./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 574ddb4e 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-?-574ddb4 [2023-02-17 08:28:26,338 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 08:28:26,340 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 08:28:26,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 08:28:26,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 08:28:26,380 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 08:28:26,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 08:28:26,385 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 08:28:26,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 08:28:26,394 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 08:28:26,395 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 08:28:26,398 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 08:28:26,398 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 08:28:26,400 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 08:28:26,402 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 08:28:26,404 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 08:28:26,405 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 08:28:26,408 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 08:28:26,410 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 08:28:26,415 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 08:28:26,417 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 08:28:26,418 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 08:28:26,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 08:28:26,421 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 08:28:26,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 08:28:26,430 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 08:28:26,430 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 08:28:26,432 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 08:28:26,433 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 08:28:26,433 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 08:28:26,434 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 08:28:26,435 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 08:28:26,436 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 08:28:26,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 08:28:26,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 08:28:26,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 08:28:26,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 08:28:26,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 08:28:26,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 08:28:26,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 08:28:26,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 08:28:26,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-17 08:28:26,480 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 08:28:26,481 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 08:28:26,481 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 08:28:26,481 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 08:28:26,482 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 08:28:26,483 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 08:28:26,483 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 08:28:26,483 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 08:28:26,484 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 08:28:26,484 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 08:28:26,485 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 08:28:26,485 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-17 08:28:26,485 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 08:28:26,485 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 08:28:26,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 08:28:26,486 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-17 08:28:26,486 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-17 08:28:26,486 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-17 08:28:26,486 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 08:28:26,487 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-17 08:28:26,487 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 08:28:26,487 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 08:28:26,487 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 08:28:26,487 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 08:28:26,487 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 08:28:26,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:28:26,488 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 08:28:26,488 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 08:28:26,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 08:28:26,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 08:28:26,489 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 08:28:26,489 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 08:28:26,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 08:28:26,490 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 08:28:26,490 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2023-02-17 08:28:26,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 08:28:26,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 08:28:26,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 08:28:26,764 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 08:28:26,765 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 08:28:26,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0217_1.i [2023-02-17 08:28:27,880 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 08:28:28,145 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 08:28:28,146 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2023-02-17 08:28:28,168 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6192d7d7d/e6ad89a1a7214970abad8b665d3ec2f7/FLAGab049eac1 [2023-02-17 08:28:28,183 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6192d7d7d/e6ad89a1a7214970abad8b665d3ec2f7 [2023-02-17 08:28:28,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 08:28:28,188 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 08:28:28,190 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 08:28:28,190 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 08:28:28,193 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 08:28:28,194 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,195 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44469b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28, skipping insertion in model container [2023-02-17 08:28:28,195 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,202 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 08:28:28,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 08:28:28,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:28:28,680 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 08:28:28,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 08:28:28,778 INFO L208 MainTranslator]: Completed translation [2023-02-17 08:28:28,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28 WrapperNode [2023-02-17 08:28:28,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 08:28:28,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 08:28:28,781 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 08:28:28,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 08:28:28,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,856 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 249 [2023-02-17 08:28:28,857 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 08:28:28,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 08:28:28,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 08:28:28,858 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 08:28:28,876 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,893 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,893 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,907 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,910 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,911 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 08:28:28,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 08:28:28,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 08:28:28,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 08:28:28,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28" (1/1) ... [2023-02-17 08:28:28,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 08:28:28,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:28:28,947 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) [2023-02-17 08:28:28,969 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 [2023-02-17 08:28:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-02-17 08:28:28,994 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-02-17 08:28:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 08:28:28,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 08:28:28,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 08:28:28,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-17 08:28:28,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-17 08:28:28,995 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 08:28:28,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-17 08:28:28,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 08:28:28,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 08:28:28,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 08:28:29,135 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 08:28:29,138 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 08:28:29,600 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 08:28:29,607 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 08:28:29,608 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-17 08:28:29,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:28:29 BoogieIcfgContainer [2023-02-17 08:28:29,611 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 08:28:29,613 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 08:28:29,613 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 08:28:29,616 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 08:28:29,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 08:28:28" (1/3) ... [2023-02-17 08:28:29,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4cdcf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:28:29, skipping insertion in model container [2023-02-17 08:28:29,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 08:28:28" (2/3) ... [2023-02-17 08:28:29,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4cdcf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 08:28:29, skipping insertion in model container [2023-02-17 08:28:29,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 08:28:29" (3/3) ... [2023-02-17 08:28:29,624 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2023-02-17 08:28:29,643 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 08:28:29,644 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2023-02-17 08:28:29,700 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 08:28:29,707 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;@259eca30, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 08:28:29,708 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-02-17 08:28:29,711 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) [2023-02-17 08:28:29,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-17 08:28:29,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:29,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-17 08:28:29,717 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)] === [2023-02-17 08:28:29,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:29,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1045674122, now seen corresponding path program 1 times [2023-02-17 08:28:29,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:29,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360764149] [2023-02-17 08:28:29,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:29,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:29,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:29,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360764149] [2023-02-17 08:28:29,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360764149] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:29,918 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:29,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:28:29,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23975412] [2023-02-17 08:28:29,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:29,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 08:28:29,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:29,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 08:28:29,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 08:28:29,964 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) [2023-02-17 08:28:30,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:30,004 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2023-02-17 08:28:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 08:28:30,006 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 [2023-02-17 08:28:30,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:30,020 INFO L225 Difference]: With dead ends: 170 [2023-02-17 08:28:30,020 INFO L226 Difference]: Without dead ends: 168 [2023-02-17 08:28:30,022 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 [2023-02-17 08:28:30,026 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 [2023-02-17 08:28:30,027 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] [2023-02-17 08:28:30,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-17 08:28:30,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-02-17 08:28:30,077 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) [2023-02-17 08:28:30,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2023-02-17 08:28:30,088 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 6 [2023-02-17 08:28:30,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:30,088 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2023-02-17 08:28:30,089 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) [2023-02-17 08:28:30,089 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2023-02-17 08:28:30,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:28:30,090 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:30,090 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:30,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 08:28:30,091 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)] === [2023-02-17 08:28:30,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:30,093 INFO L85 PathProgramCache]: Analyzing trace with hash 594374512, now seen corresponding path program 1 times [2023-02-17 08:28:30,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:30,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325919659] [2023-02-17 08:28:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:30,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:30,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:30,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:30,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325919659] [2023-02-17 08:28:30,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325919659] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:30,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:30,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:28:30,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858593116] [2023-02-17 08:28:30,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:30,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:30,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:30,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:30,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:30,209 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) [2023-02-17 08:28:30,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:30,278 INFO L93 Difference]: Finished difference Result 331 states and 375 transitions. [2023-02-17 08:28:30,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:30,279 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 [2023-02-17 08:28:30,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:30,283 INFO L225 Difference]: With dead ends: 331 [2023-02-17 08:28:30,284 INFO L226 Difference]: Without dead ends: 331 [2023-02-17 08:28:30,287 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 [2023-02-17 08:28:30,289 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 [2023-02-17 08:28:30,289 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] [2023-02-17 08:28:30,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-02-17 08:28:30,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 170. [2023-02-17 08:28:30,313 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) [2023-02-17 08:28:30,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2023-02-17 08:28:30,316 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 8 [2023-02-17 08:28:30,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:30,318 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2023-02-17 08:28:30,319 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) [2023-02-17 08:28:30,319 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2023-02-17 08:28:30,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:28:30,320 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:30,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:30,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 08:28:30,321 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)] === [2023-02-17 08:28:30,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:30,329 INFO L85 PathProgramCache]: Analyzing trace with hash 592527470, now seen corresponding path program 1 times [2023-02-17 08:28:30,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:30,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677073309] [2023-02-17 08:28:30,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:30,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:30,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:30,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:30,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677073309] [2023-02-17 08:28:30,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677073309] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:30,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:30,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-17 08:28:30,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149867398] [2023-02-17 08:28:30,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:30,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:28:30,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:30,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:28:30,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:28:30,453 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) [2023-02-17 08:28:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:30,683 INFO L93 Difference]: Finished difference Result 329 states and 372 transitions. [2023-02-17 08:28:30,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:28:30,684 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 [2023-02-17 08:28:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:30,686 INFO L225 Difference]: With dead ends: 329 [2023-02-17 08:28:30,686 INFO L226 Difference]: Without dead ends: 329 [2023-02-17 08:28:30,686 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 [2023-02-17 08:28:30,687 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 170 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-02-17 08:28:30,687 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] [2023-02-17 08:28:30,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-17 08:28:30,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 237. [2023-02-17 08:28:30,706 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) [2023-02-17 08:28:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 314 transitions. [2023-02-17 08:28:30,707 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 314 transitions. Word has length 8 [2023-02-17 08:28:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:30,707 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 314 transitions. [2023-02-17 08:28:30,708 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) [2023-02-17 08:28:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 314 transitions. [2023-02-17 08:28:30,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:28:30,708 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:30,708 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:30,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 08:28:30,709 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)] === [2023-02-17 08:28:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:30,709 INFO L85 PathProgramCache]: Analyzing trace with hash 592527471, now seen corresponding path program 1 times [2023-02-17 08:28:30,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:30,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318042863] [2023-02-17 08:28:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:30,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:30,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:30,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:30,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318042863] [2023-02-17 08:28:30,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318042863] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:30,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:30,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:28:30,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644713723] [2023-02-17 08:28:30,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:30,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:30,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:30,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:30,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:30,843 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) [2023-02-17 08:28:31,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:31,020 INFO L93 Difference]: Finished difference Result 384 states and 490 transitions. [2023-02-17 08:28:31,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:31,021 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 [2023-02-17 08:28:31,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:31,023 INFO L225 Difference]: With dead ends: 384 [2023-02-17 08:28:31,023 INFO L226 Difference]: Without dead ends: 384 [2023-02-17 08:28:31,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:31,026 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 123 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:31,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 412 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:28:31,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-02-17 08:28:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2023-02-17 08:28:31,035 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) [2023-02-17 08:28:31,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2023-02-17 08:28:31,037 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 8 [2023-02-17 08:28:31,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:31,037 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2023-02-17 08:28:31,037 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) [2023-02-17 08:28:31,037 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2023-02-17 08:28:31,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 08:28:31,037 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:31,038 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:31,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 08:28:31,038 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)] === [2023-02-17 08:28:31,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:31,038 INFO L85 PathProgramCache]: Analyzing trace with hash 592527533, now seen corresponding path program 1 times [2023-02-17 08:28:31,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:31,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013436648] [2023-02-17 08:28:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:31,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:31,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:31,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013436648] [2023-02-17 08:28:31,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013436648] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:31,148 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:31,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:28:31,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645336432] [2023-02-17 08:28:31,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:31,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:31,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:31,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:31,154 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) [2023-02-17 08:28:31,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:31,308 INFO L93 Difference]: Finished difference Result 383 states and 488 transitions. [2023-02-17 08:28:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:31,308 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 [2023-02-17 08:28:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:31,310 INFO L225 Difference]: With dead ends: 383 [2023-02-17 08:28:31,310 INFO L226 Difference]: Without dead ends: 383 [2023-02-17 08:28:31,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:31,313 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 122 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:31,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 382 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:31,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-17 08:28:31,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 318. [2023-02-17 08:28:31,331 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) [2023-02-17 08:28:31,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2023-02-17 08:28:31,333 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 8 [2023-02-17 08:28:31,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:31,333 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2023-02-17 08:28:31,333 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) [2023-02-17 08:28:31,334 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2023-02-17 08:28:31,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 08:28:31,336 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:31,336 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:31,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-17 08:28:31,337 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)] === [2023-02-17 08:28:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:31,338 INFO L85 PathProgramCache]: Analyzing trace with hash -329469321, now seen corresponding path program 1 times [2023-02-17 08:28:31,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:31,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475626513] [2023-02-17 