87 Difference]: Start difference. First operand 414 states and 577 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:44,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:44,542 INFO L93 Difference]: Finished difference Result 457 states and 592 transitions. [2023-02-15 22:03:44,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:03:44,543 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-15 22:03:44,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:44,544 INFO L225 Difference]: With dead ends: 457 [2023-02-15 22:03:44,544 INFO L226 Difference]: Without dead ends: 457 [2023-02-15 22:03:44,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-15 22:03:44,545 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 319 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:44,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 506 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-02-15 22:03:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 414. [2023-02-15 22:03:44,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 341 states have (on average 1.6070381231671553) internal successors, (548), 399 states have internal predecessors, (548), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 568 transitions. [2023-02-15 22:03:44,553 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 568 transitions. Word has length 25 [2023-02-15 22:03:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:44,553 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 568 transitions. [2023-02-15 22:03:44,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:44,553 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 568 transitions. [2023-02-15 22:03:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 22:03:44,554 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:44,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:44,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-15 22:03:44,554 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:44,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:44,555 INFO L85 PathProgramCache]: Analyzing trace with hash -323662464, now seen corresponding path program 1 times [2023-02-15 22:03:44,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:44,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338656691] [2023-02-15 22:03:44,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:44,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:44,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:44,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:44,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:44,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:44,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338656691] [2023-02-15 22:03:44,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338656691] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:44,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:44,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:03:44,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741535312] [2023-02-15 22:03:44,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:44,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:03:44,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:44,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:03:44,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:44,628 INFO L87 Difference]: Start difference. First operand 414 states and 568 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) [2023-02-15 22:03:44,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:44,716 INFO L93 Difference]: Finished difference Result 441 states and 568 transitions. [2023-02-15 22:03:44,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:03:44,716 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 [2023-02-15 22:03:44,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:44,718 INFO L225 Difference]: With dead ends: 441 [2023-02-15 22:03:44,718 INFO L226 Difference]: Without dead ends: 441 [2023-02-15 22:03:44,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:44,719 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 312 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:44,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 278 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-02-15 22:03:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 413. [2023-02-15 22:03:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 341 states have (on average 1.598240469208211) internal successors, (545), 398 states have internal predecessors, (545), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:44,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 565 transitions. [2023-02-15 22:03:44,726 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 565 transitions. Word has length 26 [2023-02-15 22:03:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:44,726 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 565 transitions. [2023-02-15 22:03:44,726 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) [2023-02-15 22:03:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 565 transitions. [2023-02-15 22:03:44,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-15 22:03:44,727 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:44,727 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:44,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-15 22:03:44,727 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:44,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash -323662657, now seen corresponding path program 1 times [2023-02-15 22:03:44,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:44,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302090014] [2023-02-15 22:03:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:44,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:44,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:44,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:44,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:44,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:44,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302090014] [2023-02-15 22:03:44,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302090014] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:44,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:44,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 22:03:44,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009890506] [2023-02-15 22:03:44,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:44,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:03:44,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:44,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:03:44,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:03:44,819 INFO L87 Difference]: Start difference. First operand 413 states and 565 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:44,992 INFO L93 Difference]: Finished difference Result 625 states and 836 transitions. [2023-02-15 22:03:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:03:44,992 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-02-15 22:03:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:44,995 INFO L225 Difference]: With dead ends: 625 [2023-02-15 22:03:44,995 INFO L226 Difference]: Without dead ends: 625 [2023-02-15 22:03:44,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-15 22:03:44,995 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 155 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 1249 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:44,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 1249 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:44,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-02-15 22:03:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 443. [2023-02-15 22:03:45,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 371 states have (on average 1.5633423180592991) internal successors, (580), 428 states have internal predecessors, (580), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 600 transitions. [2023-02-15 22:03:45,005 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 600 transitions. Word has length 26 [2023-02-15 22:03:45,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:45,005 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 600 transitions. [2023-02-15 22:03:45,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:45,005 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 600 transitions. [2023-02-15 22:03:45,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 22:03:45,006 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:45,006 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:45,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-15 22:03:45,006 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:45,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:45,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1503548246, now seen corresponding path program 1 times [2023-02-15 22:03:45,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:45,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735496935] [2023-02-15 22:03:45,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:45,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:45,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:45,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:45,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:45,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:45,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735496935] [2023-02-15 22:03:45,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735496935] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:45,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:45,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:03:45,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082466144] [2023-02-15 22:03:45,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:45,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:03:45,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:03:45,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:03:45,132 INFO L87 Difference]: Start difference. First operand 443 states and 600 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:45,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:45,402 INFO L93 Difference]: Finished difference Result 782 states and 1012 transitions. [2023-02-15 22:03:45,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 22:03:45,402 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-02-15 22:03:45,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:45,405 INFO L225 Difference]: With dead ends: 782 [2023-02-15 22:03:45,405 INFO L226 Difference]: Without dead ends: 782 [2023-02-15 22:03:45,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:03:45,406 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 507 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1413 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:45,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1413 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2023-02-15 22:03:45,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 440. [2023-02-15 22:03:45,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 371 states have (on average 1.536388140161725) internal successors, (570), 425 states have internal predecessors, (570), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 590 transitions. [2023-02-15 22:03:45,415 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 590 transitions. Word has length 28 [2023-02-15 22:03:45,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:45,416 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 590 transitions. [2023-02-15 22:03:45,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 590 transitions. [2023-02-15 22:03:45,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 22:03:45,416 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:45,416 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:45,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-15 22:03:45,417 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:45,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:45,417 INFO L85 PathProgramCache]: Analyzing trace with hash 634621977, now seen corresponding path program 1 times [2023-02-15 22:03:45,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:45,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461565555] [2023-02-15 22:03:45,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:45,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:45,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:45,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:45,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:45,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461565555] [2023-02-15 22:03:45,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461565555] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:45,524 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:45,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:03:45,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003722936] [2023-02-15 22:03:45,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:45,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 22:03:45,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:45,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 22:03:45,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:03:45,526 INFO L87 Difference]: Start difference. First operand 440 states and 590 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:45,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:45,663 INFO L93 Difference]: Finished difference Result 505 states and 649 transitions. [2023-02-15 22:03:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:03:45,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-02-15 22:03:45,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:45,667 INFO L225 Difference]: With dead ends: 505 [2023-02-15 22:03:45,667 INFO L226 Difference]: Without dead ends: 505 [2023-02-15 22:03:45,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:03:45,668 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 154 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:45,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 635 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-02-15 22:03:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 440. [2023-02-15 22:03:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 371 states have (on average 1.5336927223719676) internal successors, (569), 425 states have internal predecessors, (569), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:45,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 589 transitions. [2023-02-15 22:03:45,682 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 589 transitions. Word has length 29 [2023-02-15 22:03:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:45,682 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 589 transitions. [2023-02-15 22:03:45,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:45,683 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 589 transitions. [2023-02-15 22:03:45,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 22:03:45,683 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:45,683 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:45,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-15 22:03:45,684 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:45,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:45,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1800846934, now seen corresponding path program 1 times [2023-02-15 22:03:45,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:45,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044019826] [2023-02-15 22:03:45,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:45,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:45,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:45,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:45,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:45,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044019826] [2023-02-15 22:03:45,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044019826] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:45,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:45,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:03:45,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703390038] [2023-02-15 22:03:45,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:45,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:03:45,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:45,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:03:45,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:03:45,978 INFO L87 Difference]: Start difference. First operand 440 states and 589 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:46,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:46,192 INFO L93 Difference]: Finished difference Result 487 states and 625 transitions. [2023-02-15 22:03:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:03:46,193 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-02-15 22:03:46,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:46,195 INFO L225 Difference]: With dead ends: 487 [2023-02-15 22:03:46,195 INFO L226 Difference]: Without dead ends: 487 [2023-02-15 22:03:46,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 22:03:46,195 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 130 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:46,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 801 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:46,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-02-15 22:03:46,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 434. [2023-02-15 22:03:46,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 365 states have (on average 1.526027397260274) internal successors, (557), 419 states have internal predecessors, (557), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 22:03:46,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 577 transitions. [2023-02-15 22:03:46,206 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 577 transitions. Word has length 30 [2023-02-15 22:03:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:46,206 INFO L495 AbstractCegarLoop]: Abstraction has 434 states and 577 transitions. [2023-02-15 22:03:46,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 577 transitions. [2023-02-15 22:03:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 22:03:46,207 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:46,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:46,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-15 22:03:46,207 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:46,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:46,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1801554935, now seen corresponding path program 1 times [2023-02-15 22:03:46,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:46,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685103091] [2023-02-15 22:03:46,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:46,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:46,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:46,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:46,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:46,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685103091] [2023-02-15 22:03:46,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685103091] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:46,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:46,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:03:46,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422189027] [2023-02-15 22:03:46,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:46,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 22:03:46,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:46,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 22:03:46,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:03:46,353 INFO L87 Difference]: Start difference. First operand 434 states and 577 transitions. Second operand has 5 states, 4 states have (on average 7.0) 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) [2023-02-15 22:03:46,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:46,517 INFO L93 Difference]: Finished difference Result 564 states and 726 transitions. [2023-02-15 22:03:46,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 22:03:46,517 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.0) 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 [2023-02-15 22:03:46,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:46,519 INFO L225 Difference]: With dead ends: 564 [2023-02-15 22:03:46,519 INFO L226 Difference]: Without dead ends: 564 [2023-02-15 22:03:46,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:03:46,520 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 185 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:46,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 626 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:46,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2023-02-15 22:03:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 475. [2023-02-15 22:03:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 403 states have (on average 1.5186104218362282) internal successors, (612), 458 states have internal predecessors, (612), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 22:03:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 636 transitions. [2023-02-15 22:03:46,529 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 636 transitions. Word has length 30 [2023-02-15 22:03:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:46,530 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 636 transitions. [2023-02-15 22:03:46,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.0) 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) [2023-02-15 22:03:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 636 transitions. [2023-02-15 22:03:46,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 22:03:46,530 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:46,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:46,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-15 22:03:46,531 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:46,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:46,531 INFO L85 PathProgramCache]: Analyzing trace with hash -422463925, now seen corresponding path program 1 times [2023-02-15 22:03:46,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:46,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523831693] [2023-02-15 22:03:46,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:46,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:46,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:46,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:46,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:46,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:46,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523831693] [2023-02-15 