08:28:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:31,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:31,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:31,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475626513] [2023-02-17 08:28:31,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475626513] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:31,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:31,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:28:31,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30552543] [2023-02-17 08:28:31,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:31,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:28:31,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:31,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:28:31,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:28:31,386 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) [2023-02-17 08:28:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:31,401 INFO L93 Difference]: Finished difference Result 459 states and 609 transitions. [2023-02-17 08:28:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:28:31,402 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 [2023-02-17 08:28:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:31,404 INFO L225 Difference]: With dead ends: 459 [2023-02-17 08:28:31,404 INFO L226 Difference]: Without dead ends: 459 [2023-02-17 08:28:31,405 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 [2023-02-17 08:28:31,407 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 [2023-02-17 08:28:31,409 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] [2023-02-17 08:28:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-02-17 08:28:31,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 320. [2023-02-17 08:28:31,420 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) [2023-02-17 08:28:31,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 453 transitions. [2023-02-17 08:28:31,422 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 453 transitions. Word has length 11 [2023-02-17 08:28:31,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:31,422 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 453 transitions. [2023-02-17 08:28:31,422 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) [2023-02-17 08:28:31,422 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 453 transitions. [2023-02-17 08:28:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-17 08:28:31,424 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:31,424 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:31,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 08:28:31,425 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)] === [2023-02-17 08:28:31,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:31,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1623615594, now seen corresponding path program 1 times [2023-02-17 08:28:31,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:31,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129437136] [2023-02-17 08:28:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:31,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:31,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:31,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:31,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129437136] [2023-02-17 08:28:31,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129437136] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:31,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:31,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:28:31,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870565083] [2023-02-17 08:28:31,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:31,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:28:31,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:31,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:28:31,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:28:31,462 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) [2023-02-17 08:28:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:31,566 INFO L93 Difference]: Finished difference Result 371 states and 500 transitions. [2023-02-17 08:28:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:28:31,567 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 [2023-02-17 08:28:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:31,570 INFO L225 Difference]: With dead ends: 371 [2023-02-17 08:28:31,570 INFO L226 Difference]: Without dead ends: 364 [2023-02-17 08:28:31,570 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 [2023-02-17 08:28:31,571 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 [2023-02-17 08:28:31,571 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] [2023-02-17 08:28:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-02-17 08:28:31,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 317. [2023-02-17 08:28:31,579 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) [2023-02-17 08:28:31,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 448 transitions. [2023-02-17 08:28:31,580 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 448 transitions. Word has length 12 [2023-02-17 08:28:31,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:31,581 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 448 transitions. [2023-02-17 08:28:31,581 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) [2023-02-17 08:28:31,581 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 448 transitions. [2023-02-17 08:28:31,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 08:28:31,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:31,582 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:31,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 08:28:31,582 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)] === [2023-02-17 08:28:31,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:31,583 INFO L85 PathProgramCache]: Analyzing trace with hash -321333405, now seen corresponding path program 1 times [2023-02-17 08:28:31,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:31,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338806821] [2023-02-17 08:28:31,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:31,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:31,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 08:28:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:31,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:31,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338806821] [2023-02-17 08:28:31,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338806821] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:31,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:31,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:28:31,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840359425] [2023-02-17 08:28:31,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:31,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:31,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:31,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:31,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:31,617 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) [2023-02-17 08:28:31,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:31,635 INFO L93 Difference]: Finished difference Result 515 states and 714 transitions. [2023-02-17 08:28:31,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:31,636 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 [2023-02-17 08:28:31,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:31,638 INFO L225 Difference]: With dead ends: 515 [2023-02-17 08:28:31,639 INFO L226 Difference]: Without dead ends: 515 [2023-02-17 08:28:31,639 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 [2023-02-17 08:28:31,639 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 [2023-02-17 08:28:31,640 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] [2023-02-17 08:28:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-02-17 08:28:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 321. [2023-02-17 08:28:31,649 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) [2023-02-17 08:28:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2023-02-17 08:28:31,650 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 17 [2023-02-17 08:28:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:31,650 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2023-02-17 08:28:31,651 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) [2023-02-17 08:28:31,651 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2023-02-17 08:28:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 08:28:31,651 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:31,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:31,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-17 08:28:31,652 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)] === [2023-02-17 08:28:31,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:31,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1022397983, now seen corresponding path program 1 times [2023-02-17 08:28:31,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:31,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946227642] [2023-02-17 08:28:31,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:31,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:31,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 08:28:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:31,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:31,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946227642] [2023-02-17 08:28:31,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946227642] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:31,672 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:31,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:28:31,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039090371] [2023-02-17 08:28:31,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:31,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:28:31,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:31,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:28:31,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:28:31,674 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) [2023-02-17 08:28:31,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:31,682 INFO L93 Difference]: Finished difference Result 325 states and 454 transitions. [2023-02-17 08:28:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:28:31,683 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 [2023-02-17 08:28:31,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:31,684 INFO L225 Difference]: With dead ends: 325 [2023-02-17 08:28:31,684 INFO L226 Difference]: Without dead ends: 325 [2023-02-17 08:28:31,685 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 [2023-02-17 08:28:31,685 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 [2023-02-17 08:28:31,686 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] [2023-02-17 08:28:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-02-17 08:28:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2023-02-17 08:28:31,691 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) [2023-02-17 08:28:31,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 454 transitions. [2023-02-17 08:28:31,693 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 454 transitions. Word has length 17 [2023-02-17 08:28:31,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:31,693 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 454 transitions. [2023-02-17 08:28:31,693 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) [2023-02-17 08:28:31,694 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 454 transitions. [2023-02-17 08:28:31,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 08:28:31,694 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:31,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:31,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 08:28:31,695 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)] === [2023-02-17 08:28:31,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:31,695 INFO L85 PathProgramCache]: Analyzing trace with hash -213051357, now seen corresponding path program 1 times [2023-02-17 08:28:31,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:31,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205677749] [2023-02-17 08:28:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:31,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:31,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 08:28:31,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:31,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:31,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205677749] [2023-02-17 08:28:31,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205677749] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:31,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:31,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:28:31,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893756835] [2023-02-17 08:28:31,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:31,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:31,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:31,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:31,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:31,757 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) [2023-02-17 08:28:32,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:32,017 INFO L93 Difference]: Finished difference Result 550 states and 690 transitions. [2023-02-17 08:28:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:32,018 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 [2023-02-17 08:28:32,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:32,020 INFO L225 Difference]: With dead ends: 550 [2023-02-17 08:28:32,020 INFO L226 Difference]: Without dead ends: 550 [2023-02-17 08:28:32,021 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 [2023-02-17 08:28:32,021 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 [2023-02-17 08:28:32,021 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] [2023-02-17 08:28:32,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-02-17 08:28:32,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 331. [2023-02-17 08:28:32,030 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) [2023-02-17 08:28:32,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 460 transitions. [2023-02-17 08:28:32,031 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 460 transitions. Word has length 17 [2023-02-17 08:28:32,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:32,032 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 460 transitions. [2023-02-17 08:28:32,032 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) [2023-02-17 08:28:32,032 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 460 transitions. [2023-02-17 08:28:32,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 08:28:32,033 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:32,033 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:32,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-17 08:28:32,033 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)] === [2023-02-17 08:28:32,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:32,034 INFO L85 PathProgramCache]: Analyzing trace with hash -213051356, now seen corresponding path program 1 times [2023-02-17 08:28:32,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:32,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303532002] [2023-02-17 08:28:32,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:32,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:32,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 08:28:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:32,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:32,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303532002] [2023-02-17 08:28:32,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303532002] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:32,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:32,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:28:32,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705900806] [2023-02-17 08:28:32,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:32,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:32,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:32,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:32,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:32,108 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) [2023-02-17 08:28:32,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:32,279 INFO L93 Difference]: Finished difference Result 378 states and 479 transitions. [2023-02-17 08:28:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:32,280 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 [2023-02-17 08:28:32,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:32,282 INFO L225 Difference]: With dead ends: 378 [2023-02-17 08:28:32,282 INFO L226 Difference]: Without dead ends: 378 [2023-02-17 08:28:32,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:28:32,283 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 172 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:32,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 431 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:28:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-02-17 08:28:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 331. [2023-02-17 08:28:32,289 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) [2023-02-17 08:28:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 454 transitions. [2023-02-17 08:28:32,290 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 454 transitions. Word has length 17 [2023-02-17 08:28:32,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:32,291 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 454 transitions. [2023-02-17 08:28:32,291 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) [2023-02-17 08:28:32,291 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 454 transitions. [2023-02-17 08:28:32,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 08:28:32,292 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:32,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:32,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-17 08:28:32,292 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)] === [2023-02-17 08:28:32,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:32,293 INFO L85 PathProgramCache]: Analyzing trace with hash 490210144, now seen corresponding path program 1 times [2023-02-17 08:28:32,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:32,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208724297] [2023-02-17 08:28:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:32,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:32,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:32,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:32,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:32,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208724297] [2023-02-17 08:28:32,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208724297] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:32,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:32,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:28:32,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213218917] [2023-02-17 08:28:32,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:32,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:28:32,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:32,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:28:32,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:28:32,366 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) [2023-02-17 08:28:32,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:32,726 INFO L93 Difference]: Finished difference Result 680 states and 803 transitions. [2023-02-17 08:28:32,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:28:32,726 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 [2023-02-17 08:28:32,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:32,731 INFO L225 Difference]: With dead ends: 680 [2023-02-17 08:28:32,731 INFO L226 Difference]: Without dead ends: 680 [2023-02-17 08:28:32,732 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 [2023-02-17 08:28:32,733 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 805 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2023-02-17 08:28:32,733 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] [2023-02-17 08:28:32,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2023-02-17 08:28:32,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 328. [2023-02-17 08:28:32,750 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) [2023-02-17 08:28:32,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 448 transitions. [2023-02-17 08:28:32,753 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 448 transitions. Word has length 18 [2023-02-17 08:28:32,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:32,755 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 448 transitions. [2023-02-17 08:28:32,755 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) [2023-02-17 08:28:32,755 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 448 transitions. [2023-02-17 08:28:32,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 08:28:32,756 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:32,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:32,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-17 08:28:32,756 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)] === [2023-02-17 08:28:32,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:32,757 INFO L85 PathProgramCache]: Analyzing trace with hash 490210145, now seen corresponding path program 1 times [2023-02-17 08:28:32,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:32,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311665724] [2023-02-17 08:28:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:32,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:32,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:32,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:32,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:32,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:32,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311665724] [2023-02-17 08:28:32,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311665724] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:32,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:32,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:28:32,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893059868] [2023-02-17 08:28:32,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:32,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:28:32,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:32,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:28:32,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:28:32,944 INFO L87 Difference]: Start difference. First operand 328 states and 448 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) [2023-02-17 08:28:33,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:33,532 INFO L93 Difference]: Finished difference Result 907 states and 1081 transitions. [2023-02-17 08:28:33,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 08:28:33,533 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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 [2023-02-17 08:28:33,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:33,537 INFO L225 Difference]: With dead ends: 907 [2023-02-17 08:28:33,537 INFO L226 Difference]: Without dead ends: 907 [2023-02-17 08:28:33,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:28:33,537 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 1101 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1105 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:33,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1105 Valid, 603 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 08:28:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2023-02-17 08:28:33,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 350. [2023-02-17 08:28:33,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 275 states have (on average 1.709090909090909) internal successors, (470), 339 states have internal predecessors, (470), 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) [2023-02-17 08:28:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 486 transitions. [2023-02-17 08:28:33,549 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 486 transitions. Word has length 18 [2023-02-17 08:28:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:33,549 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 486 transitions. [2023-02-17 08:28:33,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 6 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) [2023-02-17 08:28:33,550 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 486 transitions. [2023-02-17 08:28:33,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 08:28:33,550 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:33,550 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:33,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-17 08:28:33,551 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:33,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:33,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1983299101, now seen corresponding path program 1 times [2023-02-17 08:28:33,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:33,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244288589] [2023-02-17 08:28:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:33,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:33,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:33,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:33,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:33,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:33,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:33,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244288589] [2023-02-17 08:28:33,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244288589] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:33,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:33,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 08:28:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220531722] [2023-02-17 08:28:33,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:33,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:28:33,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:33,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:28:33,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:28:33,621 INFO L87 Difference]: Start difference. First operand 350 states and 486 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 08:28:33,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:33,704 INFO L93 Difference]: Finished difference Result 383 states and 489 transitions. [2023-02-17 08:28:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:28:33,704 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-02-17 