22:03:46,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523831693] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:46,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:46,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:03:46,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111726362] [2023-02-15 22:03:46,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:46,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:03:46,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:46,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:03:46,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:03:46,710 INFO L87 Difference]: Start difference. First operand 475 states and 636 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:47,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:47,176 INFO L93 Difference]: Finished difference Result 839 states and 1088 transitions. [2023-02-15 22:03:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 22:03:47,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-02-15 22:03:47,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:47,179 INFO L225 Difference]: With dead ends: 839 [2023-02-15 22:03:47,179 INFO L226 Difference]: Without dead ends: 839 [2023-02-15 22:03:47,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-02-15 22:03:47,180 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 417 mSDsluCounter, 739 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:47,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 1001 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:03:47,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2023-02-15 22:03:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 518. [2023-02-15 22:03:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 443 states have (on average 1.5033860045146727) internal successors, (666), 499 states have internal predecessors, (666), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 22:03:47,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 694 transitions. [2023-02-15 22:03:47,194 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 694 transitions. Word has length 32 [2023-02-15 22:03:47,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:47,194 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 694 transitions. [2023-02-15 22:03:47,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 6 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 694 transitions. [2023-02-15 22:03:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-15 22:03:47,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:47,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:47,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-15 22:03:47,195 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:47,196 INFO L85 PathProgramCache]: Analyzing trace with hash -211479523, now seen corresponding path program 1 times [2023-02-15 22:03:47,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:47,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833672307] [2023-02-15 22:03:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:47,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:47,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:47,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:47,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:47,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:47,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:47,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833672307] [2023-02-15 22:03:47,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833672307] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:47,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:47,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:03:47,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487644676] [2023-02-15 22:03:47,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:47,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:03:47,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:47,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:03:47,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:03:47,398 INFO L87 Difference]: Start difference. First operand 518 states and 694 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:47,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:47,723 INFO L93 Difference]: Finished difference Result 643 states and 828 transitions. [2023-02-15 22:03:47,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:03:47,723 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2023-02-15 22:03:47,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:47,725 INFO L225 Difference]: With dead ends: 643 [2023-02-15 22:03:47,725 INFO L226 Difference]: Without dead ends: 643 [2023-02-15 22:03:47,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:03:47,726 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 289 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:47,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 864 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:47,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2023-02-15 22:03:47,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 518. [2023-02-15 22:03:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 443 states have (on average 1.4943566591422122) internal successors, (662), 499 states have internal predecessors, (662), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 22:03:47,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 690 transitions. [2023-02-15 22:03:47,737 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 690 transitions. Word has length 33 [2023-02-15 22:03:47,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:47,737 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 690 transitions. [2023-02-15 22:03:47,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:47,737 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 690 transitions. [2023-02-15 22:03:47,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 22:03:47,738 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:47,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:47,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-15 22:03:47,738 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:47,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:47,739 INFO L85 PathProgramCache]: Analyzing trace with hash -2076048724, now seen corresponding path program 1 times [2023-02-15 22:03:47,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:47,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651880944] [2023-02-15 22:03:47,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:47,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:47,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:47,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:47,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651880944] [2023-02-15 22:03:47,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651880944] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:47,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:47,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:03:47,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924091015] [2023-02-15 22:03:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:47,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:03:47,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:03:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:03:47,840 INFO L87 Difference]: Start difference. First operand 518 states and 690 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:48,039 INFO L93 Difference]: Finished difference Result 605 states and 788 transitions. [2023-02-15 22:03:48,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:03:48,039 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 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 34 [2023-02-15 22:03:48,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:48,041 INFO L225 Difference]: With dead ends: 605 [2023-02-15 22:03:48,042 INFO L226 Difference]: Without dead ends: 605 [2023-02-15 22:03:48,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 22:03:48,042 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 477 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:48,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 555 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:48,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 605 states. [2023-02-15 22:03:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 605 to 517. [2023-02-15 22:03:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 443 states have (on average 1.489841986455982) internal successors, (660), 498 states have internal predecessors, (660), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 22:03:48,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 688 transitions. [2023-02-15 22:03:48,053 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 688 transitions. Word has length 34 [2023-02-15 22:03:48,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:48,054 INFO L495 AbstractCegarLoop]: Abstraction has 517 states and 688 transitions. [2023-02-15 22:03:48,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:48,054 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 688 transitions. [2023-02-15 22:03:48,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-15 22:03:48,055 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:48,055 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:48,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-15 22:03:48,056 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:48,056 INFO L85 PathProgramCache]: Analyzing trace with hash -2076048723, now seen corresponding path program 1 times [2023-02-15 22:03:48,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:48,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310357005] [2023-02-15 22:03:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:48,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:48,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:48,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:48,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:48,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:48,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310357005] [2023-02-15 22:03:48,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310357005] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:48,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:48,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:03:48,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183098218] [2023-02-15 22:03:48,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:48,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:03:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:48,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:03:48,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:03:48,188 INFO L87 Difference]: Start difference. First operand 517 states and 688 transitions. Second operand has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:48,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:48,340 INFO L93 Difference]: Finished difference Result 541 states and 689 transitions. [2023-02-15 22:03:48,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:03:48,343 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 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 34 [2023-02-15 22:03:48,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:48,344 INFO L225 Difference]: With dead ends: 541 [2023-02-15 22:03:48,344 INFO L226 Difference]: Without dead ends: 541 [2023-02-15 22:03:48,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-15 22:03:48,345 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 507 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:48,345 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 568 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2023-02-15 22:03:48,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 516. [2023-02-15 22:03:48,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 443 states have (on average 1.4853273137697518) internal successors, (658), 497 states have internal predecessors, (658), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 22:03:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 686 transitions. [2023-02-15 22:03:48,356 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 686 transitions. Word has length 34 [2023-02-15 22:03:48,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:48,356 INFO L495 AbstractCegarLoop]: Abstraction has 516 states and 686 transitions. [2023-02-15 22:03:48,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.4) internal successors, (32), 6 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 686 transitions. [2023-02-15 22:03:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 22:03:48,357 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:48,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:48,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-15 22:03:48,358 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:48,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:48,359 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972557, now seen corresponding path program 1 times [2023-02-15 22:03:48,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:48,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921360757] [2023-02-15 22:03:48,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:48,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:48,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:48,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:48,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:48,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:48,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921360757] [2023-02-15 22:03:48,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921360757] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:48,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:48,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:03:48,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633184678] [2023-02-15 22:03:48,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:48,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 22:03:48,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:48,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 22:03:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:03:48,425 INFO L87 Difference]: Start difference. First operand 516 states and 686 transitions. Second operand has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:48,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:48,638 INFO L93 Difference]: Finished difference Result 894 states and 1136 transitions. [2023-02-15 22:03:48,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 22:03:48,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 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 36 [2023-02-15 22:03:48,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:48,641 INFO L225 Difference]: With dead ends: 894 [2023-02-15 22:03:48,641 INFO L226 Difference]: Without dead ends: 894 [2023-02-15 22:03:48,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:03:48,641 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 439 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:48,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 637 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:48,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2023-02-15 22:03:48,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 513. [2023-02-15 22:03:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 443 states have (on average 1.471783295711061) internal successors, (652), 494 states have internal predecessors, (652), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 22:03:48,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 680 transitions. [2023-02-15 22:03:48,657 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 680 transitions. Word has length 36 [2023-02-15 22:03:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:48,657 INFO L495 AbstractCegarLoop]: Abstraction has 513 states and 680 transitions. [2023-02-15 22:03:48,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.5) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 680 transitions. [2023-02-15 22:03:48,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 22:03:48,658 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:48,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:48,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-15 22:03:48,658 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:48,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:48,659 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972558, now seen corresponding path program 1 times [2023-02-15 22:03:48,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:48,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570078206] [2023-02-15 22:03:48,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:48,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:48,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:48,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:48,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570078206] [2023-02-15 22:03:48,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570078206] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:48,846 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:48,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-15 22:03:48,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361472369] [2023-02-15 22:03:48,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:48,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:03:48,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:48,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:03:48,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:03:48,847 INFO L87 Difference]: Start difference. First operand 513 states and 680 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:49,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:49,140 INFO L93 Difference]: Finished difference Result 737 states and 930 transitions. [2023-02-15 22:03:49,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:03:49,141 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 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 36 [2023-02-15 22:03:49,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:49,143 INFO L225 Difference]: With dead ends: 737 [2023-02-15 22:03:49,143 INFO L226 Difference]: Without dead ends: 737 [2023-02-15 22:03:49,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-02-15 22:03:49,144 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 536 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1100 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:49,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1100 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:49,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2023-02-15 22:03:49,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 543. [2023-02-15 22:03:49,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 474 states have (on average 1.4641350210970465) internal successors, (694), 524 states have internal predecessors, (694), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 22:03:49,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 722 transitions. [2023-02-15 22:03:49,153 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 722 transitions. Word has length 36 [2023-02-15 22:03:49,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:49,154 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 722 transitions. [2023-02-15 22:03:49,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:49,154 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 722 transitions. [2023-02-15 22:03:49,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 22:03:49,154 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:49,154 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:49,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-15 22:03:49,155 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:49,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:49,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972719, now seen corresponding path program 1 times [2023-02-15 22:03:49,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:49,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538187007] [2023-02-15 22:03:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:49,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:49,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:49,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:49,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:49,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:49,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538187007] [2023-02-15 22:03:49,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538187007] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:49,458 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:49,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-15 22:03:49,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26966853] [2023-02-15 22:03:49,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:49,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 22:03:49,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:49,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 22:03:49,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-15 22:03:49,460 INFO L87 Difference]: Start difference. First operand 543 states and 722 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:49,973 INFO L93 Difference]: Finished difference Result 885 states and 1074 transitions. [2023-02-15 22:03:49,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 22:03:49,973 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 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 36 [2023-02-15 22:03:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:49,976 INFO L225 Difference]: With dead ends: 885 [2023-02-15 22:03:49,976 INFO L226 Difference]: Without dead ends: 885 [2023-02-15 22:03:49,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:03:49,977 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 1399 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1402 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:49,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1402 Valid, 830 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:03:49,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2023-02-15 22:03:49,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 543. [2023-02-15 22:03:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 474 states have (on average 1.459915611814346) internal successors, (692), 524 states have internal predecessors, (692), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 22:03:49,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 720 transitions. [2023-02-15 22:03:49,998 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 720 transitions. Word has length 36 [2023-02-15 22:03:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:49,998 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 720 transitions. [2023-02-15 22:03:49,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 720 transitions. [2023-02-15 22:03:50,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 22:03:50,000 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:50,000 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:50,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-15 22:03:50,000 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:50,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:50,001 INFO L85 PathProgramCache]: Analyzing trace with hash -683651473, now seen corresponding path program 1 times [2023-02-15 22:03:50,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:50,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479019153] [2023-02-15 22:03:50,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:50,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:50,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:50,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:50,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2023-02-15 22:03:50,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:50,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:03:50,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:50,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479019153] [2023-02-15 22:03:50,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479019153] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:03:50,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299958466] [2023-02-15 22:03:50,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:50,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:50,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:03:50,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:03:50,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 22:03:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:50,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 22:03:50,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:03:50,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:50,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:03:50,481 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-02-15 22:03:50,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2023-02-15 22:03:50,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:03:50,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299958466] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:03:50,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:03:50,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-02-15 22:03:50,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030867697] [2023-02-15 22:03:50,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:03:50,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 22:03:50,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:50,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 22:03:50,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:03:50,519 INFO L87 Difference]: Start difference. First operand 543 states and 720 transitions. Second operand has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 22:03:51,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:51,098 INFO L93 Difference]: Finished difference Result 1805 states and 2246 transitions. [2023-02-15 22:03:51,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 22:03:51,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 46 [2023-02-15 22:03:51,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:51,104 INFO L225 Difference]: With dead ends: 1805 [2023-02-15 22:03:51,104 INFO L226 Difference]: Without dead ends: 1805 [2023-02-15 22:03:51,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-02-15 22:03:51,107 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 3440 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3442 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:51,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3442 Valid, 1032 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:03:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2023-02-15 22:03:51,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 682. [2023-02-15 22:03:51,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 682 states, 610 states have (on average 1.4049180327868853) internal successors, (857), 656 states have internal predecessors, (857), 20 states have call successors, (20), 10 states have call predecessors, (20), 10 states have return successors, (20), 15 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-15 22:03:51,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 897 transitions. [2023-02-15 22:03:51,124 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 897 transitions. Word has length 46 [2023-02-15 22:03:51,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:51,125 INFO L495 AbstractCegarLoop]: Abstraction has 682 states and 897 transitions. [2023-02-15 22:03:51,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 7.818181818181818) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 22:03:51,125 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 897 transitions. [2023-02-15 22:03:51,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 22:03:51,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:51,126 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:51,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 22:03:51,331 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,SelfDestructingSolverStorable34 [2023-02-15 22:03:51,332 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:51,332 INFO L85 PathProgramCache]: Analyzing trace with hash -274270044, now seen corresponding path program 1 times [2023-02-15 22:03:51,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:51,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20193598] [2023-02-15 22:03:51,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:51,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:51,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:51,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:51,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 22:03:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:51,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:03:51,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:51,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20193598] [2023-02-15 22:03:51,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20193598] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:03:51,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53997509] [2023-02-15 22:03:51,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:51,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:51,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:03:51,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:03:51,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 22:03:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:51,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 22:03:51,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:03:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:51,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:03:51,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:03:51,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53997509] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:03:51,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:03:51,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-15 22:03:51,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625594523] [2023-02-15 22:03:51,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:03:51,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 22:03:51,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:51,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 22:03:51,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-15 22:03:51,614 INFO L87 Difference]: Start difference. First operand 682 states and 897 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 22:03:51,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:51,679 INFO L93 Difference]: Finished difference Result 2096 states and 2795 transitions. [2023-02-15 22:03:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 22:03:51,680 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2023-02-15 22:03:51,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:51,685 INFO L225 Difference]: With dead ends: 2096 [2023-02-15 22:03:51,686 INFO L226 Difference]: Without dead ends: 2096 [2023-02-15 22:03:51,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:03:51,689 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 771 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 777 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:51,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [777 Valid, 905 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:03:51,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2096 states. [2023-02-15 22:03:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2096 to 1420. [2023-02-15 22:03:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1420 states, 1339 states have (on average 1.4241971620612397) internal successors, (1907), 1385 states have internal predecessors, (1907), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2023-02-15 22:03:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1420 states to 1420 states and 1965 transitions. [2023-02-15 22:03:51,718 INFO L78 Accepts]: Start accepts. Automaton has 1420 states and 1965 transitions. Word has length 50 [2023-02-15 22:03:51,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:51,718 INFO L495 AbstractCegarLoop]: Abstraction has 1420 states and 1965 transitions. [2023-02-15 22:03:51,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 4 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 22:03:51,718 INFO L276 IsEmpty]: Start isEmpty. Operand 1420 states and 1965 transitions. [2023-02-15 22:03:51,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 22:03:51,719 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:51,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:51,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 22:03:51,927 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,SelfDestructingSolverStorable35 [2023-02-15 22:03:51,928 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:51,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash -975334622, now seen corresponding path program 1 times [2023-02-15 22:03:51,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:51,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050526149] [2023-02-15 22:03:51,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:52,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:52,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 22:03:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:52,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:03:52,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:52,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050526149] [2023-02-15 22:03:52,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050526149] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:03:52,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118949669] [2023-02-15 22:03:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:52,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:52,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:03:52,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:03:52,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 22:03:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:52,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 22:03:52,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:03:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:52,647 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:03:52,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118949669] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:52,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:03:52,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2023-02-15 22:03:52,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153158146] [2023-02-15 22:03:52,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:52,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:03:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:03:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:03:52,650 INFO L87 Difference]: Start difference. First operand 1420 states and 1965 transitions. Second operand has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:03:52,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:52,866 INFO L93 Difference]: Finished difference Result 1832 states and 2496 transitions. [2023-02-15 22:03:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:03:52,867 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-02-15 22:03:52,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:52,872 INFO L225 Difference]: With dead ends: 1832 [2023-02-15 22:03:52,872 INFO L226 Difference]: Without dead ends: 1832 [2023-02-15 22:03:52,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-02-15 22:03:52,873 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 436 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:52,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 401 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1832 states. [2023-02-15 22:03:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1832 to 1418. [2023-02-15 22:03:52,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1418 states, 1339 states have (on average 1.4212098581030619) internal successors, (1903), 1383 states have internal predecessors, (1903), 29 states have call successors, (29), 10 states have call predecessors, (29), 10 states have return successors, (29), 24 states have call predecessors, (29), 29 states have call successors, (29) [2023-02-15 22:03:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1418 states to 1418 states and 1961 transitions. [2023-02-15 22:03:52,893 INFO L78 Accepts]: Start accepts. Automaton has 1418 states and 1961 transitions. Word has length 50 [2023-02-15 22:03:52,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:52,893 INFO L495 AbstractCegarLoop]: Abstraction has 1418 states and 1961 transitions. [2023-02-15 22:03:52,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:03:52,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1418 states and 1961 transitions. [2023-02-15 22:03:52,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 22:03:52,894 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:52,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:52,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 22:03:53,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:53,117 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:53,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1591288609, now seen corresponding path program 1 times [2023-02-15 22:03:53,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:53,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815180222] [2023-02-15 22:03:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:53,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:53,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:53,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:53,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815180222] [2023-02-15 22:03:53,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815180222] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:03:53,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680134685] [2023-02-15 22:03:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:53,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:53,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:03:53,173 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:03:53,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 22:03:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:53,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 22:03:53,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:03:53,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:53,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:03:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:53,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680134685] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:03:53,369 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:03:53,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-15 22:03:53,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835798115] [2023-02-15 22:03:53,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:03:53,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 22:03:53,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:53,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 22:03:53,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-15 22:03:53,372 INFO L87 Difference]: Start difference. First operand 1418 states and 1961 transitions. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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) [2023-02-15 22:03:53,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:53,423 INFO L93 Difference]: Finished difference Result 2460 states and 3292 transitions. [2023-02-15 22:03:53,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 22:03:53,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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) Word has length 51 [2023-02-15 22:03:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:53,436 INFO L225 Difference]: With dead ends: 2460 [2023-02-15 22:03:53,437 INFO L226 Difference]: Without dead ends: 2460 [2023-02-15 22:03:53,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:03:53,437 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 391 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:53,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 640 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:03:53,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2460 states. [2023-02-15 22:03:53,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2460 to 2143. [2023-02-15 22:03:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2143 states, 2034 states have (on average 1.396755162241888) internal successors, (2841), 2078 states have internal predecessors, (2841), 59 states have call successors, (59), 10 states have call predecessors, (59), 10 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2023-02-15 22:03:53,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2143 states to 2143 states and 2959 transitions. [2023-02-15 22:03:53,473 INFO L78 Accepts]: Start accepts. Automaton has 2143 states and 2959 transitions. Word has length 51 [2023-02-15 22:03:53,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:53,473 INFO L495 AbstractCegarLoop]: Abstraction has 2143 states and 2959 transitions. [2023-02-15 22:03:53,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 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) [2023-02-15 22:03:53,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2143 states and 2959 transitions. [2023-02-15 22:03:53,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 22:03:53,477 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:53,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:53,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 22:03:53,683 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,SelfDestructingSolverStorable37 [2023-02-15 22:03:53,684 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:53,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:53,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1004482595, now seen corresponding path program 1 times [2023-02-15 22:03:53,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:53,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628550142] [2023-02-15 22:03:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:53,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:53,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:03:53,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:53,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628550142] [2023-02-15 22:03:53,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628550142] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:03:53,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315803544] [2023-02-15 22:03:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:53,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:53,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:03:53,739 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:03:53,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 22:03:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:53,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 22:03:53,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:03:53,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:03:53,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:03:53,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:03:53,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315803544] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:03:53,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:03:53,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-02-15 22:03:53,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6329578] [2023-02-15 22:03:53,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:03:53,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:03:53,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:53,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:03:53,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 22:03:53,935 INFO L87 Difference]: Start difference. First operand 2143 states and 2959 transitions. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2023-02-15 22:03:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:53,996 INFO L93 Difference]: Finished difference Result 7414 states and 10226 transitions. [2023-02-15 22:03:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 22:03:53,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) Word has length 51 [2023-02-15 22:03:53,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:54,019 INFO L225 Difference]: With dead ends: 7414 [2023-02-15 22:03:54,019 INFO L226 Difference]: Without dead ends: 7414 [2023-02-15 22:03:54,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-15 22:03:54,021 INFO L413 NwaCegarLoop]: 200 mSDtfsCounter, 571 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 575 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:54,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [575 Valid, 997 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:03:54,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7414 states. [2023-02-15 22:03:54,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7414 to 5232. [2023-02-15 22:03:54,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5232 states, 5033 states have (on average 1.388038942976356) internal successors, (6986), 5082 states have internal predecessors, (6986), 149 states have call successors, (149), 10 states have call predecessors, (149), 10 states have return successors, (149), 139 states have call predecessors, (149), 149 states have call successors, (149) [2023-02-15 22:03:54,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5232 states to 5232 states and 7284 transitions. [2023-02-15 22:03:54,110 INFO L78 Accepts]: Start accepts. Automaton has 5232 states and 7284 transitions. Word has length 51 [2023-02-15 22:03:54,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:54,110 INFO L495 AbstractCegarLoop]: Abstraction has 5232 states and 7284 transitions. [2023-02-15 22:03:54,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 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) [2023-02-15 22:03:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand 5232 states and 7284 transitions. [2023-02-15 22:03:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 22:03:54,114 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:54,115 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:54,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 22:03:54,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-15 22:03:54,321 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:54,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:54,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1684540965, now seen corresponding path program 1 times [2023-02-15 22:03:54,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:54,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884043280] [2023-02-15 22:03:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:54,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:54,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:54,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:54,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884043280] [2023-02-15 22:03:54,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884043280] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:54,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:03:54,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:03:54,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302165620] [2023-02-15 22:03:54,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:54,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:03:54,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:54,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:03:54,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:54,427 INFO L87 Difference]: Start difference. First operand 5232 states and 7284 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:54,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:54,454 INFO L93 Difference]: Finished difference Result 6156 states and 8683 transitions. [2023-02-15 22:03:54,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:03:54,455 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-02-15 22:03:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:54,465 INFO L225 Difference]: With dead ends: 6156 [2023-02-15 22:03:54,465 INFO L226 Difference]: Without dead ends: 6156 [2023-02-15 22:03:54,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:03:54,466 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 150 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:54,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 698 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:03:54,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6156 states. [2023-02-15 22:03:54,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6156 to 4993. [2023-02-15 22:03:54,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4993 states, 4808 states have (on average 1.396630615640599) internal successors, (6715), 4857 states have internal predecessors, (6715), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2023-02-15 22:03:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4993 states to 4993 states and 6987 transitions. [2023-02-15 22:03:54,538 INFO L78 Accepts]: Start accepts. Automaton has 4993 states and 6987 transitions. Word has length 51 [2023-02-15 22:03:54,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:54,538 INFO L495 AbstractCegarLoop]: Abstraction has 4993 states and 6987 transitions. [2023-02-15 22:03:54,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:54,539 INFO L276 IsEmpty]: Start isEmpty. Operand 4993 states and 6987 transitions. [2023-02-15 22:03:54,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 22:03:54,540 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:54,540 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:54,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-02-15 22:03:54,540 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:54,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:54,541 INFO L85 PathProgramCache]: Analyzing trace with hash 530896578, now seen corresponding path program 1 times [2023-02-15 22:03:54,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:54,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136802516] [2023-02-15 22:03:54,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:54,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:54,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:54,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:54,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136802516] [2023-02-15 22:03:54,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136802516] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:03:54,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889941880] [2023-02-15 22:03:54,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:54,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:54,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:03:54,965 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:03:54,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 22:03:55,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:55,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 22:03:55,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:03:55,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:55,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:03:55,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889941880] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:55,328 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:03:55,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 14 [2023-02-15 22:03:55,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040094095] [2023-02-15 22:03:55,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:55,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:03:55,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:55,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:03:55,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:03:55,330 INFO L87 Difference]: Start difference. First operand 4993 states and 6987 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:55,496 INFO L93 Difference]: Finished difference Result 5041 states and 7018 transitions. [2023-02-15 22:03:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 22:03:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-02-15 22:03:55,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:55,506 INFO L225 Difference]: With dead ends: 5041 [2023-02-15 22:03:55,506 INFO L226 Difference]: Without dead ends: 5041 [2023-02-15 22:03:55,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2023-02-15 22:03:55,506 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 481 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:55,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 383 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5041 states. [2023-02-15 22:03:55,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5041 to 4995. [2023-02-15 22:03:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4995 states, 4810 states have (on average 1.3966735966735966) internal successors, (6718), 4859 states have internal predecessors, (6718), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2023-02-15 22:03:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4995 states to 4995 states and 6990 transitions. [2023-02-15 22:03:55,572 INFO L78 Accepts]: Start accepts. Automaton has 4995 states and 6990 transitions. Word has length 51 [2023-02-15 22:03:55,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:55,572 INFO L495 AbstractCegarLoop]: Abstraction has 4995 states and 6990 transitions. [2023-02-15 22:03:55,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 4995 states and 6990 transitions. [2023-02-15 22:03:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 22:03:55,574 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:55,574 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:55,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 22:03:55,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:55,780 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:55,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:55,781 INFO L85 PathProgramCache]: Analyzing trace with hash 530896640, now seen corresponding path program 1 times [2023-02-15 22:03:55,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:55,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504213754] [2023-02-15 22:03:55,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:55,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:55,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:56,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:56,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:56,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:56,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504213754] [2023-02-15 22:03:56,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504213754] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:03:56,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983427200] [2023-02-15 22:03:56,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:56,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:56,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:03:56,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:03:56,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 22:03:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:56,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-15 22:03:56,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:03:56,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:56,477 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:03:56,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983427200] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:56,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:03:56,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 12 [2023-02-15 22:03:56,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971813150] [2023-02-15 22:03:56,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:56,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:03:56,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:56,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:03:56,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-02-15 22:03:56,479 INFO L87 Difference]: Start difference. First operand 4995 states and 6990 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:56,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:56,651 INFO L93 Difference]: Finished difference Result 5040 states and 7016 transitions. [2023-02-15 22:03:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:03:56,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2023-02-15 22:03:56,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:56,660 INFO L225 Difference]: With dead ends: 5040 [2023-02-15 22:03:56,660 INFO L226 Difference]: Without dead ends: 5040 [2023-02-15 22:03:56,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:03:56,661 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 366 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:56,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 444 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:03:56,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5040 states. [2023-02-15 22:03:56,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 4992. [2023-02-15 22:03:56,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4992 states, 4808 states have (on average 1.3962146422628952) internal successors, (6713), 4856 states have internal predecessors, (6713), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2023-02-15 22:03:56,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4992 states to 4992 states and 6985 transitions. [2023-02-15 22:03:56,748 INFO L78 Accepts]: Start accepts. Automaton has 4992 states and 6985 transitions. Word has length 51 [2023-02-15 22:03:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:56,749 INFO L495 AbstractCegarLoop]: Abstraction has 4992 states and 6985 transitions. [2023-02-15 22:03:56,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 5 states have internal predecessors, (49), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:03:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 4992 states and 6985 transitions. [2023-02-15 22:03:56,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 22:03:56,750 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:56,750 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:56,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 22:03:56,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:56,957 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:56,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:56,957 INFO L85 PathProgramCache]: Analyzing trace with hash -993697117, now seen corresponding path program 1 times [2023-02-15 22:03:56,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:56,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083993061] [2023-02-15 22:03:56,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:56,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:57,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:03:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:57,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-15 22:03:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:57,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:03:57,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:57,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083993061] [2023-02-15 22:03:57,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083993061] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:03:57,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60886545] [2023-02-15 22:03:57,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:57,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:57,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:03:57,223 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:03:57,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 22:03:57,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:57,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 22:03:57,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:03:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:57,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:03:57,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60886545] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:03:57,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:03:57,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 14 [2023-02-15 22:03:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772383690] [2023-02-15 22:03:57,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:03:57,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 22:03:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 22:03:57,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:03:57,583 INFO L87 Difference]: Start difference. First operand 4992 states and 6985 transitions. Second operand has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:03:57,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:57,857 INFO L93 Difference]: Finished difference Result 5141 states and 7123 transitions. [2023-02-15 22:03:57,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:03:57,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2023-02-15 22:03:57,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:57,866 INFO L225 Difference]: With dead ends: 5141 [2023-02-15 22:03:57,867 INFO L226 Difference]: Without dead ends: 5141 [2023-02-15 22:03:57,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-02-15 22:03:57,868 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 445 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:57,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 477 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:03:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5141 states. [2023-02-15 22:03:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5141 to 4991. [2023-02-15 22:03:57,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4991 states, 4808 states have (on average 1.38914309484193) internal successors, (6679), 4855 states have internal predecessors, (6679), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2023-02-15 22:03:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4991 states to 4991 states and 6951 transitions. [2023-02-15 22:03:57,929 INFO L78 Accepts]: Start accepts. Automaton has 4991 states and 6951 transitions. Word has length 52 [2023-02-15 22:03:57,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:57,929 INFO L495 AbstractCegarLoop]: Abstraction has 4991 states and 6951 transitions. [2023-02-15 22:03:57,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.0) internal successors, (48), 6 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:03:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 4991 states and 6951 transitions. [2023-02-15 22:03:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 22:03:57,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:57,931 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:57,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 22:03:58,137 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,SelfDestructingSolverStorable42 [2023-02-15 22:03:58,137 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:58,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:58,138 INFO L85 PathProgramCache]: Analyzing trace with hash 745592269, now seen corresponding path program 1 times [2023-02-15 22:03:58,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:58,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273756235] [2023-02-15 22:03:58,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:58,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:58,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:58,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:03:58,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:58,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273756235] [2023-02-15 22:03:58,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273756235] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:03:58,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796306411] [2023-02-15 22:03:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:58,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:58,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:03:58,271 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:03:58,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 22:03:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:58,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 22:03:58,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:03:58,631 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:03:58,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2023-02-15 22:03:58,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:03:58,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:03:58,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:03:58,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796306411] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:03:58,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:03:58,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 15 [2023-02-15 22:03:58,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289161651] [2023-02-15 22:03:58,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:03:58,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 22:03:58,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:03:58,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 22:03:58,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:03:58,844 INFO L87 Difference]: Start difference. First operand 4991 states and 6951 transitions. Second operand has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 22:03:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:03:59,569 INFO L93 Difference]: Finished difference Result 6584 states and 9255 transitions. [2023-02-15 22:03:59,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 22:03:59,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 52 [2023-02-15 22:03:59,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:03:59,581 INFO L225 Difference]: With dead ends: 6584 [2023-02-15 22:03:59,581 INFO L226 Difference]: Without dead ends: 6577 [2023-02-15 22:03:59,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-02-15 22:03:59,582 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 527 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1863 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:03:59,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 1863 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:03:59,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6577 states. [2023-02-15 22:03:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6577 to 5036. [2023-02-15 22:03:59,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5036 states, 4853 states have (on average 1.38512260457449) internal successors, (6722), 4900 states have internal predecessors, (6722), 136 states have call successors, (136), 9 states have call predecessors, (136), 9 states have return successors, (136), 126 states have call predecessors, (136), 136 states have call successors, (136) [2023-02-15 22:03:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5036 states to 5036 states and 6994 transitions. [2023-02-15 22:03:59,649 INFO L78 Accepts]: Start accepts. Automaton has 5036 states and 6994 transitions. Word has length 52 [2023-02-15 22:03:59,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:03:59,649 INFO L495 AbstractCegarLoop]: Abstraction has 5036 states and 6994 transitions. [2023-02-15 22:03:59,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.866666666666667) internal successors, (148), 15 states have internal predecessors, (148), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 22:03:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 5036 states and 6994 transitions. [2023-02-15 22:03:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 22:03:59,650 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:03:59,650 