08:28:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:33,706 INFO L225 Difference]: With dead ends: 383 [2023-02-17 08:28:33,706 INFO L226 Difference]: Without dead ends: 383 [2023-02-17 08:28:33,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:28:33,707 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 246 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 964 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:33,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 964 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:33,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-17 08:28:33,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 350. [2023-02-17 08:28:33,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 275 states have (on average 1.701818181818182) internal successors, (468), 339 states have internal predecessors, (468), 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) [2023-02-17 08:28:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 484 transitions. [2023-02-17 08:28:33,714 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 484 transitions. Word has length 19 [2023-02-17 08:28:33,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:33,714 INFO L495 AbstractCegarLoop]: Abstraction has 350 states and 484 transitions. [2023-02-17 08:28:33,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 08:28:33,715 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 484 transitions. [2023-02-17 08:28:33,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 08:28:33,715 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:33,715 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:33,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-17 08:28:33,716 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:33,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1983297179, now seen corresponding path program 1 times [2023-02-17 08:28:33,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:33,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412871958] [2023-02-17 08:28:33,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:33,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:33,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:33,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:33,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412871958] [2023-02-17 08:28:33,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412871958] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:33,827 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:33,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:28:33,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58405280] [2023-02-17 08:28:33,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:33,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:28:33,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:28:33,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:28:33,829 INFO L87 Difference]: Start difference. First operand 350 states and 484 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 08:28:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:34,379 INFO L93 Difference]: Finished difference Result 684 states and 840 transitions. [2023-02-17 08:28:34,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 08:28:34,379 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-02-17 08:28:34,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:34,382 INFO L225 Difference]: With dead ends: 684 [2023-02-17 08:28:34,382 INFO L226 Difference]: Without dead ends: 684 [2023-02-17 08:28:34,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:28:34,383 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 492 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 656 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:34,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [495 Valid, 656 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 08:28:34,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2023-02-17 08:28:34,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 348. [2023-02-17 08:28:34,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 273 states have (on average 1.7032967032967032) internal successors, (465), 337 states have internal predecessors, (465), 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) [2023-02-17 08:28:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 481 transitions. [2023-02-17 08:28:34,393 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 481 transitions. Word has length 19 [2023-02-17 08:28:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:34,393 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 481 transitions. [2023-02-17 08:28:34,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 08:28:34,393 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 481 transitions. [2023-02-17 08:28:34,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-17 08:28:34,394 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:34,394 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] [2023-02-17 08:28:34,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-17 08:28:34,394 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)] === [2023-02-17 08:28:34,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:34,395 INFO L85 PathProgramCache]: Analyzing trace with hash -254199642, now seen corresponding path program 1 times [2023-02-17 08:28:34,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:34,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646765970] [2023-02-17 08:28:34,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:34,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:34,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:34,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:34,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:34,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646765970] [2023-02-17 08:28:34,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646765970] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:34,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:34,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 08:28:34,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075216471] [2023-02-17 08:28:34,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:34,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:28:34,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:34,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:28:34,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:28:34,630 INFO L87 Difference]: Start difference. First operand 348 states and 481 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) [2023-02-17 08:28:34,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:34,974 INFO L93 Difference]: Finished difference Result 528 states and 698 transitions. [2023-02-17 08:28:34,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:28:34,975 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 [2023-02-17 08:28:34,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:34,977 INFO L225 Difference]: With dead ends: 528 [2023-02-17 08:28:34,977 INFO L226 Difference]: Without dead ends: 528 [2023-02-17 08:28:34,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:28:34,978 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 174 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:34,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1036 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 08:28:34,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-02-17 08:28:34,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 407. [2023-02-17 08:28:34,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 329 states have (on average 1.668693009118541) internal successors, (549), 392 states have internal predecessors, (549), 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) [2023-02-17 08:28:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 569 transitions. [2023-02-17 08:28:34,988 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 569 transitions. Word has length 22 [2023-02-17 08:28:34,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:34,988 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 569 transitions. [2023-02-17 08:28:34,988 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) [2023-02-17 08:28:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 569 transitions. [2023-02-17 08:28:34,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 08:28:34,989 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:34,989 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] [2023-02-17 08:28:34,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-17 08:28:34,990 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:34,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:34,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1832886663, now seen corresponding path program 1 times [2023-02-17 08:28:34,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:34,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011977589] [2023-02-17 08:28:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:34,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:35,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 08:28:35,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:35,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:35,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:35,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011977589] [2023-02-17 08:28:35,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011977589] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:35,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:35,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 08:28:35,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609215333] [2023-02-17 08:28:35,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:35,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:28:35,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:35,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:28:35,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:28:35,200 INFO L87 Difference]: Start difference. First operand 407 states and 569 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2023-02-17 08:28:35,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:35,727 INFO L93 Difference]: Finished difference Result 752 states and 1020 transitions. [2023-02-17 08:28:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 08:28:35,728 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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 [2023-02-17 08:28:35,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:35,731 INFO L225 Difference]: With dead ends: 752 [2023-02-17 08:28:35,731 INFO L226 Difference]: Without dead ends: 752 [2023-02-17 08:28:35,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:28:35,732 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 525 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:35,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 1498 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 08:28:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2023-02-17 08:28:35,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 401. [2023-02-17 08:28:35,741 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) [2023-02-17 08:28:35,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 558 transitions. [2023-02-17 08:28:35,742 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 558 transitions. Word has length 23 [2023-02-17 08:28:35,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:35,743 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 558 transitions. [2023-02-17 08:28:35,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 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) [2023-02-17 08:28:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 558 transitions. [2023-02-17 08:28:35,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-17 08:28:35,744 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:35,744 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] [2023-02-17 08:28:35,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-17 08:28:35,744 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:35,745 INFO L85 PathProgramCache]: Analyzing trace with hash -2020614998, now seen corresponding path program 1 times [2023-02-17 08:28:35,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:35,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811684305] [2023-02-17 08:28:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:35,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:35,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:35,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:35,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:35,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811684305] [2023-02-17 08:28:35,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811684305] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:35,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:35,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 08:28:35,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100591821] [2023-02-17 08:28:35,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:35,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:28:35,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:35,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:28:35,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:28:35,825 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) [2023-02-17 08:28:35,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:35,898 INFO L93 Difference]: Finished difference Result 430 states and 555 transitions. [2023-02-17 08:28:35,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:28:35,898 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 [2023-02-17 08:28:35,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:35,900 INFO L225 Difference]: With dead ends: 430 [2023-02-17 08:28:35,900 INFO L226 Difference]: Without dead ends: 430 [2023-02-17 08:28:35,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:28:35,901 INFO L413 NwaCegarLoop]: 253 mSDtfsCounter, 243 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:35,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 999 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:35,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-02-17 08:28:35,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 399. [2023-02-17 08:28:35,908 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) [2023-02-17 08:28:35,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 552 transitions. [2023-02-17 08:28:35,910 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 552 transitions. Word has length 23 [2023-02-17 08:28:35,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:35,910 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 552 transitions. [2023-02-17 08:28:35,910 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) [2023-02-17 08:28:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 552 transitions. [2023-02-17 08:28:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 08:28:35,911 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:35,911 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] [2023-02-17 08:28:35,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-17 08:28:35,911 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:35,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:35,912 INFO L85 PathProgramCache]: Analyzing trace with hash 535975453, now seen corresponding path program 1 times [2023-02-17 08:28:35,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:35,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546163200] [2023-02-17 08:28:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:35,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:35,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:35,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:35,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:35,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:35,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546163200] [2023-02-17 08:28:35,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546163200] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:35,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:35,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 08:28:35,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019590107] [2023-02-17 08:28:35,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:35,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:28:35,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:35,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:28:35,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:28:35,944 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) [2023-02-17 08:28:36,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:36,046 INFO L93 Difference]: Finished difference Result 487 states and 646 transitions. [2023-02-17 08:28:36,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:28:36,047 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 [2023-02-17 08:28:36,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:36,050 INFO L225 Difference]: With dead ends: 487 [2023-02-17 08:28:36,050 INFO L226 Difference]: Without dead ends: 487 [2023-02-17 08:28:36,050 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 [2023-02-17 08:28:36,051 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 [2023-02-17 08:28:36,051 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] [2023-02-17 08:28:36,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-02-17 08:28:36,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 396. [2023-02-17 08:28:36,089 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) [2023-02-17 08:28:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 543 transitions. [2023-02-17 08:28:36,090 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 543 transitions. Word has length 24 [2023-02-17 08:28:36,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:36,090 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 543 transitions. [2023-02-17 08:28:36,091 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) [2023-02-17 08:28:36,091 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 543 transitions. [2023-02-17 08:28:36,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 08:28:36,091 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:36,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:28:36,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-17 08:28:36,091 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:36,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash 535975454, now seen corresponding path program 1 times [2023-02-17 08:28:36,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:36,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030015782] [2023-02-17 08:28:36,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:36,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:36,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:36,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:36,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:36,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030015782] [2023-02-17 08:28:36,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030015782] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:36,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:36,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:28:36,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291032427] [2023-02-17 08:28:36,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:36,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:36,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:36,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:36,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:36,147 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) [2023-02-17 08:28:36,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:36,237 INFO L93 Difference]: Finished difference Result 425 states and 540 transitions. [2023-02-17 08:28:36,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:36,237 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 [2023-02-17 08:28:36,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:36,239 INFO L225 Difference]: With dead ends: 425 [2023-02-17 08:28:36,239 INFO L226 Difference]: Without dead ends: 425 [2023-02-17 08:28:36,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:36,240 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 318 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:36,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 277 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:36,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-02-17 08:28:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 394. [2023-02-17 08:28:36,246 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) [2023-02-17 08:28:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 537 transitions. [2023-02-17 08:28:36,248 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 537 transitions. Word has length 24 [2023-02-17 08:28:36,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:36,248 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 537 transitions. [2023-02-17 08:28:36,249 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) [2023-02-17 08:28:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 537 transitions. [2023-02-17 08:28:36,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 08:28:36,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:36,249 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] [2023-02-17 08:28:36,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-17 08:28:36,250 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:36,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:36,250 INFO L85 PathProgramCache]: Analyzing trace with hash 475133714, now seen corresponding path program 1 times [2023-02-17 08:28:36,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:36,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205883335] [2023-02-17 08:28:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:36,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:36,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 08:28:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:36,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:36,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205883335] [2023-02-17 08:28:36,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205883335] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:36,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:36,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:28:36,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548886] [2023-02-17 08:28:36,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:36,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:36,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:36,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:36,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:36,297 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) [2023-02-17 08:28:36,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:36,470 INFO L93 Difference]: Finished difference Result 619 states and 786 transitions. [2023-02-17 08:28:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:36,471 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 [2023-02-17 08:28:36,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:36,473 INFO L225 Difference]: With dead ends: 619 [2023-02-17 08:28:36,473 INFO L226 Difference]: Without dead ends: 619 [2023-02-17 08:28:36,474 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 [2023-02-17 08:28:36,474 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 [2023-02-17 08:28:36,475 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] [2023-02-17 08:28:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2023-02-17 08:28:36,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 414. [2023-02-17 08:28:36,483 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) [2023-02-17 08:28:36,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 577 transitions. [2023-02-17 08:28:36,485 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 577 transitions. Word has length 25 [2023-02-17 08:28:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:36,485 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 577 transitions. [2023-02-17 08:28:36,485 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) [2023-02-17 08:28:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 577 transitions. [2023-02-17 08:28:36,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 08:28:36,486 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:36,486 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] [2023-02-17 08:28:36,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-17 08:28:36,486 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:36,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:36,487 INFO L85 PathProgramCache]: Analyzing trace with hash 475133715, now seen corresponding path program 1 times [2023-02-17 08:28:36,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:36,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101586488] [2023-02-17 08:28:36,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:36,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:36,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 08:28:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:36,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:36,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:36,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101586488] [2023-02-17 08:28:36,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101586488] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:36,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:36,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:28:36,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839607831] [2023-02-17 08:28:36,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:36,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:36,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:36,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:36,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:36,553 INFO L87 Difference]: Start difference. First operand 414 states and 577 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) [2023-02-17 08:28:36,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:36,706 INFO L93 Difference]: Finished difference Result 457 states and 592 transitions. [2023-02-17 08:28:36,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:36,706 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 [2023-02-17 08:28:36,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:36,708 INFO L225 Difference]: With dead ends: 457 [2023-02-17 08:28:36,708 INFO L226 Difference]: Without dead ends: 457 [2023-02-17 08:28:36,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:28:36,709 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 158 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:36,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 405 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:36,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-02-17 08:28:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 414. [2023-02-17 08:28:36,716 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) [2023-02-17 08:28:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 568 transitions. [2023-02-17 08:28:36,718 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 568 transitions. Word has length 25 [2023-02-17 08:28:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:36,718 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 568 transitions. [2023-02-17 08:28:36,719 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) [2023-02-17 08:28:36,719 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 568 transitions. [2023-02-17 08:28:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 08:28:36,719 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:36,719 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, 1, 1] [2023-02-17 08:28:36,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-17 08:28:36,720 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:36,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:36,720 INFO L85 PathProgramCache]: Analyzing trace with hash -323662464, now seen corresponding path program 1 times [2023-02-17 08:28:36,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:36,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517939007] [2023-02-17 08:28:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:36,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:36,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:36,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:36,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:36,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517939007] [2023-02-17 08:28:36,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517939007] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:36,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:36,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:28:36,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672978465] [2023-02-17 08:28:36,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:36,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:36,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:36,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:36,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:36,808 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) [2023-02-17 08:28:36,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:36,915 INFO L93 Difference]: Finished difference Result 441 states and 568 transitions. [2023-02-17 08:28:36,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:36,915 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 [2023-02-17 08:28:36,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:36,917 INFO L225 Difference]: With dead ends: 441 [2023-02-17 08:28:36,917 INFO L226 Difference]: Without dead ends: 441 [2023-02-17 08:28:36,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:36,918 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 156 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:36,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 349 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-02-17 08:28:36,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 413. [2023-02-17 08:28:36,926 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) [2023-02-17 08:28:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 565 transitions. [2023-02-17 08:28:36,928 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 565 transitions. Word has length 26 [2023-02-17 08:28:36,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:36,928 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 565 transitions. [2023-02-17 08:28:36,929 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) [2023-02-17 08:28:36,929 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 565 transitions. [2023-02-17 08:28:36,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 08:28:36,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:36,929 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] [2023-02-17 08:28:36,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-17 08:28:36,930 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:36,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:36,930 INFO L85 PathProgramCache]: Analyzing trace with hash -323662657, now seen corresponding path program 1 times [2023-02-17 08:28:36,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:36,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343525487] [2023-02-17 08:28:36,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:36,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:37,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:37,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:37,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343525487] [2023-02-17 08:28:37,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343525487] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:37,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:37,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 08:28:37,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337072026] [2023-02-17 08:28:37,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:37,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:28:37,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:37,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:28:37,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:28:37,011 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) [2023-02-17 08:28:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:37,145 INFO L93 Difference]: Finished difference Result 625 states and 836 transitions. [2023-02-17 08:28:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 08:28:37,146 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 [2023-02-17 08:28:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:37,149 INFO L225 Difference]: With dead ends: 625 [2023-02-17 08:28:37,149 INFO L226 Difference]: Without dead ends: 625 [2023-02-17 08:28:37,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-17 08:28:37,150 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 161 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1044 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:37,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1044 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:37,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-02-17 08:28:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 443. [2023-02-17 08:28:37,165 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) [2023-02-17 08:28:37,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 600 transitions. [2023-02-17 08:28:37,166 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 600 transitions. Word has length 26 [2023-02-17 08:28:37,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:37,167 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 600 transitions. [2023-02-17 08:28:37,167 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) [2023-02-17 08:28:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 600 transitions. [2023-02-17 08:28:37,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 08:28:37,167 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:37,168 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] [2023-02-17 08:28:37,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-17 08:28:37,169 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:37,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:37,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1503548246, now seen corresponding path program 1 times [2023-02-17 08:28:37,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:37,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969206549] [2023-02-17 08:28:37,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:37,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:37,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 08:28:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:37,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:37,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969206549] [2023-02-17 08:28:37,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969206549] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:37,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:37,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:28:37,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695031955] [2023-02-17 08:28:37,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:37,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:28:37,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:37,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:28:37,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:28:37,287 INFO L87 Difference]: Start difference. First operand 443 states and 600 transitions. Second operand has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 08:28:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:37,475 INFO L93 Difference]: Finished difference Result 484 states and 620 transitions. [2023-02-17 08:28:37,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:28:37,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-02-17 08:28:37,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:37,477 INFO L225 Difference]: With dead ends: 484 [2023-02-17 08:28:37,477 INFO L226 Difference]: Without dead ends: 484 [2023-02-17 08:28:37,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:28:37,478 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 206 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:37,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 605 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:28:37,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2023-02-17 08:28:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 443. [2023-02-17 08:28:37,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 371 states have (on average 1.5525606469002695) internal successors, (576), 428 states have internal predecessors, (576), 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) [2023-02-17 08:28:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 596 transitions. [2023-02-17 08:28:37,487 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 596 transitions. Word has length 28 [2023-02-17 08:28:37,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:37,487 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 596 transitions. [2023-02-17 08:28:37,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.2) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 08:28:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 596 transitions. [2023-02-17 08:28:37,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 08:28:37,488 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:37,488 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] [2023-02-17 08:28:37,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-17 08:28:37,489 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:37,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:37,489 INFO L85 PathProgramCache]: Analyzing trace with hash 634621977, now seen corresponding path program 1 times [2023-02-17 08:28:37,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:37,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495622673] [2023-02-17 08:28:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:37,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:37,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:37,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 08:28:37,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:37,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:37,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495622673] [2023-02-17 08:28:37,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495622673] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:37,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:37,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 08:28:37,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536310667] [2023-02-17 08:28:37,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:37,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:28:37,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:28:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:28:37,628 INFO L87 Difference]: Start difference. First operand 443 states and 596 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 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) [2023-02-17 08:28:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:37,929 INFO L93 Difference]: Finished difference Result 548 states and 702 transitions. [2023-02-17 08:28:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 08:28:37,930 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 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 [2023-02-17 08:28:37,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:37,932 INFO L225 Difference]: With dead ends: 548 [2023-02-17 08:28:37,932 INFO L226 Difference]: Without dead ends: 548 [2023-02-17 08:28:37,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:28:37,933 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 238 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:37,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 1087 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:28:37,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2023-02-17 08:28:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 443. [2023-02-17 08:28:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 371 states have (on average 1.5498652291105122) internal successors, (575), 428 states have internal predecessors, (575), 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) [2023-02-17 08:28:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 595 transitions. [2023-02-17 08:28:37,942 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 595 transitions. Word has length 29 [2023-02-17 08:28:37,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:37,943 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 595 transitions. [2023-02-17 08:28:37,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 8 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) [2023-02-17 08:28:37,943 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 595 transitions. [2023-02-17 08:28:37,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-17 08:28:37,943 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:37,944 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] [2023-02-17 08:28:37,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-17 08:28:37,944 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:37,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1800846934, now seen corresponding path program 1 times [2023-02-17 08:28:37,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:37,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390078570] [2023-02-17 08:28:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:37,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:37,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:38,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-17 08:28:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:38,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:38,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:38,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390078570] [2023-02-17 08:28:38,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390078570] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:38,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:38,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-17 08:28:38,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195312572] [2023-02-17 08:28:38,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:38,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:28:38,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:38,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:28:38,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:28:38,126 INFO L87 Difference]: Start difference. First operand 443 states and 595 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 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) [2023-02-17 08:28:38,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:38,426 INFO L93 Difference]: Finished difference Result 493 states and 621 transitions. [2023-02-17 08:28:38,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 08:28:38,427 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 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 [2023-02-17 08:28:38,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:38,429 INFO L225 Difference]: With dead ends: 493 [2023-02-17 08:28:38,429 INFO L226 Difference]: Without dead ends: 493 [2023-02-17 08:28:38,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-17 08:28:38,430 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 329 mSDsluCounter, 1221 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 1482 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:38,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 1482 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:28:38,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-02-17 08:28:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 331. [2023-02-17 08:28:38,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 265 states have (on average 1.5547169811320756) internal successors, (412), 321 states have internal predecessors, (412), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 08:28:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 424 transitions. [2023-02-17 08:28:38,437 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 424 transitions. Word has length 30 [2023-02-17 08:28:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:38,437 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 424 transitions. [2023-02-17 08:28:38,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 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) [2023-02-17 08:28:38,438 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 424 transitions. [2023-02-17 08:28:38,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 08:28:38,438 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:38,438 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] [2023-02-17 08:28:38,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-17 08:28:38,439 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:38,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:38,439 INFO L85 PathProgramCache]: Analyzing trace with hash -2076048724, now seen corresponding path program 1 times [2023-02-17 08:28:38,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:38,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022491668] [2023-02-17 08:28:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:38,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:38,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:38,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:38,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022491668] [2023-02-17 08:28:38,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022491668] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:38,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:38,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:28:38,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978449123] [2023-02-17 08:28:38,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:38,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:28:38,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:38,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:28:38,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:28:38,506 INFO L87 Difference]: Start difference. First operand 331 states and 424 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) [2023-02-17 08:28:38,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:38,673 INFO L93 Difference]: Finished difference Result 421 states and 525 transitions. [2023-02-17 08:28:38,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:28:38,673 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 [2023-02-17 08:28:38,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:38,675 INFO L225 Difference]: With dead ends: 421 [2023-02-17 08:28:38,675 INFO L226 Difference]: Without dead ends: 421 [2023-02-17 08:28:38,675 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 [2023-02-17 08:28:38,675 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 489 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:38,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 537 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:38,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-02-17 08:28:38,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 330. [2023-02-17 08:28:38,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 265 states have (on average 1.5471698113207548) internal successors, (410), 320 states have internal predecessors, (410), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 08:28:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 422 transitions. [2023-02-17 08:28:38,682 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 422 transitions. Word has length 34 [2023-02-17 08:28:38,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:38,682 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 422 transitions. [2023-02-17 08:28:38,682 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) [2023-02-17 08:28:38,682 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 422 transitions. [2023-02-17 08:28:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-17 08:28:38,682 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:38,682 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] [2023-02-17 08:28:38,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-17 08:28:38,683 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:38,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:38,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2076048723, now seen corresponding path program 1 times [2023-02-17 08:28:38,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:38,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921074331] [2023-02-17 08:28:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:38,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:38,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:38,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:38,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921074331] [2023-02-17 08:28:38,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921074331] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:38,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:38,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:28:38,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549430592] [2023-02-17 08:28:38,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:38,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:28:38,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:38,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:28:38,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:28:38,804 INFO L87 Difference]: Start difference. First operand 330 states and 422 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) [2023-02-17 08:28:38,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:38,908 INFO L93 Difference]: Finished difference Result 329 states and 420 transitions. [2023-02-17 08:28:38,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:28:38,909 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 [2023-02-17 08:28:38,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:38,910 INFO L225 Difference]: With dead ends: 329 [2023-02-17 08:28:38,911 INFO L226 Difference]: Without dead ends: 329 [2023-02-17 08:28:38,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:28:38,912 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 519 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:38,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 330 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:38,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-17 08:28:38,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 329. [2023-02-17 08:28:38,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 265 states have (on average 1.539622641509434) internal successors, (408), 319 states have internal predecessors, (408), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 08:28:38,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 420 transitions. [2023-02-17 08:28:38,919 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 420 transitions. Word has length 34 [2023-02-17 08:28:38,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:38,920 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 420 transitions. [2023-02-17 08:28:38,920 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) [2023-02-17 08:28:38,920 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 420 transitions. [2023-02-17 08:28:38,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 08:28:38,921 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:38,921 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] [2023-02-17 08:28:38,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-17 08:28:38,921 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:38,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:38,923 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972557, now seen corresponding path program 1 times [2023-02-17 08:28:38,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:38,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454781079] [2023-02-17 08:28:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:38,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:38,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:39,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:39,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:39,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:39,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454781079] [2023-02-17 08:28:39,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454781079] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:39,004 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:39,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:28:39,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113838553] [2023-02-17 08:28:39,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:39,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:28:39,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:39,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:28:39,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:28:39,006 INFO L87 Difference]: Start difference. First operand 329 states and 420 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) [2023-02-17 08:28:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:39,170 INFO L93 Difference]: Finished difference Result 716 states and 882 transitions. [2023-02-17 08:28:39,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:28:39,170 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 [2023-02-17 08:28:39,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:39,173 INFO L225 Difference]: With dead ends: 716 [2023-02-17 08:28:39,173 INFO L226 Difference]: Without dead ends: 716 [2023-02-17 08:28:39,173 