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:03:59,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 22:03:59,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:59,857 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:03:59,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:03:59,858 INFO L85 PathProgramCache]: Analyzing trace with hash -599836525, now seen corresponding path program 1 times [2023-02-15 22:03:59,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:03:59,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302289724] [2023-02-15 22:03:59,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:59,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:03:59,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:59,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 22:03:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:59,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 22:03:59,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:03:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:03:59,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:03:59,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302289724] [2023-02-15 22:03:59,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302289724] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:03:59,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003925906] [2023-02-15 22:03:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:03:59,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:03:59,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:03:59,988 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:03:59,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 22:04:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:00,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 22:04:00,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:00,211 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:04:00,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 22:04:00,215 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:04:00,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 22:04:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:04:00,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:04:00,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003925906] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:00,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:04:00,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2023-02-15 22:04:00,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356703639] [2023-02-15 22:04:00,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:00,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 22:04:00,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:00,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 22:04:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:04:00,268 INFO L87 Difference]: Start difference. First operand 5036 states and 6994 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:04:00,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:00,620 INFO L93 Difference]: Finished difference Result 4145 states and 5813 transitions. [2023-02-15 22:04:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 22:04:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2023-02-15 22:04:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:00,635 INFO L225 Difference]: With dead ends: 4145 [2023-02-15 22:04:00,635 INFO L226 Difference]: Without dead ends: 4145 [2023-02-15 22:04:00,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2023-02-15 22:04:00,637 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 306 mSDsluCounter, 1137 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:00,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1376 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:04:00,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4145 states. [2023-02-15 22:04:00,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4145 to 3445. [2023-02-15 22:04:00,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3445 states, 3327 states have (on average 1.4171926660655245) internal successors, (4715), 3364 states have internal predecessors, (4715), 76 states have call successors, (76), 4 states have call predecessors, (76), 4 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-02-15 22:04:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3445 states to 3445 states and 4867 transitions. [2023-02-15 22:04:00,688 INFO L78 Accepts]: Start accepts. Automaton has 3445 states and 4867 transitions. Word has length 54 [2023-02-15 22:04:00,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:00,688 INFO L495 AbstractCegarLoop]: Abstraction has 3445 states and 4867 transitions. [2023-02-15 22:04:00,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 7 states have internal predecessors, (49), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:04:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 3445 states and 4867 transitions. [2023-02-15 22:04:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-15 22:04:00,690 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:00,690 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:00,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 22:04:00,896 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,SelfDestructingSolverStorable44 [2023-02-15 22:04:00,896 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:00,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:00,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1870600004, now seen corresponding path program 1 times [2023-02-15 22:04:00,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:00,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855596520] [2023-02-15 22:04:00,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:00,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:01,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:01,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:01,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855596520] [2023-02-15 22:04:01,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855596520] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:01,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:01,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-15 22:04:01,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143240508] [2023-02-15 22:04:01,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:01,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 22:04:01,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:01,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 22:04:01,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:04:01,844 INFO L87 Difference]: Start difference. First operand 3445 states and 4867 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:02,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:02,470 INFO L93 Difference]: Finished difference Result 3490 states and 4913 transitions. [2023-02-15 22:04:02,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 22:04:02,471 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-02-15 22:04:02,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:02,476 INFO L225 Difference]: With dead ends: 3490 [2023-02-15 22:04:02,476 INFO L226 Difference]: Without dead ends: 3490 [2023-02-15 22:04:02,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-15 22:04:02,477 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 109 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 988 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:02,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 988 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 22:04:02,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3490 states. [2023-02-15 22:04:02,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3490 to 3479. [2023-02-15 22:04:02,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 3361 states have (on average 1.4132698601606664) internal successors, (4750), 3398 states have internal predecessors, (4750), 76 states have call successors, (76), 4 states have call predecessors, (76), 4 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-02-15 22:04:02,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 4902 transitions. [2023-02-15 22:04:02,525 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 4902 transitions. Word has length 54 [2023-02-15 22:04:02,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:02,525 INFO L495 AbstractCegarLoop]: Abstraction has 3479 states and 4902 transitions. [2023-02-15 22:04:02,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 10 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:02,526 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 4902 transitions. [2023-02-15 22:04:02,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 22:04:02,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:02,527 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:02,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2023-02-15 22:04:02,527 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:02,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:02,528 INFO L85 PathProgramCache]: Analyzing trace with hash 652010731, now seen corresponding path program 1 times [2023-02-15 22:04:02,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:02,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619200843] [2023-02-15 22:04:02,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:02,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:03,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:03,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:03,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:03,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619200843] [2023-02-15 22:04:03,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619200843] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:03,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608005708] [2023-02-15 22:04:03,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:03,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:03,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:03,264 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:04:03,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 22:04:03,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:03,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-15 22:04:03,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:03,441 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-02-15 22:04:03,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-02-15 22:04:03,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 22:04:03,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 22:04:03,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:04:03,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-15 22:04:03,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:04:03,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-15 22:04:03,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 22:04:03,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 22:04:03,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 22:04:03,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 22:04:03,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:03,853 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:04:03,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608005708] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:03,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:04:03,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 26 [2023-02-15 22:04:03,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508383857] [2023-02-15 22:04:03,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:03,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 22:04:03,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:03,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 22:04:03,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2023-02-15 22:04:03,855 INFO L87 Difference]: Start difference. First operand 3479 states and 4902 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:04,522 INFO L93 Difference]: Finished difference Result 5187 states and 7365 transitions. [2023-02-15 22:04:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 22:04:04,522 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 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 55 [2023-02-15 22:04:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:04,530 INFO L225 Difference]: With dead ends: 5187 [2023-02-15 22:04:04,531 INFO L226 Difference]: Without dead ends: 5187 [2023-02-15 22:04:04,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 22:04:04,532 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 655 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:04,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 1252 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:04:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5187 states. [2023-02-15 22:04:04,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5187 to 3534. [2023-02-15 22:04:04,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3534 states, 3416 states have (on average 1.4057377049180328) internal successors, (4802), 3453 states have internal predecessors, (4802), 76 states have call successors, (76), 4 states have call predecessors, (76), 4 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2023-02-15 22:04:04,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3534 states to 3534 states and 4954 transitions. [2023-02-15 22:04:04,595 INFO L78 Accepts]: Start accepts. Automaton has 3534 states and 4954 transitions. Word has length 55 [2023-02-15 22:04:04,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:04,595 INFO L495 AbstractCegarLoop]: Abstraction has 3534 states and 4954 transitions. [2023-02-15 22:04:04,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:04,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3534 states and 4954 transitions. [2023-02-15 22:04:04,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 22:04:04,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:04,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:04,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 22:04:04,804 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,SelfDestructingSolverStorable46 [2023-02-15 22:04:04,804 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:04,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:04,805 INFO L85 PathProgramCache]: Analyzing trace with hash 528923948, now seen corresponding path program 1 times [2023-02-15 22:04:04,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:04,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657367183] [2023-02-15 22:04:04,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:04,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:05,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:05,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:05,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:05,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657367183] [2023-02-15 22:04:05,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657367183] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:05,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:05,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-02-15 22:04:05,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268515245] [2023-02-15 22:04:05,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:05,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 22:04:05,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:05,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 22:04:05,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-15 22:04:05,573 INFO L87 Difference]: Start difference. First operand 3534 states and 4954 transitions. Second operand has 17 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:06,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:06,970 INFO L93 Difference]: Finished difference Result 5904 states and 8431 transitions. [2023-02-15 22:04:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 22:04:06,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 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 56 [2023-02-15 22:04:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:06,979 INFO L225 Difference]: With dead ends: 5904 [2023-02-15 22:04:06,979 INFO L226 Difference]: Without dead ends: 5904 [2023-02-15 22:04:06,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=282, Invalid=908, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 22:04:06,980 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 1624 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1625 SdHoareTripleChecker+Valid, 1368 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:06,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1625 Valid, 1368 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 22:04:06,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5904 states. [2023-02-15 22:04:07,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5904 to 4235. [2023-02-15 22:04:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4235 states, 4063 states have (on average 1.3972434161949299) internal successors, (5677), 4123 states have internal predecessors, (5677), 128 states have call successors, (128), 7 states have call predecessors, (128), 7 states have return successors, (128), 104 states have call predecessors, (128), 128 states have call successors, (128) [2023-02-15 22:04:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4235 states to 4235 states and 5933 transitions. [2023-02-15 22:04:07,037 INFO L78 Accepts]: Start accepts. Automaton has 4235 states and 5933 transitions. Word has length 56 [2023-02-15 22:04:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:07,037 INFO L495 AbstractCegarLoop]: Abstraction has 4235 states and 5933 transitions. [2023-02-15 22:04:07,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:07,037 INFO L276 IsEmpty]: Start isEmpty. Operand 4235 states and 5933 transitions. [2023-02-15 22:04:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 22:04:07,038 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:07,038 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:07,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-02-15 22:04:07,038 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:07,039 INFO L85 PathProgramCache]: Analyzing trace with hash 528923949, now seen corresponding path program 1 times [2023-02-15 22:04:07,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:07,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925663001] [2023-02-15 22:04:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:07,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:08,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:08,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:08,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925663001] [2023-02-15 22:04:08,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925663001] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:08,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:08,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-15 22:04:08,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823812985] [2023-02-15 22:04:08,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:08,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 22:04:08,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:08,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 22:04:08,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:04:08,165 INFO L87 Difference]: Start difference. First operand 4235 states and 5933 transitions. Second operand has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:09,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:09,133 INFO L93 Difference]: Finished difference Result 5658 states and 8045 transitions. [2023-02-15 22:04:09,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 22:04:09,134 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (1), 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 56 [2023-02-15 22:04:09,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:09,142 INFO L225 Difference]: With dead ends: 5658 [2023-02-15 22:04:09,142 INFO L226 Difference]: Without dead ends: 5658 [2023-02-15 22:04:09,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2023-02-15 22:04:09,143 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 1372 mSDsluCounter, 906 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1373 SdHoareTripleChecker+Valid, 1039 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:09,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1373 Valid, 1039 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:04:09,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5658 states. [2023-02-15 22:04:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5658 to 4480. [2023-02-15 22:04:09,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 4294 states have (on average 1.3945039590125756) internal successors, (5988), 4356 states have internal predecessors, (5988), 141 states have call successors, (141), 8 states have call predecessors, (141), 8 states have return successors, (141), 115 states have call predecessors, (141), 141 states have call successors, (141) [2023-02-15 22:04:09,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 6270 transitions. [2023-02-15 22:04:09,224 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 6270 transitions. Word has length 56 [2023-02-15 22:04:09,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:09,225 INFO L495 AbstractCegarLoop]: Abstraction has 4480 states and 6270 transitions. [2023-02-15 22:04:09,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:09,225 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 6270 transitions. [2023-02-15 22:04:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 22:04:09,226 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:09,226 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:09,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-02-15 22:04:09,226 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:09,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash 530770990, now seen corresponding path program 1 times [2023-02-15 22:04:09,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:09,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072486676] [2023-02-15 22:04:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:09,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:09,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:09,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:09,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:09,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072486676] [2023-02-15 22:04:09,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072486676] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:09,594 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:09,594 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-15 22:04:09,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824223443] [2023-02-15 22:04:09,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:09,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 