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 [2023-02-17 08:28:39,174 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 577 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:39,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 489 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:39,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2023-02-17 08:28:39,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 326. [2023-02-17 08:28:39,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 265 states have (on average 1.5169811320754718) internal successors, (402), 316 states have internal predecessors, (402), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 08:28:39,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 414 transitions. [2023-02-17 08:28:39,188 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 414 transitions. Word has length 36 [2023-02-17 08:28:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:39,189 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 414 transitions. [2023-02-17 08:28:39,190 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) [2023-02-17 08:28:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 414 transitions. [2023-02-17 08:28:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 08:28:39,190 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:39,190 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] [2023-02-17 08:28:39,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-17 08:28:39,192 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:39,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:39,192 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972558, now seen corresponding path program 1 times [2023-02-17 08:28:39,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:39,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135774050] [2023-02-17 08:28:39,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:39,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:39,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:39,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:39,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135774050] [2023-02-17 08:28:39,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135774050] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:39,335 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:39,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:28:39,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380247637] [2023-02-17 08:28:39,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:39,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:28:39,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:39,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:28:39,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:28:39,337 INFO L87 Difference]: Start difference. First operand 326 states and 414 transitions. Second operand has 6 states, 5 states have (on average 6.8) 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) [2023-02-17 08:28:39,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:39,551 INFO L93 Difference]: Finished difference Result 532 states and 672 transitions. [2023-02-17 08:28:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:28:39,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) 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 [2023-02-17 08:28:39,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:39,554 INFO L225 Difference]: With dead ends: 532 [2023-02-17 08:28:39,554 INFO L226 Difference]: Without dead ends: 532 [2023-02-17 08:28:39,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:28:39,554 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 598 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:39,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 448 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:28:39,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-02-17 08:28:39,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 325. [2023-02-17 08:28:39,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 265 states have (on average 1.509433962264151) internal successors, (400), 315 states have internal predecessors, (400), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 08:28:39,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 412 transitions. [2023-02-17 08:28:39,562 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 412 transitions. Word has length 36 [2023-02-17 08:28:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:39,562 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 412 transitions. [2023-02-17 08:28:39,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) 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) [2023-02-17 08:28:39,562 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 412 transitions. [2023-02-17 08:28:39,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-17 08:28:39,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:39,563 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] [2023-02-17 08:28:39,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-17 08:28:39,563 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:39,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972719, now seen corresponding path program 1 times [2023-02-17 08:28:39,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:39,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071936784] [2023-02-17 08:28:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:39,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:39,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:39,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:39,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071936784] [2023-02-17 08:28:39,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071936784] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:39,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:39,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:28:39,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219590649] [2023-02-17 08:28:39,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:39,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:28:39,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:39,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:28:39,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:28:39,736 INFO L87 Difference]: Start difference. First operand 325 states and 412 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) [2023-02-17 08:28:40,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:40,010 INFO L93 Difference]: Finished difference Result 475 states and 547 transitions. [2023-02-17 08:28:40,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:28:40,011 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 [2023-02-17 08:28:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:40,013 INFO L225 Difference]: With dead ends: 475 [2023-02-17 08:28:40,013 INFO L226 Difference]: Without dead ends: 475 [2023-02-17 08:28:40,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:28:40,013 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 372 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:40,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 436 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 08:28:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2023-02-17 08:28:40,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 325. [2023-02-17 08:28:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 265 states have (on average 1.5018867924528303) internal successors, (398), 315 states have internal predecessors, (398), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 08:28:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 410 transitions. [2023-02-17 08:28:40,032 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 410 transitions. Word has length 36 [2023-02-17 08:28:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:40,033 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 410 transitions. [2023-02-17 08:28:40,033 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) [2023-02-17 08:28:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 410 transitions. [2023-02-17 08:28:40,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 08:28:40,034 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:40,034 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] [2023-02-17 08:28:40,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2023-02-17 08:28:40,034 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash -274270044, now seen corresponding path program 1 times [2023-02-17 08:28:40,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:40,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404902095] [2023-02-17 08:28:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:40,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:40,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:40,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-17 08:28:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:28:40,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:40,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404902095] [2023-02-17 08:28:40,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404902095] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:28:40,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406352270] [2023-02-17 08:28:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:40,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:28:40,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:28:40,113 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) [2023-02-17 08:28:40,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 08:28:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:40,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 08:28:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:28:40,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:40,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:28:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:28:40,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406352270] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:28:40,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:28:40,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-17 08:28:40,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858606528] [2023-02-17 08:28:40,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:28:40,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:28:40,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:40,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:28:40,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:28:40,395 INFO L87 Difference]: Start difference. First operand 325 states and 410 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) [2023-02-17 08:28:40,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:40,460 INFO L93 Difference]: Finished difference Result 1305 states and 1682 transitions. [2023-02-17 08:28:40,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 08:28:40,461 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 [2023-02-17 08:28:40,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:40,465 INFO L225 Difference]: With dead ends: 1305 [2023-02-17 08:28:40,466 INFO L226 Difference]: Without dead ends: 1305 [2023-02-17 08:28:40,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-02-17 08:28:40,466 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 936 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 942 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:40,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [942 Valid, 1051 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:28:40,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1305 states. [2023-02-17 08:28:40,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1305 to 724. [2023-02-17 08:28:40,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 658 states have (on average 1.4620060790273557) internal successors, (962), 708 states have internal predecessors, (962), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:28:40,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 986 transitions. [2023-02-17 08:28:40,486 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 986 transitions. Word has length 50 [2023-02-17 08:28:40,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:40,486 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 986 transitions. [2023-02-17 08:28:40,487 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) [2023-02-17 08:28:40,487 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 986 transitions. [2023-02-17 08:28:40,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 08:28:40,487 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:40,487 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] [2023-02-17 08:28:40,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 08:28:40,697 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,SelfDestructingSolverStorable32 [2023-02-17 08:28:40,697 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:40,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:40,698 INFO L85 PathProgramCache]: Analyzing trace with hash -975334622, now seen corresponding path program 1 times [2023-02-17 08:28:40,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:40,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67874798] [2023-02-17 08:28:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:40,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:40,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:40,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-17 08:28:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:28:40,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:40,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67874798] [2023-02-17 08:28:40,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67874798] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:40,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:40,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:28:40,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392867165] [2023-02-17 08:28:40,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:40,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:28:40,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:40,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:28:40,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:28:40,870 INFO L87 Difference]: Start difference. First operand 724 states and 986 transitions. Second operand has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:28:41,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:41,063 INFO L93 Difference]: Finished difference Result 1113 states and 1503 transitions. [2023-02-17 08:28:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:28:41,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2023-02-17 08:28:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:41,071 INFO L225 Difference]: With dead ends: 1113 [2023-02-17 08:28:41,071 INFO L226 Difference]: Without dead ends: 1113 [2023-02-17 08:28:41,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:28:41,071 INFO L413 NwaCegarLoop]: 209 mSDtfsCounter, 448 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:41,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 324 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:28:41,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2023-02-17 08:28:41,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 719. [2023-02-17 08:28:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 658 states have (on average 1.4407294832826747) internal successors, (948), 703 states have internal predecessors, (948), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:28:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 972 transitions. [2023-02-17 08:28:41,089 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 972 transitions. Word has length 50 [2023-02-17 08:28:41,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:41,089 INFO L495 AbstractCegarLoop]: Abstraction has 719 states and 972 transitions. [2023-02-17 08:28:41,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 8.8) internal successors, (44), 6 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:28:41,089 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 972 transitions. [2023-02-17 08:28:41,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 08:28:41,090 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:41,090 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] [2023-02-17 08:28:41,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-17 08:28:41,090 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:41,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:41,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1212801990, now seen corresponding path program 1 times [2023-02-17 08:28:41,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:41,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772887861] [2023-02-17 08:28:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:41,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:41,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:28:41,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:41,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772887861] [2023-02-17 08:28:41,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772887861] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:41,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:41,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:28:41,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033540798] [2023-02-17 08:28:41,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:41,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:28:41,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:41,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:28:41,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:28:41,154 INFO L87 Difference]: Start difference. First operand 719 states and 972 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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) [2023-02-17 08:28:41,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:41,169 INFO L93 Difference]: Finished difference Result 826 states and 1102 transitions. [2023-02-17 08:28:41,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:28:41,169 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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 51 [2023-02-17 08:28:41,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:41,172 INFO L225 Difference]: With dead ends: 826 [2023-02-17 08:28:41,172 INFO L226 Difference]: Without dead ends: 826 [2023-02-17 08:28:41,173 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 [2023-02-17 08:28:41,174 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 120 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 404 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 [2023-02-17 08:28:41,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 404 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:28:41,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 826 states. [2023-02-17 08:28:41,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 826 to 725. [2023-02-17 08:28:41,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 664 states have (on average 1.4367469879518073) internal successors, (954), 709 states have internal predecessors, (954), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-17 08:28:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 978 transitions. [2023-02-17 08:28:41,222 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 978 transitions. Word has length 51 [2023-02-17 08:28:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:41,223 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 978 transitions. [2023-02-17 08:28:41,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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) [2023-02-17 08:28:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 978 transitions. [2023-02-17 08:28:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 08:28:41,224 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:41,224 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] [2023-02-17 08:28:41,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-02-17 08:28:41,225 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash 532743620, now seen corresponding path program 1 times [2023-02-17 08:28:41,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:41,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668550196] [2023-02-17 08:28:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:41,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:41,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:28:41,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668550196] [2023-02-17 08:28:41,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668550196] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:28:41,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704376253] [2023-02-17 08:28:41,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:41,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:28:41,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:28:41,291 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) [2023-02-17 08:28:41,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 08:28:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:41,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 08:28:41,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:28:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:28:41,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:28:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:28:41,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704376253] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:28:41,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:28:41,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-02-17 08:28:41,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132351029] [2023-02-17 08:28:41,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:28:41,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 08:28:41,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:41,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 08:28:41,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 08:28:41,448 INFO L87 Difference]: Start difference. First operand 725 states and 978 transitions. Second operand has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 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) [2023-02-17 08:28:41,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:41,489 INFO L93 Difference]: Finished difference Result 2559 states and 3441 transitions. [2023-02-17 08:28:41,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:28:41,490 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 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 [2023-02-17 08:28:41,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:41,499 INFO L225 Difference]: With dead ends: 2559 [2023-02-17 08:28:41,499 INFO L226 Difference]: Without dead ends: 2559 [2023-02-17 08:28:41,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-02-17 08:28:41,500 INFO L413 NwaCegarLoop]: 291 mSDtfsCounter, 504 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:41,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1155 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:28:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2559 states. [2023-02-17 08:28:41,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2559 to 1754. [2023-02-17 08:28:41,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1754 states, 1674 states have (on average 1.4301075268817205) internal successors, (2394), 1719 states have internal predecessors, (2394), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-17 08:28:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1754 states to 1754 states and 2456 transitions. [2023-02-17 08:28:41,543 INFO L78 Accepts]: Start accepts. Automaton has 1754 states and 2456 transitions. Word has length 51 [2023-02-17 08:28:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:41,543 INFO L495 AbstractCegarLoop]: Abstraction has 1754 states and 2456 transitions. [2023-02-17 08:28:41,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.714285714285715) internal successors, (124), 7 states have internal predecessors, (124), 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) [2023-02-17 08:28:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1754 states and 2456 transitions. [2023-02-17 08:28:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 08:28:41,544 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:41,544 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] [2023-02-17 08:28:41,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 08:28:41,751 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 [2023-02-17 08:28:41,752 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:41,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:41,752 INFO L85 PathProgramCache]: Analyzing trace with hash 530896578, now seen corresponding path program 1 times [2023-02-17 08:28:41,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:41,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761164271] [2023-02-17 08:28:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:41,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:42,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:42,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:42,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:42,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761164271] [2023-02-17 08:28:42,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761164271] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:42,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:42,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 08:28:42,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001196446] [2023-02-17 08:28:42,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:42,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 08:28:42,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:42,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 08:28:42,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-17 08:28:42,044 INFO L87 Difference]: Start difference. First operand 1754 states and 2456 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) [2023-02-17 08:28:42,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:42,298 INFO L93 Difference]: Finished difference Result 1772 states and 2474 transitions. [2023-02-17 08:28:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:28:42,298 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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 [2023-02-17 08:28:42,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:42,304 INFO L225 Difference]: With dead ends: 1772 [2023-02-17 08:28:42,305 INFO L226 Difference]: Without dead ends: 1772 [2023-02-17 08:28:42,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-17 08:28:42,309 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 392 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:42,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 565 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:28:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2023-02-17 08:28:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 1756. [2023-02-17 08:28:42,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1756 states, 1676 states have (on average 1.4301909307875895) internal successors, (2397), 1721 states have internal predecessors, (2397), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-17 08:28:42,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1756 states to 1756 states and 2459 transitions. [2023-02-17 08:28:42,345 INFO L78 Accepts]: Start accepts. Automaton has 1756 states and 2459 transitions. Word has length 51 [2023-02-17 08:28:42,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:42,345 INFO L495 AbstractCegarLoop]: Abstraction has 1756 states and 2459 transitions. [2023-02-17 08:28:42,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 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) [2023-02-17 08:28:42,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1756 states and 2459 transitions. [2023-02-17 08:28:42,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 08:28:42,348 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:42,348 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] [2023-02-17 08:28:42,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-17 08:28:42,349 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:42,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:42,349 INFO L85 PathProgramCache]: Analyzing trace with hash 530896640, now seen corresponding path program 1 times [2023-02-17 08:28:42,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:42,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898314345] [2023-02-17 08:28:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:42,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:42,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:42,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:42,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:42,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898314345] [2023-02-17 08:28:42,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898314345] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:42,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:42,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:28:42,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205331451] [2023-02-17 08:28:42,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:42,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:28:42,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:42,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:28:42,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:28:42,499 INFO L87 Difference]: Start difference. First operand 1756 states and 2459 transitions. Second operand has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 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) [2023-02-17 08:28:42,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:42,640 INFO L93 Difference]: Finished difference Result 1771 states and 2472 transitions. [2023-02-17 08:28:42,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:28:42,640 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 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 [2023-02-17 08:28:42,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:42,647 INFO L225 Difference]: With dead ends: 1771 [2023-02-17 08:28:42,648 INFO L226 Difference]: Without dead ends: 1771 [2023-02-17 08:28:42,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:28:42,649 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 420 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:42,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 305 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:28:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2023-02-17 08:28:42,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1753. [2023-02-17 08:28:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1674 states have (on average 1.4289127837514934) internal successors, (2392), 1718 states have internal predecessors, (2392), 31 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-17 08:28:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2454 transitions. [2023-02-17 08:28:42,678 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2454 transitions. Word has length 51 [2023-02-17 08:28:42,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:42,678 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2454 transitions. [2023-02-17 08:28:42,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.8) internal successors, (49), 6 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) [2023-02-17 08:28:42,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2454 transitions. [2023-02-17 08:28:42,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 08:28:42,679 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:42,679 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] [2023-02-17 08:28:42,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-02-17 08:28:42,680 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:42,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:42,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1870600004, now seen corresponding path program 1 times [2023-02-17 08:28:42,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:42,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762940869] [2023-02-17 08:28:42,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:42,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:43,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:43,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:43,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762940869] [2023-02-17 08:28:43,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762940869] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:43,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:43,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-17 08:28:43,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951044386] [2023-02-17 08:28:43,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:43,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 08:28:43,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 08:28:43,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:28:43,182 INFO L87 Difference]: Start difference. First operand 1753 states and 2454 transitions. Second operand has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 08:28:44,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:44,111 INFO L93 Difference]: Finished difference Result 3818 states and 5398 transitions. [2023-02-17 08:28:44,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 08:28:44,112 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2023-02-17 08:28:44,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:44,131 INFO L225 Difference]: With dead ends: 3818 [2023-02-17 08:28:44,135 INFO L226 Difference]: Without dead ends: 3818 [2023-02-17 08:28:44,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2023-02-17 08:28:44,136 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 1148 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 1346 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:44,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1151 Valid, 1346 Invalid, 972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 08:28:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3818 states. [2023-02-17 08:28:44,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3818 to 2333. [2023-02-17 08:28:44,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2333 states, 2230 states have (on average 1.4278026905829597) internal successors, (3184), 2291 states have internal predecessors, (3184), 54 states have call successors, (54), 5 states have call predecessors, (54), 5 states have return successors, (54), 36 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-17 08:28:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2333 states to 2333 states and 3292 transitions. [2023-02-17 08:28:44,197 INFO L78 Accepts]: Start accepts. Automaton has 2333 states and 3292 transitions. Word has length 54 [2023-02-17 08:28:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:44,198 INFO L495 AbstractCegarLoop]: Abstraction has 2333 states and 3292 transitions. [2023-02-17 08:28:44,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 08:28:44,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2333 states and 3292 transitions. [2023-02-17 08:28:44,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 08:28:44,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:44,199 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] [2023-02-17 08:28:44,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-02-17 08:28:44,200 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:44,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:44,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1870600005, now seen corresponding path program 1 times [2023-02-17 08:28:44,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:44,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806870871] [2023-02-17 08:28:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:44,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:44,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:44,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:44,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:44,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806870871] [2023-02-17 08:28:44,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806870871] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:44,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:44,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-17 08:28:44,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580735511] [2023-02-17 08:28:44,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:44,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 08:28:44,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:44,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 08:28:44,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-17 08:28:44,780 INFO L87 Difference]: Start difference. First operand 2333 states and 3292 transitions. Second operand has 12 states, 11 states have (on average 4.7272727272727275) 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) [2023-02-17 08:28:45,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:45,573 INFO L93 Difference]: Finished difference Result 3840 states and 5449 transitions. [2023-02-17 08:28:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 08:28:45,574 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.7272727272727275) 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 [2023-02-17 08:28:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:45,584 INFO L225 Difference]: With dead ends: 3840 [2023-02-17 08:28:45,584 INFO L226 Difference]: Without dead ends: 3840 [2023-02-17 08:28:45,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2023-02-17 08:28:45,585 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 977 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 978 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:45,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [978 Valid, 1185 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 08:28:45,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3840 states. [2023-02-17 08:28:45,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3840 to 2478. [2023-02-17 08:28:45,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2478 states, 2369 states have (on average 1.4402701561840439) internal successors, (3412), 2432 states have internal predecessors, (3412), 59 states have call successors, (59), 6 states have call predecessors, (59), 6 states have return successors, (59), 39 states have call predecessors, (59), 59 states have call successors, (59) [2023-02-17 08:28:45,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2478 states to 2478 states and 3530 transitions. [2023-02-17 08:28:45,639 INFO L78 Accepts]: Start accepts. Automaton has 2478 states and 3530 transitions. Word has length 54 [2023-02-17 08:28:45,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:45,639 INFO L495 AbstractCegarLoop]: Abstraction has 2478 states and 3530 transitions. [2023-02-17 08:28:45,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.7272727272727275) 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) [2023-02-17 08:28:45,640 INFO L276 IsEmpty]: Start isEmpty. Operand 2478 states and 3530 transitions. [2023-02-17 08:28:45,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 08:28:45,640 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:45,641 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] [2023-02-17 08:28:45,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-02-17 08:28:45,641 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:45,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:45,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1872447046, now seen corresponding path program 1 times [2023-02-17 08:28:45,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:45,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805292950] [2023-02-17 08:28:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:45,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:45,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:46,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:46,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:46,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:46,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805292950] [2023-02-17 08:28:46,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805292950] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:46,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:46,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-17 08:28:46,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961587082] [2023-02-17 08:28:46,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:46,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 08:28:46,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:46,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 08:28:46,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-17 08:28:46,211 INFO L87 Difference]: Start difference. First operand 2478 states and 3530 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) [2023-02-17 08:28:46,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:46,632 INFO L93 Difference]: Finished difference Result 2516 states and 3566 transitions. [2023-02-17 08:28:46,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 08:28:46,633 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 [2023-02-17 08:28:46,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:46,638 INFO L225 Difference]: With dead ends: 2516 [2023-02-17 08:28:46,638 INFO L226 Difference]: Without dead ends: 2516 [2023-02-17 08:28:46,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-17 08:28:46,638 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 109 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:46,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 779 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 08:28:46,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2516 states. [2023-02-17 08:28:46,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2516 to 2505. [2023-02-17 08:28:46,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2505 states, 2397 states have (on average 1.4347100542344597) internal successors, (3439), 2459 states have internal predecessors, (3439), 58 states have call successors, (58), 6 states have call predecessors, (58), 6 states have return successors, (58), 39 states have call predecessors, (58), 58 states have call successors, (58) [2023-02-17 08:28:46,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2505 states to 2505 states and 3555 transitions. [2023-02-17 08:28:46,675 INFO L78 Accepts]: Start accepts. Automaton has 2505 states and 3555 transitions. Word has length 54 [2023-02-17 08:28:46,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:46,675 INFO L495 AbstractCegarLoop]: Abstraction has 2505 states and 3555 transitions. [2023-02-17 08:28:46,675 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) [2023-02-17 08:28:46,675 INFO L276 IsEmpty]: Start isEmpty. Operand 2505 states and 3555 transitions. [2023-02-17 08:28:46,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 08:28:46,676 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:46,676 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] [2023-02-17 08:28:46,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-02-17 08:28:46,677 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:46,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:46,678 INFO L85 PathProgramCache]: Analyzing trace with hash 652010731, now seen corresponding path program 1 times [2023-02-17 08:28:46,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:46,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119147009] [2023-02-17 08:28:46,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:46,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:46,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:47,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:47,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:47,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119147009] [2023-02-17 08:28:47,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119147009] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:47,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:47,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-17 08:28:47,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345846007] [2023-02-17 08:28:47,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:47,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 08:28:47,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:47,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 08:28:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:28:47,206 INFO L87 Difference]: Start difference. First operand 2505 states and 3555 transitions. Second operand has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 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) [2023-02-17 08:28:48,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:48,062 INFO L93 Difference]: Finished difference Result 4246 states and 6027 transitions. [2023-02-17 08:28:48,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 08:28:48,062 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 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 [2023-02-17 08:28:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:48,071 INFO L225 Difference]: With dead ends: 4246 [2023-02-17 08:28:48,072 INFO L226 Difference]: Without dead ends: 4246 [2023-02-17 08:28:48,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=483, Unknown=0, NotChecked=0, Total=702 [2023-02-17 08:28:48,073 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 1532 mSDsluCounter, 1019 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1534 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:48,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1534 Valid, 1157 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 08:28:48,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4246 states. [2023-02-17 08:28:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4246 to 2756. [2023-02-17 08:28:48,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2623 states have (on average 1.42089210827297) internal successors, (3727), 2703 states have internal predecessors, (3727), 81 states have call successors, (81), 8 states have call predecessors, (81), 8 states have return successors, (81), 44 states have call predecessors, (81), 81 states have call successors, (81) [2023-02-17 08:28:48,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 3889 transitions. [2023-02-17 08:28:48,159 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 3889 transitions. Word has length 55 [2023-02-17 08:28:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:48,159 INFO L495 AbstractCegarLoop]: Abstraction has 2756 states and 3889 transitions. [2023-02-17 08:28:48,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.416666666666667) internal successors, (53), 13 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) [2023-02-17 08:28:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 3889 transitions. [2023-02-17 08:28:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 08:28:48,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:48,161 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] [2023-02-17 08:28:48,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-02-17 08:28:48,161 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:48,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:48,163 INFO L85 PathProgramCache]: Analyzing trace with hash 652010732, now seen corresponding path program 1 times [2023-02-17 08:28:48,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:48,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890987021] [2023-02-17 08:28:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:48,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:48,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:48,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:48,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:48,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:48,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890987021] [2023-02-17 08:28:48,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890987021] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:48,838 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:48,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-17 08:28:48,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255158471] [2023-02-17 08:28:48,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:48,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 08:28:48,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:48,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 08:28:48,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-17 08:28:48,843 INFO L87 Difference]: Start difference. First operand 2756 states and 3889 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 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) [2023-02-17 08:28:49,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:49,627 INFO L93 Difference]: Finished difference Result 4243 states and 6026 transitions. [2023-02-17 08:28:49,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 08:28:49,628 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 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 [2023-02-17 08:28:49,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:49,637 INFO L225 Difference]: With dead ends: 4243 [2023-02-17 08:28:49,637 INFO L226 Difference]: Without dead ends: 4243 [2023-02-17 08:28:49,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2023-02-17 08:28:49,638 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 1427 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1427 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:49,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1427 Valid, 955 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 08:28:49,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2023-02-17 08:28:49,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 2661. [2023-02-17 08:28:49,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2661 states, 2538 states have (on average 1.4231678486997636) internal successors, (3612), 2611 states have internal predecessors, (3612), 72 states have call successors, (72), 7 states have call predecessors, (72), 7 states have return successors, (72), 42 states have call predecessors, (72), 72 states have call successors, (72) [2023-02-17 08:28:49,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2661 states to 2661 states and 3756 transitions. [2023-02-17 08:28:49,689 INFO L78 Accepts]: Start accepts. Automaton has 2661 states and 3756 transitions. Word has length 55 [2023-02-17 08:28:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:49,689 INFO L495 AbstractCegarLoop]: Abstraction has 2661 states and 3756 transitions. [2023-02-17 08:28:49,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 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) [2023-02-17 08:28:49,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2661 states and 3756 transitions. [2023-02-17 08:28:49,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 08:28:49,690 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:49,691 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] [2023-02-17 08:28:49,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2023-02-17 08:28:49,691 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:49,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:49,692 INFO L85 PathProgramCache]: Analyzing trace with hash 653857773, now seen corresponding path program 1 times [2023-02-17 08:28:49,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:49,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463044973] [2023-02-17 08:28:49,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:49,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:49,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:49,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:49,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463044973] [2023-02-17 08:28:49,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463044973] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:49,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:49,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-17 08:28:49,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059334143] [2023-02-17 08:28:49,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:49,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 08:28:49,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:49,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 08:28:49,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-17 08:28:49,996 INFO L87 Difference]: Start difference. First operand 2661 states and 3756 transitions. Second operand has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 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) [2023-02-17 08:28:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:50,633 INFO L93 Difference]: Finished difference Result 3926 states and 5621 transitions. [2023-02-17 08:28:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 08:28:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 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 [2023-02-17 08:28:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:50,640 INFO L225 Difference]: With dead ends: 3926 [2023-02-17 08:28:50,640 INFO L226 Difference]: Without dead ends: 3926 [2023-02-17 08:28:50,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-17 08:28:50,641 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1156 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:50,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1158 Valid, 1047 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 08:28:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2023-02-17 08:28:50,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 2971. [2023-02-17 