22:04:09,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:09,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 22:04:09,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-15 22:04:09,595 INFO L87 Difference]: Start difference. First operand 4480 states and 6270 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:10,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:10,076 INFO L93 Difference]: Finished difference Result 7462 states and 10543 transitions. [2023-02-15 22:04:10,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 22:04:10,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 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 56 [2023-02-15 22:04:10,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:10,087 INFO L225 Difference]: With dead ends: 7462 [2023-02-15 22:04:10,087 INFO L226 Difference]: Without dead ends: 7462 [2023-02-15 22:04:10,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-15 22:04:10,088 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 1012 mSDsluCounter, 1003 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:10,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1014 Valid, 1150 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 22:04:10,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2023-02-15 22:04:10,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 5717. [2023-02-15 22:04:10,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5717 states, 5421 states have (on average 1.3746541228555618) internal successors, (7452), 5531 states have internal predecessors, (7452), 245 states have call successors, (245), 14 states have call predecessors, (245), 14 states have return successors, (245), 171 states have call predecessors, (245), 245 states have call successors, (245) [2023-02-15 22:04:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5717 states to 5717 states and 7942 transitions. [2023-02-15 22:04:10,194 INFO L78 Accepts]: Start accepts. Automaton has 5717 states and 7942 transitions. Word has length 56 [2023-02-15 22:04:10,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:10,195 INFO L495 AbstractCegarLoop]: Abstraction has 5717 states and 7942 transitions. [2023-02-15 22:04:10,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:10,195 INFO L276 IsEmpty]: Start isEmpty. Operand 5717 states and 7942 transitions. [2023-02-15 22:04:10,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 22:04:10,196 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:10,196 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:10,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-02-15 22:04:10,197 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:10,197 INFO L85 PathProgramCache]: Analyzing trace with hash 530770991, now seen corresponding path program 1 times [2023-02-15 22:04:10,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:10,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864891574] [2023-02-15 22:04:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:10,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:10,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:10,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:10,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864891574] [2023-02-15 22:04:10,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864891574] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:10,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072180065] [2023-02-15 22:04:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:10,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:10,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:10,739 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:04:10,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 22:04:10,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:10,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 22:04:10,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:10,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:04:11,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 22:04:11,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 22:04:11,650 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:04:11,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-02-15 22:04:11,655 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:04:11,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-02-15 22:04:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:11,711 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:04:11,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072180065] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:11,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:04:11,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-02-15 22:04:11,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125554128] [2023-02-15 22:04:11,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:11,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 22:04:11,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 22:04:11,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-02-15 22:04:11,713 INFO L87 Difference]: Start difference. First operand 5717 states and 7942 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:12,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:12,437 INFO L93 Difference]: Finished difference Result 7916 states and 11192 transitions. [2023-02-15 22:04:12,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 22:04:12,438 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 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 56 [2023-02-15 22:04:12,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:12,450 INFO L225 Difference]: With dead ends: 7916 [2023-02-15 22:04:12,450 INFO L226 Difference]: Without dead ends: 7916 [2023-02-15 22:04:12,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2023-02-15 22:04:12,451 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1528 mSDsluCounter, 710 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 853 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:12,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1528 Valid, 853 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:04:12,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7916 states. [2023-02-15 22:04:12,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7916 to 5956. [2023-02-15 22:04:12,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5956 states, 5646 states have (on average 1.373538788522848) internal successors, (7755), 5758 states have internal predecessors, (7755), 258 states have call successors, (258), 15 states have call predecessors, (258), 15 states have return successors, (258), 182 states have call predecessors, (258), 258 states have call successors, (258) [2023-02-15 22:04:12,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5956 states to 5956 states and 8271 transitions. [2023-02-15 22:04:12,541 INFO L78 Accepts]: Start accepts. Automaton has 5956 states and 8271 transitions. Word has length 56 [2023-02-15 22:04:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:12,542 INFO L495 AbstractCegarLoop]: Abstraction has 5956 states and 8271 transitions. [2023-02-15 22:04:12,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:12,542 INFO L276 IsEmpty]: Start isEmpty. Operand 5956 states and 8271 transitions. [2023-02-15 22:04:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 22:04:12,544 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:12,544 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:12,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 22:04:12,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:12,751 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:12,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:12,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1776354176, now seen corresponding path program 1 times [2023-02-15 22:04:12,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:12,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430263305] [2023-02-15 22:04:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:12,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:13,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:13,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 22:04:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:13,442 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:04:13,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:13,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430263305] [2023-02-15 22:04:13,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430263305] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:13,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963826112] [2023-02-15 22:04:13,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:13,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:13,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:13,444 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:04:13,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 22:04:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:13,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 61 conjunts are in the unsatisfiable core [2023-02-15 22:04:13,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:13,823 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 22:04:13,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:04:13,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2023-02-15 22:04:13,999 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2023-02-15 22:04:13,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2023-02-15 22:04:14,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-15 22:04:14,055 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:14,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:14,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963826112] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:14,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:04:14,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2023-02-15 22:04:14,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249587496] [2023-02-15 22:04:14,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:14,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 22:04:14,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:14,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 22:04:14,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-02-15 22:04:14,136 INFO L87 Difference]: Start difference. First operand 5956 states and 8271 transitions. Second operand has 22 states, 21 states have (on average 5.0) internal successors, (105), 20 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 22:04:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:15,127 INFO L93 Difference]: Finished difference Result 7674 states and 10803 transitions. [2023-02-15 22:04:15,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 22:04:15,127 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 5.0) internal successors, (105), 20 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2023-02-15 22:04:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:15,135 INFO L225 Difference]: With dead ends: 7674 [2023-02-15 22:04:15,135 INFO L226 Difference]: Without dead ends: 7674 [2023-02-15 22:04:15,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 22:04:15,136 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 1246 mSDsluCounter, 1949 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1249 SdHoareTripleChecker+Valid, 2091 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:15,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1249 Valid, 2091 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 22:04:15,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7674 states. [2023-02-15 22:04:15,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7674 to 6196. [2023-02-15 22:04:15,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6196 states, 5886 states have (on average 1.3710499490316004) internal successors, (8070), 5974 states have internal predecessors, (8070), 258 states have call successors, (258), 15 states have call predecessors, (258), 15 states have return successors, (258), 206 states have call predecessors, (258), 258 states have call successors, (258) [2023-02-15 22:04:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6196 states to 6196 states and 8586 transitions. [2023-02-15 22:04:15,221 INFO L78 Accepts]: Start accepts. Automaton has 6196 states and 8586 transitions. Word has length 57 [2023-02-15 22:04:15,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:15,221 INFO L495 AbstractCegarLoop]: Abstraction has 6196 states and 8586 transitions. [2023-02-15 22:04:15,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 5.0) internal successors, (105), 20 states have internal predecessors, (105), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 22:04:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 6196 states and 8586 transitions. [2023-02-15 22:04:15,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 22:04:15,223 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:15,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:15,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 22:04:15,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-02-15 22:04:15,430 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:15,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:15,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1776354177, now seen corresponding path program 1 times [2023-02-15 22:04:15,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:15,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13744301] [2023-02-15 22:04:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:15,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:15,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:16,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:16,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 22:04:16,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:04:16,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:16,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13744301] [2023-02-15 22:04:16,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13744301] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:16,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103386106] [2023-02-15 22:04:16,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:16,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:16,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:16,397 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:04:16,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 22:04:16,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:16,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-15 22:04:16,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:16,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-02-15 22:04:16,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 22:04:16,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 22:04:17,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:04:17,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-15 22:04:17,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:04:17,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2023-02-15 22:04:17,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:04:17,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-02-15 22:04:17,239 INFO L321 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2023-02-15 22:04:17,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2023-02-15 22:04:17,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-15 22:04:17,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-02-15 22:04:17,383 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:17,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:23,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103386106] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:23,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:04:23,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2023-02-15 22:04:23,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336807868] [2023-02-15 22:04:23,071 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:23,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 22:04:23,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:23,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 22:04:23,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2023-02-15 22:04:23,072 INFO L87 Difference]: Start difference. First operand 6196 states and 8586 transitions. Second operand has 27 states, 26 states have (on average 4.076923076923077) internal successors, (106), 25 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 22:04:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:25,069 INFO L93 Difference]: Finished difference Result 8556 states and 12121 transitions. [2023-02-15 22:04:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 22:04:25,069 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.076923076923077) internal successors, (106), 25 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 57 [2023-02-15 22:04:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:25,078 INFO L225 Difference]: With dead ends: 8556 [2023-02-15 22:04:25,078 INFO L226 Difference]: Without dead ends: 8556 [2023-02-15 22:04:25,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=542, Invalid=2428, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 22:04:25,079 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 3076 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 1451 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3077 SdHoareTripleChecker+Valid, 1754 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:25,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3077 Valid, 1754 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1451 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 22:04:25,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8556 states. [2023-02-15 22:04:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8556 to 6216. [2023-02-15 22:04:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6216 states, 5906 states have (on average 1.3669150016931935) internal successors, (8073), 5992 states have internal predecessors, (8073), 258 states have call successors, (258), 15 states have call predecessors, (258), 15 states have return successors, (258), 208 states have call predecessors, (258), 258 states have call successors, (258) [2023-02-15 22:04:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6216 states to 6216 states and 8589 transitions. [2023-02-15 22:04:25,164 INFO L78 Accepts]: Start accepts. Automaton has 6216 states and 8589 transitions. Word has length 57 [2023-02-15 22:04:25,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:25,165 INFO L495 AbstractCegarLoop]: Abstraction has 6216 states and 8589 transitions. [2023-02-15 22:04:25,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.076923076923077) internal successors, (106), 25 states have internal predecessors, (106), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 22:04:25,165 INFO L276 IsEmpty]: Start isEmpty. Operand 6216 states and 8589 transitions. [2023-02-15 22:04:25,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-15 22:04:25,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:25,166 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:25,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 22:04:25,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:25,373 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:25,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:25,374 INFO L85 PathProgramCache]: Analyzing trace with hash -783228031, now seen corresponding path program 1 times [2023-02-15 22:04:25,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:25,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913481034] [2023-02-15 22:04:25,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:25,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:25,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:25,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:25,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:25,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913481034] [2023-02-15 22:04:25,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913481034] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:25,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706342193] [2023-02-15 22:04:25,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:25,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:25,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:25,429 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:04:25,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 22:04:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:25,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 22:04:25,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:25,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:25,626 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:04:25,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706342193] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:25,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:04:25,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-02-15 22:04:25,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52788674] [2023-02-15 22:04:25,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:25,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:04:25,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:25,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:04:25,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:04:25,628 INFO L87 Difference]: Start difference. First operand 6216 states and 8589 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:25,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:25,658 INFO L93 Difference]: Finished difference Result 7180 states and 9853 transitions. [2023-02-15 22:04:25,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:04:25,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 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 57 [2023-02-15 22:04:25,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:25,669 INFO L225 Difference]: With dead ends: 7180 [2023-02-15 22:04:25,669 INFO L226 Difference]: Without dead ends: 7180 [2023-02-15 22:04:25,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:04:25,670 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 230 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:25,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 357 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:04:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7180 states. [2023-02-15 22:04:25,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7180 to 6746. [2023-02-15 22:04:25,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6746 states, 6418 states have (on average 1.3603926456840136) internal successors, (8731), 6504 states have internal predecessors, (8731), 276 states have call successors, (276), 15 states have call predecessors, (276), 15 states