08:28:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2971 states, 2814 states have (on average 1.4129353233830846) internal successors, (3976), 2911 states have internal predecessors, (3976), 103 states have call successors, (103), 10 states have call predecessors, (103), 10 states have return successors, (103), 49 states have call predecessors, (103), 103 states have call successors, (103) [2023-02-17 08:28:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2971 states to 2971 states and 4182 transitions. [2023-02-17 08:28:50,689 INFO L78 Accepts]: Start accepts. Automaton has 2971 states and 4182 transitions. Word has length 55 [2023-02-17 08:28:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:50,689 INFO L495 AbstractCegarLoop]: Abstraction has 2971 states and 4182 transitions. [2023-02-17 08:28:50,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.818181818181818) internal successors, (53), 12 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) [2023-02-17 08:28:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 2971 states and 4182 transitions. [2023-02-17 08:28:50,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 08:28:50,690 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:50,691 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] [2023-02-17 08:28:50,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-02-17 08:28:50,691 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:50,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:50,691 INFO L85 PathProgramCache]: Analyzing trace with hash 653857774, now seen corresponding path program 1 times [2023-02-17 08:28:50,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:50,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278166564] [2023-02-17 08:28:50,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:50,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:50,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:51,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:51,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:51,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278166564] [2023-02-17 08:28:51,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278166564] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:51,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:51,104 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 08:28:51,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169336279] [2023-02-17 08:28:51,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:51,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 08:28:51,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:51,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 08:28:51,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-17 08:28:51,105 INFO L87 Difference]: Start difference. First operand 2971 states and 4182 transitions. Second operand has 11 states, 10 states have (on average 5.3) 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) [2023-02-17 08:28:51,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:51,604 INFO L93 Difference]: Finished difference Result 4020 states and 5768 transitions. [2023-02-17 08:28:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 08:28:51,604 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.3) 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 [2023-02-17 08:28:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:51,612 INFO L225 Difference]: With dead ends: 4020 [2023-02-17 08:28:51,612 INFO L226 Difference]: Without dead ends: 4020 [2023-02-17 08:28:51,613 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2023-02-17 08:28:51,613 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1038 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:51,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1038 Valid, 819 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 08:28:51,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4020 states. [2023-02-17 08:28:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4020 to 3244. [2023-02-17 08:28:51,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3244 states, 3075 states have (on average 1.4334959349593497) internal successors, (4408), 3176 states have internal predecessors, (4408), 113 states have call successors, (113), 12 states have call predecessors, (113), 12 states have return successors, (113), 55 states have call predecessors, (113), 113 states have call successors, (113) [2023-02-17 08:28:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3244 states to 3244 states and 4634 transitions. [2023-02-17 08:28:51,671 INFO L78 Accepts]: Start accepts. Automaton has 3244 states and 4634 transitions. Word has length 55 [2023-02-17 08:28:51,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:51,671 INFO L495 AbstractCegarLoop]: Abstraction has 3244 states and 4634 transitions. [2023-02-17 08:28:51,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.3) 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) [2023-02-17 08:28:51,672 INFO L276 IsEmpty]: Start isEmpty. Operand 3244 states and 4634 transitions. [2023-02-17 08:28:51,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-17 08:28:51,672 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:51,673 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] [2023-02-17 08:28:51,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2023-02-17 08:28:51,673 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:51,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:51,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1297077153, now seen corresponding path program 1 times [2023-02-17 08:28:51,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:51,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689200582] [2023-02-17 08:28:51,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:51,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:52,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:52,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-17 08:28:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:28:52,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:52,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689200582] [2023-02-17 08:28:52,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689200582] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:28:52,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5506410] [2023-02-17 08:28:52,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:52,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:28:52,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:28:52,236 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) [2023-02-17 08:28:52,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 08:28:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:52,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-17 08:28:52,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:28:52,416 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:28:52,417 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 15 [2023-02-17 08:28:52,468 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 [2023-02-17 08:28:52,471 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 [2023-02-17 08:28:52,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:28:52,502 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 [2023-02-17 08:28:52,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:28:52,507 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 [2023-02-17 08:28:52,534 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 [2023-02-17 08:28:52,539 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 [2023-02-17 08:28:52,593 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 23 treesize of output 7 [2023-02-17 08:28:52,596 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 23 treesize of output 7 [2023-02-17 08:28:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:52,613 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:28:52,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5506410] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:52,614 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:28:52,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 24 [2023-02-17 08:28:52,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052232542] [2023-02-17 08:28:52,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:52,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 08:28:52,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:52,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 08:28:52,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2023-02-17 08:28:52,616 INFO L87 Difference]: Start difference. First operand 3244 states and 4634 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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) [2023-02-17 08:28:53,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:53,112 INFO L93 Difference]: Finished difference Result 4290 states and 6114 transitions. [2023-02-17 08:28:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 08:28:53,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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 56 [2023-02-17 08:28:53,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:53,121 INFO L225 Difference]: With dead ends: 4290 [2023-02-17 08:28:53,122 INFO L226 Difference]: Without dead ends: 4290 [2023-02-17 08:28:53,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 08:28:53,125 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 706 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 708 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:53,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [708 Valid, 1197 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 08:28:53,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2023-02-17 08:28:53,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 3287. [2023-02-17 08:28:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3287 states, 3119 states have (on average 1.4260981083680666) internal successors, (4448), 3219 states have internal predecessors, (4448), 112 states have call successors, (112), 12 states have call predecessors, (112), 12 states have return successors, (112), 55 states have call predecessors, (112), 112 states have call successors, (112) [2023-02-17 08:28:53,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3287 states to 3287 states and 4672 transitions. [2023-02-17 08:28:53,192 INFO L78 Accepts]: Start accepts. Automaton has 3287 states and 4672 transitions. Word has length 56 [2023-02-17 08:28:53,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:53,192 INFO L495 AbstractCegarLoop]: Abstraction has 3287 states and 4672 transitions. [2023-02-17 08:28:53,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 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) [2023-02-17 08:28:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3287 states and 4672 transitions. [2023-02-17 08:28:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-17 08:28:53,193 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:53,193 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] [2023-02-17 08:28:53,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 08:28:53,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:28:53,400 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)] === [2023-02-17 08:28:53,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:53,401 INFO L85 PathProgramCache]: Analyzing trace with hash 528923948, now seen corresponding path program 1 times [2023-02-17 08:28:53,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:53,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23899647] [2023-02-17 08:28:53,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:53,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:53,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:53,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:53,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:53,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:53,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:53,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23899647] [2023-02-17 08:28:53,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23899647] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:53,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:53,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-17 08:28:53,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461082078] [2023-02-17 08:28:53,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:53,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 08:28:53,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:53,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 08:28:53,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-02-17 08:28:53,910 INFO L87 Difference]: Start difference. First operand 3287 states and 4672 transitions. Second operand has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 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) [2023-02-17 08:28:54,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:54,950 INFO L93 Difference]: Finished difference Result 5121 states and 7327 transitions. [2023-02-17 08:28:54,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-17 08:28:54,950 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 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 [2023-02-17 08:28:54,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:54,961 INFO L225 Difference]: With dead ends: 5121 [2023-02-17 08:28:54,961 INFO L226 Difference]: Without dead ends: 5121 [2023-02-17 08:28:54,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=703, Unknown=0, NotChecked=0, Total=992 [2023-02-17 08:28:54,962 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1557 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 1209 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1559 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 1240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:54,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1559 Valid, 1503 Invalid, 1240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1209 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 08:28:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5121 states. [2023-02-17 08:28:55,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5121 to 3798. [2023-02-17 08:28:55,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3582 states have (on average 1.4095477386934674) internal successors, (5049), 3716 states have internal predecessors, (5049), 156 states have call successors, (156), 16 states have call predecessors, (156), 16 states have return successors, (156), 65 states have call predecessors, (156), 156 states have call successors, (156) [2023-02-17 08:28:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 5361 transitions. [2023-02-17 08:28:55,029 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 5361 transitions. Word has length 56 [2023-02-17 08:28:55,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:55,029 INFO L495 AbstractCegarLoop]: Abstraction has 3798 states and 5361 transitions. [2023-02-17 08:28:55,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.6) internal successors, (54), 16 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) [2023-02-17 08:28:55,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 5361 transitions. [2023-02-17 08:28:55,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-17 08:28:55,030 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:55,030 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] [2023-02-17 08:28:55,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2023-02-17 08:28:55,031 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:55,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:55,032 INFO L85 PathProgramCache]: Analyzing trace with hash 528923949, now seen corresponding path program 1 times [2023-02-17 08:28:55,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:55,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991915814] [2023-02-17 08:28:55,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:55,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:55,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:55,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:55,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:55,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991915814] [2023-02-17 08:28:55,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991915814] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:28:55,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:28:55,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-02-17 08:28:55,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485607893] [2023-02-17 08:28:55,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:28:55,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-17 08:28:55,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:55,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-17 08:28:55,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-02-17 08:28:55,976 INFO L87 Difference]: Start difference. First operand 3798 states and 5361 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) [2023-02-17 08:28:57,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:28:57,061 INFO L93 Difference]: Finished difference Result 5151 states and 7355 transitions. [2023-02-17 08:28:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 08:28:57,062 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 [2023-02-17 08:28:57,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:28:57,072 INFO L225 Difference]: With dead ends: 5151 [2023-02-17 08:28:57,072 INFO L226 Difference]: Without dead ends: 5151 [2023-02-17 08:28:57,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=720, Unknown=0, NotChecked=0, Total=930 [2023-02-17 08:28:57,073 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 2304 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2305 SdHoareTripleChecker+Valid, 1287 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 08:28:57,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2305 Valid, 1287 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 08:28:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2023-02-17 08:28:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 3464. [2023-02-17 08:28:57,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3464 states, 3282 states have (on average 1.4177330895795246) internal successors, (4653), 3392 states have internal predecessors, (4653), 125 states have call successors, (125), 13 states have call predecessors, (125), 13 states have return successors, (125), 58 states have call predecessors, (125), 125 states have call successors, (125) [2023-02-17 08:28:57,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3464 states to 3464 states and 4903 transitions. [2023-02-17 08:28:57,133 INFO L78 Accepts]: Start accepts. Automaton has 3464 states and 4903 transitions. Word has length 56 [2023-02-17 08:28:57,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:28:57,133 INFO L495 AbstractCegarLoop]: Abstraction has 3464 states and 4903 transitions. [2023-02-17 08:28:57,133 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) [2023-02-17 08:28:57,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3464 states and 4903 transitions. [2023-02-17 08:28:57,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 08:28:57,134 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:28:57,134 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] [2023-02-17 08:28:57,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-02-17 08:28:57,135 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:28:57,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:28:57,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1776354176, now seen corresponding path program 1 times [2023-02-17 08:28:57,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:28:57,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633484667] [2023-02-17 08:28:57,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:57,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:28:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:57,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:28:57,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:57,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 08:28:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:28:57,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:28:57,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633484667] [2023-02-17 08:28:57,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633484667] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:28:57,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102336261] [2023-02-17 08:28:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:28:57,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:28:57,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:28:57,993 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) [2023-02-17 08:28:58,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 08:28:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:28:58,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-17 08:28:58,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:28:58,180 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 [2023-02-17 08:28:58,282 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 [2023-02-17 08:28:58,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:28:58,317 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 [2023-02-17 08:28:58,426 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:28:58,426 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 25 treesize of output 79 [2023-02-17 08:28:58,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2023-02-17 08:28:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:28:58,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:28:58,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102336261] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:28:58,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:28:58,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 26 [2023-02-17 08:28:58,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586225713] [2023-02-17 08:28:58,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:28:58,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-17 08:28:58,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:28:58,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-17 08:28:58,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-02-17 08:28:58,742 INFO L87 Difference]: Start difference. First operand 3464 states and 4903 transitions. Second operand has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 25 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) [2023-02-17 08:29:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:00,442 INFO L93 Difference]: Finished difference Result 5808 states and 8265 transitions. [2023-02-17 08:29:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-17 08:29:00,442 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 25 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 [2023-02-17 08:29:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:00,450 INFO L225 Difference]: With dead ends: 5808 [2023-02-17 08:29:00,450 INFO L226 Difference]: Without dead ends: 5808 [2023-02-17 08:29:00,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=556, Invalid=2306, Unknown=0, NotChecked=0, Total=2862 [2023-02-17 08:29:00,452 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 3076 mSDsluCounter, 2037 mSDsCounter, 0 mSdLazyCounter, 1711 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3077 SdHoareTripleChecker+Valid, 2183 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 1711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:00,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3077 Valid, 2183 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 1711 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-17 08:29:00,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2023-02-17 08:29:00,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 4434. [2023-02-17 08:29:00,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4434 states, 4170 states have (on average 1.394484412470024) internal successors, (5815), 4321 states have internal predecessors, (5815), 200 states have call successors, (200), 20 states have call predecessors, (200), 20 states have return successors, (200), 92 states have call predecessors, (200), 200 states have call successors, (200) [2023-02-17 08:29:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4434 states to 4434 states and 6215 transitions. [2023-02-17 08:29:00,513 INFO L78 Accepts]: Start accepts. Automaton has 4434 states and 6215 transitions. Word has length 57 [2023-02-17 08:29:00,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:00,514 INFO L495 AbstractCegarLoop]: Abstraction has 4434 states and 6215 transitions. [2023-02-17 08:29:00,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 4.038461538461538) internal successors, (105), 25 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) [2023-02-17 08:29:00,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4434 states and 6215 transitions. [2023-02-17 08:29:00,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 08:29:00,515 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:00,515 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] [2023-02-17 08:29:00,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 08:29:00,722 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,SelfDestructingSolverStorable48 [2023-02-17 08:29:00,722 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:00,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:00,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1776354177, now seen corresponding path program 1 times [2023-02-17 08:29:00,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:00,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079681444] [2023-02-17 08:29:00,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:00,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:00,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:01,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:01,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 08:29:01,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:29:01,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:01,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079681444] [2023-02-17 08:29:01,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079681444] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:01,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2588465] [2023-02-17 08:29:01,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:01,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:01,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:01,803 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) [2023-02-17 08:29:01,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 08:29:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:01,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-17 08:29:01,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:02,004 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 [2023-02-17 08:29:02,146 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 [2023-02-17 