have return successors, (276), 226 states have call predecessors, (276), 276 states have call successors, (276) [2023-02-15 22:04:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6746 states to 6746 states and 9283 transitions. [2023-02-15 22:04:25,751 INFO L78 Accepts]: Start accepts. Automaton has 6746 states and 9283 transitions. Word has length 57 [2023-02-15 22:04:25,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:25,752 INFO L495 AbstractCegarLoop]: Abstraction has 6746 states and 9283 transitions. [2023-02-15 22:04:25,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:25,752 INFO L276 IsEmpty]: Start isEmpty. Operand 6746 states and 9283 transitions. [2023-02-15 22:04:25,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-15 22:04:25,753 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:25,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:25,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 22:04:25,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:25,960 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:25,960 INFO L85 PathProgramCache]: Analyzing trace with hash 355545581, now seen corresponding path program 1 times [2023-02-15 22:04:25,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:25,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516026946] [2023-02-15 22:04:25,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:25,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:25,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:26,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:26,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-15 22:04:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:26,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 22:04:26,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:26,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516026946] [2023-02-15 22:04:26,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516026946] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:26,871 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:26,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-15 22:04:26,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540559116] [2023-02-15 22:04:26,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:26,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 22:04:26,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:26,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 22:04:26,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-02-15 22:04:26,872 INFO L87 Difference]: Start difference. First operand 6746 states and 9283 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:04:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:28,646 INFO L93 Difference]: Finished difference Result 12124 states and 17006 transitions. [2023-02-15 22:04:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 22:04:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 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 58 [2023-02-15 22:04:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:28,662 INFO L225 Difference]: With dead ends: 12124 [2023-02-15 22:04:28,662 INFO L226 Difference]: Without dead ends: 12110 [2023-02-15 22:04:28,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 22:04:28,663 INFO L413 NwaCegarLoop]: 232 mSDtfsCounter, 1680 mSDsluCounter, 2208 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:28,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1680 Valid, 2440 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 22:04:28,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12110 states. [2023-02-15 22:04:28,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12110 to 6491. [2023-02-15 22:04:28,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6491 states, 6177 states have (on average 1.3561599481949167) internal successors, (8377), 6261 states have internal predecessors, (8377), 263 states have call successors, (263), 14 states have call predecessors, (263), 14 states have return successors, (263), 215 states have call predecessors, (263), 263 states have call successors, (263) [2023-02-15 22:04:28,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6491 states to 6491 states and 8903 transitions. [2023-02-15 22:04:28,762 INFO L78 Accepts]: Start accepts. Automaton has 6491 states and 8903 transitions. Word has length 58 [2023-02-15 22:04:28,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:28,762 INFO L495 AbstractCegarLoop]: Abstraction has 6491 states and 8903 transitions. [2023-02-15 22:04:28,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:04:28,763 INFO L276 IsEmpty]: Start isEmpty. Operand 6491 states and 8903 transitions. [2023-02-15 22:04:28,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 22:04:28,764 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:28,764 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:28,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-02-15 22:04:28,764 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:28,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:28,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1061403003, now seen corresponding path program 1 times [2023-02-15 22:04:28,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:28,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646992530] [2023-02-15 22:04:28,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:28,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:28,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:29,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:29,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:29,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:29,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646992530] [2023-02-15 22:04:29,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646992530] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:29,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:29,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-02-15 22:04:29,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82628438] [2023-02-15 22:04:29,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:29,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 22:04:29,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:29,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 22:04:29,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 22:04:29,706 INFO L87 Difference]: Start difference. First operand 6491 states and 8903 transitions. Second operand has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:31,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:31,213 INFO L93 Difference]: Finished difference Result 11792 states and 16272 transitions. [2023-02-15 22:04:31,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 22:04:31,214 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (1), 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 59 [2023-02-15 22:04:31,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:31,229 INFO L225 Difference]: With dead ends: 11792 [2023-02-15 22:04:31,230 INFO L226 Difference]: Without dead ends: 11792 [2023-02-15 22:04:31,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=293, Invalid=1113, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 22:04:31,231 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 1794 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1797 SdHoareTripleChecker+Valid, 1605 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:31,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1797 Valid, 1605 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 22:04:31,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11792 states. [2023-02-15 22:04:31,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11792 to 8412. [2023-02-15 22:04:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8412 states, 7966 states have (on average 1.3415767009791615) internal successors, (10687), 8100 states have internal predecessors, (10687), 388 states have call successors, (388), 21 states have call predecessors, (388), 21 states have return successors, (388), 290 states have call predecessors, (388), 388 states have call successors, (388) [2023-02-15 22:04:31,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8412 states to 8412 states and 11463 transitions. [2023-02-15 22:04:31,344 INFO L78 Accepts]: Start accepts. Automaton has 8412 states and 11463 transitions. Word has length 59 [2023-02-15 22:04:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:31,345 INFO L495 AbstractCegarLoop]: Abstraction has 8412 states and 11463 transitions. [2023-02-15 22:04:31,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 8412 states and 11463 transitions. [2023-02-15 22:04:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 22:04:31,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:31,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:31,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-02-15 22:04:31,351 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:31,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:31,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1870749629, now seen corresponding path program 1 times [2023-02-15 22:04:31,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:31,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108955882] [2023-02-15 22:04:31,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:31,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:31,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:31,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:31,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:31,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108955882] [2023-02-15 22:04:31,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108955882] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:31,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:31,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-15 22:04:31,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497806300] [2023-02-15 22:04:31,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:31,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 22:04:31,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:31,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 22:04:31,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-15 22:04:31,731 INFO L87 Difference]: Start difference. First operand 8412 states and 11463 transitions. Second operand has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:32,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:32,145 INFO L93 Difference]: Finished difference Result 10159 states and 13995 transitions. [2023-02-15 22:04:32,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 22:04:32,146 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 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 59 [2023-02-15 22:04:32,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:32,159 INFO L225 Difference]: With dead ends: 10159 [2023-02-15 22:04:32,159 INFO L226 Difference]: Without dead ends: 10159 [2023-02-15 22:04:32,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2023-02-15 22:04:32,160 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 938 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 877 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:32,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 877 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:04:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10159 states. [2023-02-15 22:04:32,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10159 to 8673. [2023-02-15 22:04:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8673 states, 8213 states have (on average 1.3417752343845124) internal successors, (11020), 8349 states have internal predecessors, (11020), 401 states have call successors, (401), 22 states have call predecessors, (401), 22 states have return successors, (401), 301 states have call predecessors, (401), 401 states have call successors, (401) [2023-02-15 22:04:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8673 states to 8673 states and 11822 transitions. [2023-02-15 22:04:32,265 INFO L78 Accepts]: Start accepts. Automaton has 8673 states and 11822 transitions. Word has length 59 [2023-02-15 22:04:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:32,265 INFO L495 AbstractCegarLoop]: Abstraction has 8673 states and 11822 transitions. [2023-02-15 22:04:32,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 11 states have internal predecessors, (57), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:32,266 INFO L276 IsEmpty]: Start isEmpty. Operand 8673 states and 11822 transitions. [2023-02-15 22:04:32,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 22:04:32,267 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:32,267 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:32,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2023-02-15 22:04:32,267 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:32,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1910438407, now seen corresponding path program 1 times [2023-02-15 22:04:32,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:32,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823903937] [2023-02-15 22:04:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:32,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:32,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:32,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:32,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-15 22:04:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 22:04:32,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:32,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823903937] [2023-02-15 22:04:32,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823903937] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:32,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363225438] [2023-02-15 22:04:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:32,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:32,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:32,556 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:04:32,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 22:04:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:32,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 22:04:32,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:33,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:33,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 22:04:33,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363225438] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:33,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 22:04:33,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 17 [2023-02-15 22:04:33,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412896565] [2023-02-15 22:04:33,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:33,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 22:04:33,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:33,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 22:04:33,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-02-15 22:04:33,095 INFO L87 Difference]: Start difference. First operand 8673 states and 11822 transitions. Second operand has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:04:33,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:33,496 INFO L93 Difference]: Finished difference Result 10800 states and 14688 transitions. [2023-02-15 22:04:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 22:04:33,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2023-02-15 22:04:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:33,511 INFO L225 Difference]: With dead ends: 10800 [2023-02-15 22:04:33,511 INFO L226 Difference]: Without dead ends: 10800 [2023-02-15 22:04:33,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=506, Unknown=0, NotChecked=0, Total=650 [2023-02-15 22:04:33,512 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 1023 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1023 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:33,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1023 Valid, 581 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:04:33,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10800 states. [2023-02-15 22:04:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10800 to 8671. [2023-02-15 22:04:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8671 states, 8213 states have (on average 1.3366613904785096) internal successors, (10978), 8347 states have internal predecessors, (10978), 401 states have call successors, (401), 22 states have call predecessors, (401), 22 states have return successors, (401), 301 states have call predecessors, (401), 401 states have call successors, (401) [2023-02-15 22:04:33,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8671 states to 8671 states and 11780 transitions. [2023-02-15 22:04:33,616 INFO L78 Accepts]: Start accepts. Automaton has 8671 states and 11780 transitions. Word has length 60 [2023-02-15 22:04:33,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:33,616 INFO L495 AbstractCegarLoop]: Abstraction has 8671 states and 11780 transitions. [2023-02-15 22:04:33,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:04:33,617 INFO L276 IsEmpty]: Start isEmpty. Operand 8671 states and 11780 transitions. [2023-02-15 22:04:33,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 22:04:33,617 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:33,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:33,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-15 22:04:33,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-02-15 22:04:33,824 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:33,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:33,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1346211993, now seen corresponding path program 1 times [2023-02-15 22:04:33,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:33,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180690796] [2023-02-15 22:04:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:33,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:33,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:33,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 22:04:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 22:04:33,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:33,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180690796] [2023-02-15 22:04:33,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180690796] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:33,863 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:33,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 22:04:33,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675784681] [2023-02-15 22:04:33,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:33,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 22:04:33,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:33,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 22:04:33,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:04:33,864 INFO L87 Difference]: Start difference. First operand 8671 states and 11780 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:33,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:33,889 INFO L93 Difference]: Finished difference Result 8671 states and 11726 transitions. [2023-02-15 22:04:33,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 22:04:33,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2023-02-15 22:04:33,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:33,901 INFO L225 Difference]: With dead ends: 8671 [2023-02-15 22:04:33,901 INFO L226 Difference]: Without dead ends: 8671 [2023-02-15 22:04:33,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 22:04:33,902 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 0 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:33,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 302 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:04:33,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8671 states. [2023-02-15 22:04:33,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8671 to 8671. [2023-02-15 22:04:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8671 states, 8213 states have (on average 1.3300864483136492) internal successors, (10924), 8347 states have internal predecessors, (10924), 401 states have call successors, (401), 22 states have call predecessors, (401), 22 states have return successors, (401), 301 states have call predecessors, (401), 401 states have call successors, (401) [2023-02-15 22:04:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8671 states to 8671 states and 11726 transitions. [2023-02-15 22:04:34,000 INFO L78 Accepts]: Start accepts. Automaton has 8671 states and 11726 transitions. Word has length 60 [2023-02-15 22:04:34,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:34,000 INFO L495 AbstractCegarLoop]: Abstraction has 8671 states and 11726 transitions. [2023-02-15 22:04:34,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:34,001 INFO L276 IsEmpty]: Start isEmpty. Operand 8671 states and 11726 transitions. [2023-02-15 22:04:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-15 22:04:34,002 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:34,002 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:34,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-02-15 22:04:34,002 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:34,002 INFO L85 PathProgramCache]: Analyzing trace with hash -707292911, now seen corresponding path program 1 times [2023-02-15 22:04:34,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:34,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113616524] [2023-02-15 22:04:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:34,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:34,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:34,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:34,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:34,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113616524] [2023-02-15 22:04:34,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113616524] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:34,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92756090] [2023-02-15 22:04:34,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:34,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:34,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:34,065 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:04:34,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 22:04:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:34,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 22:04:34,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:34,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:34,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:34,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92756090] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 22:04:34,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 22:04:34,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-02-15 22:04:34,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411003033] [2023-02-15 22:04:34,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 22:04:34,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 22:04:34,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:34,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 22:04:34,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:04:34,372 INFO L87 Difference]: Start difference. First operand 8671 states and 11726 transitions. Second operand has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:04:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:34,441 INFO L93 Difference]: Finished difference Result 18764 states and 25082 transitions. [2023-02-15 22:04:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 22:04:34,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 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 62 [2023-02-15 22:04:34,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:34,469 INFO L225 Difference]: With dead ends: 18764 [2023-02-15 22:04:34,469 INFO L226 Difference]: Without dead ends: 18764 [2023-02-15 22:04:34,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-15 22:04:34,470 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 418 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:34,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 675 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:04:34,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18764 states. [2023-02-15 22:04:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18764 to 13943. [2023-02-15 22:04:34,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13943 states, 13233 states have (on average 1.314516738456888) internal successors, (17395), 13387 states have internal predecessors, (17395), 653 states have call successors, (653), 22 states have call predecessors, (653), 22 states have return successors, (653), 533 states have call predecessors, (653), 653 states have call successors, (653) [2023-02-15 22:04:34,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13943 states to 13943 states and 18701 transitions. [2023-02-15 22:04:34,734 INFO L78 Accepts]: Start accepts. Automaton has 13943 states and 18701 transitions. Word has length 62 [2023-02-15 22:04:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:34,735 INFO L495 AbstractCegarLoop]: Abstraction has 13943 states and 18701 transitions. [2023-02-15 22:04:34,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:04:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 13943 states and 18701 transitions. [2023-02-15 22:04:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 22:04:34,736 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:34,736 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:34,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 22:04:34,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-15 22:04:34,937 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:34,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:34,938 INFO L85 PathProgramCache]: Analyzing trace with hash 940111791, now seen corresponding path program 1 times [2023-02-15 22:04:34,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:34,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781750920] [2023-02-15 22:04:34,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:34,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:34,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:35,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 22:04:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:35,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 22:04:35,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:35,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781750920] [2023-02-15 22:04:35,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781750920] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:35,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:35,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 22:04:35,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222793884] [2023-02-15 22:04:35,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:35,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 22:04:35,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:35,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 22:04:35,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:04:35,003 INFO L87 Difference]: Start difference. First operand 13943 states and 18701 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:35,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:35,084 INFO L93 Difference]: Finished difference Result 26861 states and 36369 transitions. [2023-02-15 22:04:35,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 22:04:35,085 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2023-02-15 22:04:35,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:35,130 INFO L225 Difference]: With dead ends: 26861 [2023-02-15 22:04:35,130 INFO L226 Difference]: Without dead ends: 26861 [2023-02-15 22:04:35,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 22:04:35,131 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 267 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:35,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 685 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 22:04:35,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26861 states. [2023-02-15 22:04:35,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26861 to 14009. [2023-02-15 22:04:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14009 states, 13299 states have (on average 1.3129558613429582) internal successors, (17461), 13453 states have internal predecessors, (17461), 653 states have call successors, (653), 22 states have call predecessors, (653), 22 states have return successors, (653), 533 states have call predecessors, (653), 653 states have call successors, (653) [2023-02-15 22:04:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14009 states to 14009 states and 18767 transitions. [2023-02-15 22:04:35,366 INFO L78 Accepts]: Start accepts. Automaton has 14009 states and 18767 transitions. Word has length 63 [2023-02-15 22:04:35,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:35,366 INFO L495 AbstractCegarLoop]: Abstraction has 14009 states and 18767 transitions. [2023-02-15 22:04:35,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 14009 states and 18767 transitions. [2023-02-15 22:04:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 22:04:35,367 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:35,367 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:35,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2023-02-15 22:04:35,368 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:35,368 INFO L85 PathProgramCache]: Analyzing trace with hash 940111853, now seen corresponding path program 1 times [2023-02-15 22:04:35,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:35,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331912830] [2023-02-15 22:04:35,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:35,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:35,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:35,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 22:04:35,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 22:04:35,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:35,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331912830] [2023-02-15 22:04:35,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331912830] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:35,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:35,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:04:35,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557285293] [2023-02-15 22:04:35,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:35,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:04:35,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:35,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:04:35,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:04:35,443 INFO L87 Difference]: Start difference. First operand 14009 states and 18767 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:35,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:35,658 INFO L93 Difference]: Finished difference Result 15277 states and 20560 transitions. [2023-02-15 22:04:35,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:04:35,660 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2023-02-15 22:04:35,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:35,681 INFO L225 Difference]: With dead ends: 15277 [2023-02-15 22:04:35,681 INFO L226 Difference]: Without dead ends: 15277 [2023-02-15 22:04:35,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-15 22:04:35,686 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 137 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:35,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 611 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 22:04:35,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15277 states. [2023-02-15 22:04:35,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15277 to 14009. [2023-02-15 22:04:35,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14009 states, 13299 states have (on average 1.3104744717647943) internal successors, (17428), 13453 states have internal predecessors, (17428), 653 states have call successors, (653), 22 states have call predecessors, (653), 22 states have return successors, (653), 533 states have call predecessors, (653), 653 states have call successors, (653) [2023-02-15 22:04:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14009 states to 14009 states and 18734 transitions. [2023-02-15 22:04:35,907 INFO L78 Accepts]: Start accepts. Automaton has 14009 states and 18734 transitions. Word has length 63 [2023-02-15 22:04:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:35,907 INFO L495 AbstractCegarLoop]: Abstraction has 14009 states and 18734 transitions. [2023-02-15 22:04:35,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:35,908 INFO L276 IsEmpty]: Start isEmpty. Operand 14009 states and 18734 transitions. [2023-02-15 22:04:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 22:04:35,909 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:35,909 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:35,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2023-02-15 22:04:35,909 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:35,910 INFO L85 PathProgramCache]: Analyzing trace with hash 940111854, now seen corresponding path program 1 times [2023-02-15 22:04:35,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:35,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6480451] [2023-02-15 22:04:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:35,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:36,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:36,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-15 22:04:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:36,044 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 22:04:36,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:36,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6480451] [2023-02-15 22:04:36,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6480451] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 22:04:36,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 22:04:36,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 22:04:36,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731325293] [2023-02-15 22:04:36,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 22:04:36,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-15 22:04:36,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:04:36,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-15 22:04:36,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-15 22:04:36,046 INFO L87 Difference]: Start difference. First operand 14009 states and 18734 transitions. Second operand has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:04:36,272 INFO L93 Difference]: Finished difference Result 14005 states and 18536 transitions. [2023-02-15 22:04:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 22:04:36,273 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2023-02-15 22:04:36,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:04:36,294 INFO L225 Difference]: With dead ends: 14005 [2023-02-15 22:04:36,294 INFO L226 Difference]: Without dead ends: 14005 [2023-02-15 22:04:36,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-15 22:04:36,297 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 141 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 22:04:36,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 566 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 22:04:36,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14005 states. [2023-02-15 22:04:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14005 to 14005. [2023-02-15 22:04:36,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14005 states, 13299 states have (on average 1.2955861342958117) internal successors, (17230), 13449 states have internal predecessors, (17230), 653 states have call successors, (653), 22 states have call predecessors, (653), 22 states have return successors, (653), 533 states have call predecessors, (653), 653 states have call successors, (653) [2023-02-15 22:04:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14005 states to 14005 states and 18536 transitions. [2023-02-15 22:04:36,449 INFO L78 Accepts]: Start accepts. Automaton has 14005 states and 18536 transitions. Word has length 63 [2023-02-15 22:04:36,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:04:36,449 INFO L495 AbstractCegarLoop]: Abstraction has 14005 states and 18536 transitions. [2023-02-15 22:04:36,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.4) internal successors, (47), 6 states have internal predecessors, (47), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 22:04:36,449 INFO L276 IsEmpty]: Start isEmpty. Operand 14005 states and 18536 transitions. [2023-02-15 22:04:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 22:04:36,450 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:04:36,450 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:04:36,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2023-02-15 22:04:36,451 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:04:36,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:04:36,451 INFO L85 PathProgramCache]: Analyzing trace with hash -451244996, now seen corresponding path program 1 times [2023-02-15 22:04:36,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:04:36,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61772941] [2023-02-15 22:04:36,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:36,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:04:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:37,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:04:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:37,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:04:37,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61772941] [2023-02-15 22:04:37,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61772941] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:04:37,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890396827] [2023-02-15 22:04:37,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:04:37,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:04:37,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:04:37,326 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:04:37,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 22:04:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:04:37,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-15 22:04:37,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:04:37,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 22:04:38,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 22:04:38,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 34 [2023-02-15 22:04:38,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 15 [2023-02-15 22:04:38,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2023-02-15 22:04:38,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:04:38,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:04:38,386 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2023-02-15 22:04:38,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 134 [2023-02-15 22:05:14,893 WARN L233 SmtUtils]: Spent 36.17s on a formula simplification. DAG size of input: 84 DAG size of output: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 22:05:33,141 WARN L233 SmtUtils]: Spent 16.06s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 22:05:55,313 WARN L233 SmtUtils]: Spent 18.06s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 22:06:17,531 WARN L233 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 22:06:20,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890396827] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:06:20,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 22:06:20,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2023-02-15 22:06:20,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284610977] [2023-02-15 22:06:20,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 22:06:20,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 22:06:20,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 22:06:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 22:06:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1050, Unknown=6, NotChecked=0, Total=1190 [2023-02-15 22:06:20,228 INFO L87 Difference]: Start difference. First operand 14005 states and 18536 transitions. Second operand has 27 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:06:21,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 22:06:21,613 INFO L93 Difference]: Finished difference Result 14496 states and 19214 transitions. [2023-02-15 22:06:21,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 22:06:21,614 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2023-02-15 22:06:21,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 22:06:21,631 INFO L225 Difference]: With dead ends: 14496 [2023-02-15 22:06:21,631 INFO L226 Difference]: Without dead ends: 14485 [2023-02-15 22:06:21,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 101.9s TimeCoverageRelationStatistics Valid=365, Invalid=1699, Unknown=6, NotChecked=0, Total=2070 [2023-02-15 22:06:21,632 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 1047 mSDsluCounter, 1422 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 1560 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 22:06:21,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1050 Valid, 1560 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1005 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 22:06:21,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14485 states. [2023-02-15 22:06:21,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14485 to 14033. [2023-02-15 22:06:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14033 states, 13327 states have (on average 1.295490357920012) internal successors, (17265), 13477 states have internal predecessors, (17265), 653 states have call successors, (653), 22 states have call predecessors, (653), 22 states have return successors, (653), 533 states have call predecessors, (653), 653 states have call successors, (653) [2023-02-15 22:06:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14033 states to 14033 states and 18571 transitions. [2023-02-15 22:06:21,782 INFO L78 Accepts]: Start accepts. Automaton has 14033 states and 18571 transitions. Word has length 63 [2023-02-15 22:06:21,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 22:06:21,782 INFO L495 AbstractCegarLoop]: Abstraction has 14033 states and 18571 transitions. [2023-02-15 22:06:21,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.461538461538462) internal successors, (116), 25 states have internal predecessors, (116), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 22:06:21,783 INFO L276 IsEmpty]: Start isEmpty. Operand 14033 states and 18571 transitions. [2023-02-15 22:06:21,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 22:06:21,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 22:06:21,784 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 22:06:21,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 22:06:21,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:06:21,990 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-15 22:06:21,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 22:06:21,991 INFO L85 PathProgramCache]: Analyzing trace with hash -193079558, now seen corresponding path program 1 times [2023-02-15 22:06:21,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 22:06:21,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216038989] [2023-02-15 22:06:21,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:06:21,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 22:06:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:06:22,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 22:06:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:06:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:06:22,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 22:06:22,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216038989] [2023-02-15 22:06:22,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216038989] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 22:06:22,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739599569] [2023-02-15 22:06:22,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 22:06:22,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 22:06:22,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 22:06:22,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 22:06:22,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 22:06:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 22:06:22,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 22:06:22,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 22:06:23,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 22:06:23,429 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 22:06:23,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-02-15 22:06:23,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 14 [2023-02-15 22:06:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 22:06:23,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 22:06:23,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2023-02-15 22:06:23,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2023-02-15 22:07:12,106 WARN L233 SmtUtils]: Spent 48.37s on a formula simplification. DAG size of input: 41 DAG size of output: 35 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 22:07:36,404 WARN L233 SmtUtils]: Spent 24.20s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)