08:29:02,150 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 [2023-02-17 08:29:02,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:02,202 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 [2023-02-17 08:29:02,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:02,208 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 [2023-02-17 08:29:02,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:02,347 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 20 treesize of output 22 [2023-02-17 08:29:02,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:02,353 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 19 treesize of output 23 [2023-02-17 08:29:02,501 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:29:02,502 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 [2023-02-17 08:29:02,505 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:29:02,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2023-02-17 08:29:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:02,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:02,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2588465] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:02,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:29:02,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 32 [2023-02-17 08:29:02,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341995286] [2023-02-17 08:29:02,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:02,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 08:29:02,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:02,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 08:29:02,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1348, Unknown=0, NotChecked=0, Total=1482 [2023-02-17 08:29:02,807 INFO L87 Difference]: Start difference. First operand 4434 states and 6215 transitions. Second operand has 33 states, 32 states have (on average 3.3125) internal successors, (106), 31 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) [2023-02-17 08:29:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:06,921 INFO L93 Difference]: Finished difference Result 6827 states and 9726 transitions. [2023-02-17 08:29:06,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-17 08:29:06,929 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.3125) internal successors, (106), 31 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 [2023-02-17 08:29:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:06,939 INFO L225 Difference]: With dead ends: 6827 [2023-02-17 08:29:06,940 INFO L226 Difference]: Without dead ends: 6827 [2023-02-17 08:29:06,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1140, Invalid=5502, Unknown=0, NotChecked=0, Total=6642 [2023-02-17 08:29:06,942 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 7565 mSDsluCounter, 2345 mSDsCounter, 0 mSdLazyCounter, 2629 mSolverCounterSat, 275 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7565 SdHoareTripleChecker+Valid, 2472 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 275 IncrementalHoareTripleChecker+Valid, 2629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:06,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7565 Valid, 2472 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [275 Valid, 2629 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-02-17 08:29:06,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6827 states. [2023-02-17 08:29:07,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6827 to 5002. [2023-02-17 08:29:07,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5002 states, 4714 states have (on average 1.4202375901569793) internal successors, (6695), 4871 states have internal predecessors, (6695), 220 states have call successors, (220), 24 states have call predecessors, (220), 24 states have return successors, (220), 106 states have call predecessors, (220), 220 states have call successors, (220) [2023-02-17 08:29:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5002 states to 5002 states and 7135 transitions. [2023-02-17 08:29:07,034 INFO L78 Accepts]: Start accepts. Automaton has 5002 states and 7135 transitions. Word has length 57 [2023-02-17 08:29:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:07,034 INFO L495 AbstractCegarLoop]: Abstraction has 5002 states and 7135 transitions. [2023-02-17 08:29:07,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.3125) internal successors, (106), 31 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) [2023-02-17 08:29:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand 5002 states and 7135 transitions. [2023-02-17 08:29:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 08:29:07,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:07,035 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] [2023-02-17 08:29:07,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 08:29:07,242 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,SelfDestructingSolverStorable49 [2023-02-17 08:29:07,243 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:07,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:07,243 INFO L85 PathProgramCache]: Analyzing trace with hash -783228031, now seen corresponding path program 1 times [2023-02-17 08:29:07,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:07,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418068246] [2023-02-17 08:29:07,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:07,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:07,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:07,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:07,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:07,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:07,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418068246] [2023-02-17 08:29:07,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418068246] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757138261] [2023-02-17 08:29:07,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:07,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:07,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:07,291 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) [2023-02-17 08:29:07,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 08:29:07,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:07,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 08:29:07,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:07,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:29:07,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757138261] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:07,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:29:07,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-02-17 08:29:07,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962018343] [2023-02-17 08:29:07,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:07,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:29:07,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:07,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:29:07,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:29:07,456 INFO L87 Difference]: Start difference. First operand 5002 states and 7135 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) [2023-02-17 08:29:07,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:07,489 INFO L93 Difference]: Finished difference Result 6846 states and 9887 transitions. [2023-02-17 08:29:07,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:29:07,490 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 [2023-02-17 08:29:07,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:07,506 INFO L225 Difference]: With dead ends: 6846 [2023-02-17 08:29:07,507 INFO L226 Difference]: Without dead ends: 6846 [2023-02-17 08:29:07,507 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 [2023-02-17 08:29:07,507 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 334 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:07,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 364 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:29:07,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6846 states. [2023-02-17 08:29:07,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6846 to 6447. [2023-02-17 08:29:07,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6447 states, 6119 states have (on average 1.448439287465272) internal successors, (8863), 6276 states have internal predecessors, (8863), 260 states have call successors, (260), 24 states have call predecessors, (260), 24 states have return successors, (260), 146 states have call predecessors, (260), 260 states have call successors, (260) [2023-02-17 08:29:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6447 states to 6447 states and 9383 transitions. [2023-02-17 08:29:07,616 INFO L78 Accepts]: Start accepts. Automaton has 6447 states and 9383 transitions. Word has length 57 [2023-02-17 08:29:07,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:07,616 INFO L495 AbstractCegarLoop]: Abstraction has 6447 states and 9383 transitions. [2023-02-17 08:29:07,616 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) [2023-02-17 08:29:07,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6447 states and 9383 transitions. [2023-02-17 08:29:07,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-17 08:29:07,618 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:07,618 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] [2023-02-17 08:29:07,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 08:29:07,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:07,825 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:07,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:07,825 INFO L85 PathProgramCache]: Analyzing trace with hash 355545581, now seen corresponding path program 1 times [2023-02-17 08:29:07,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:07,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219597880] [2023-02-17 08:29:07,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:07,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:08,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:08,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:29:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:08,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:29:08,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:08,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219597880] [2023-02-17 08:29:08,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219597880] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:08,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:08,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-17 08:29:08,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512840430] [2023-02-17 08:29:08,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:08,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 08:29:08,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:08,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 08:29:08,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-02-17 08:29:08,335 INFO L87 Difference]: Start difference. First operand 6447 states and 9383 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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) [2023-02-17 08:29:09,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:09,601 INFO L93 Difference]: Finished difference Result 10677 states and 15305 transitions. [2023-02-17 08:29:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 08:29:09,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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 [2023-02-17 08:29:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:09,620 INFO L225 Difference]: With dead ends: 10677 [2023-02-17 08:29:09,620 INFO L226 Difference]: Without dead ends: 10677 [2023-02-17 08:29:09,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=777, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 08:29:09,622 INFO L413 NwaCegarLoop]: 228 mSDtfsCounter, 1814 mSDsluCounter, 1927 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1814 SdHoareTripleChecker+Valid, 2155 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:09,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1814 Valid, 2155 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 08:29:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10677 states. [2023-02-17 08:29:09,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10677 to 6355. [2023-02-17 08:29:09,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6355 states, 6027 states have (on average 1.4423427907748465) internal successors, (8693), 6184 states have internal predecessors, (8693), 260 states have call successors, (260), 24 states have call predecessors, (260), 24 states have return successors, (260), 146 states have call predecessors, (260), 260 states have call successors, (260) [2023-02-17 08:29:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 9213 transitions. [2023-02-17 08:29:09,744 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 9213 transitions. Word has length 58 [2023-02-17 08:29:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:09,744 INFO L495 AbstractCegarLoop]: Abstraction has 6355 states and 9213 transitions. [2023-02-17 08:29:09,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 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) [2023-02-17 08:29:09,745 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 9213 transitions. [2023-02-17 08:29:09,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 08:29:09,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:09,746 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] [2023-02-17 08:29:09,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-02-17 08:29:09,746 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:09,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:09,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1061403003, now seen corresponding path program 1 times [2023-02-17 08:29:09,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:09,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138616028] [2023-02-17 08:29:09,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:09,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:09,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:10,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:10,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:10,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:10,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:10,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138616028] [2023-02-17 08:29:10,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138616028] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:10,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:10,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-17 08:29:10,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142840265] [2023-02-17 08:29:10,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:10,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 08:29:10,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:10,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 08:29:10,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-17 08:29:10,312 INFO L87 Difference]: Start difference. First operand 6355 states and 9213 transitions. Second operand has 16 states, 15 states have (on average 3.8) internal successors, (57), 14 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) [2023-02-17 08:29:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:11,020 INFO L93 Difference]: Finished difference Result 7042 states and 10239 transitions. [2023-02-17 08:29:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 08:29:11,021 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 14 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 [2023-02-17 08:29:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:11,033 INFO L225 Difference]: With dead ends: 7042 [2023-02-17 08:29:11,034 INFO L226 Difference]: Without dead ends: 7042 [2023-02-17 08:29:11,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2023-02-17 08:29:11,034 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1478 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:11,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1480 Valid, 1187 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 655 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 08:29:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7042 states. [2023-02-17 08:29:11,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7042 to 6420. [2023-02-17 08:29:11,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6420 states, 6092 states have (on average 1.4427117531188445) internal successors, (8789), 6249 states have internal predecessors, (8789), 260 states have call successors, (260), 24 states have call predecessors, (260), 24 states have return successors, (260), 146 states have call predecessors, (260), 260 states have call successors, (260) [2023-02-17 08:29:11,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6420 states to 6420 states and 9309 transitions. [2023-02-17 08:29:11,134 INFO L78 Accepts]: Start accepts. Automaton has 6420 states and 9309 transitions. Word has length 59 [2023-02-17 08:29:11,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:11,135 INFO L495 AbstractCegarLoop]: Abstraction has 6420 states and 9309 transitions. [2023-02-17 08:29:11,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.8) internal successors, (57), 14 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) [2023-02-17 08:29:11,135 INFO L276 IsEmpty]: Start isEmpty. Operand 6420 states and 9309 transitions. [2023-02-17 08:29:11,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 08:29:11,137 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:11,137 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] [2023-02-17 08:29:11,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2023-02-17 08:29:11,138 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:11,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:11,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1870749629, now seen corresponding path program 1 times [2023-02-17 08:29:11,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:11,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221051044] [2023-02-17 08:29:11,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:11,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:11,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:11,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:11,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:11,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221051044] [2023-02-17 08:29:11,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221051044] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:11,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:11,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 08:29:11,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065354803] [2023-02-17 08:29:11,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:11,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 08:29:11,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:11,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 08:29:11,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-17 08:29:11,458 INFO L87 Difference]: Start difference. First operand 6420 states and 9309 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) [2023-02-17 08:29:11,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:11,929 INFO L93 Difference]: Finished difference Result 7453 states and 10796 transitions. [2023-02-17 08:29:11,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 08:29:11,929 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 [2023-02-17 08:29:11,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:11,941 INFO L225 Difference]: With dead ends: 7453 [2023-02-17 08:29:11,941 INFO L226 Difference]: Without dead ends: 7453 [2023-02-17 08:29:11,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2023-02-17 08:29:11,942 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 1178 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:11,942 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 886 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 08:29:11,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7453 states. [2023-02-17 08:29:12,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7453 to 6420. [2023-02-17 08:29:12,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6420 states, 6092 states have (on average 1.4427117531188445) internal successors, (8789), 6249 states have internal predecessors, (8789), 260 states have call successors, (260), 24 states have call predecessors, (260), 24 states have return successors, (260), 146 states have call predecessors, (260), 260 states have call successors, (260) [2023-02-17 08:29:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6420 states to 6420 states and 9309 transitions. [2023-02-17 08:29:12,032 INFO L78 Accepts]: Start accepts. Automaton has 6420 states and 9309 transitions. Word has length 59 [2023-02-17 08:29:12,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:12,033 INFO L495 AbstractCegarLoop]: Abstraction has 6420 states and 9309 transitions. [2023-02-17 08:29:12,033 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) [2023-02-17 08:29:12,033 INFO L276 IsEmpty]: Start isEmpty. Operand 6420 states and 9309 transitions. [2023-02-17 08:29:12,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-17 08:29:12,034 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:12,034 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] [2023-02-17 08:29:12,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-02-17 08:29:12,034 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:12,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1910438407, now seen corresponding path program 1 times [2023-02-17 08:29:12,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:12,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675251287] [2023-02-17 08:29:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:12,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:12,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:12,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:29:12,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:12,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:29:12,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:12,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675251287] [2023-02-17 08:29:12,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675251287] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:12,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:12,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 08:29:12,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720827871] [2023-02-17 08:29:12,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:12,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:29:12,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:12,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:29:12,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:29:12,204 INFO L87 Difference]: Start difference. First operand 6420 states and 9309 transitions. Second operand has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:29:12,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:12,405 INFO L93 Difference]: Finished difference Result 7876 states and 10976 transitions. [2023-02-17 08:29:12,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 08:29:12,406 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2023-02-17 08:29:12,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:12,419 INFO L225 Difference]: With dead ends: 7876 [2023-02-17 08:29:12,420 INFO L226 Difference]: Without dead ends: 7876 [2023-02-17 08:29:12,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-02-17 08:29:12,420 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 468 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 470 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:12,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [470 Valid, 353 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:29:12,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2023-02-17 08:29:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 6417. [2023-02-17 08:29:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6417 states, 6092 states have (on average 1.3964215364412345) internal successors, (8507), 6246 states have internal predecessors, (8507), 260 states have call successors, (260), 24 states have call predecessors, (260), 24 states have return successors, (260), 146 states have call predecessors, (260), 260 states have call successors, (260) [2023-02-17 08:29:12,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6417 states to 6417 states and 9027 transitions. [2023-02-17 08:29:12,506 INFO L78 Accepts]: Start accepts. Automaton has 6417 states and 9027 transitions. Word has length 60 [2023-02-17 08:29:12,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:12,507 INFO L495 AbstractCegarLoop]: Abstraction has 6417 states and 9027 transitions. [2023-02-17 08:29:12,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.714285714285714) internal successors, (54), 8 states have internal predecessors, (54), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:29:12,507 INFO L276 IsEmpty]: Start isEmpty. Operand 6417 states and 9027 transitions. [2023-02-17 08:29:12,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-17 08:29:12,508 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:12,508 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] [2023-02-17 08:29:12,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-02-17 08:29:12,508 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:12,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:12,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1346211993, now seen corresponding path program 1 times [2023-02-17 08:29:12,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:12,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865156724] [2023-02-17 08:29:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:12,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:12,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:12,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 08:29:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 08:29:12,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:12,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865156724] [2023-02-17 08:29:12,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865156724] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:12,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:12,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 08:29:12,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643283126] [2023-02-17 08:29:12,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:12,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 08:29:12,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:12,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 08:29:12,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 08:29:12,550 INFO L87 Difference]: Start difference. First operand 6417 states and 9027 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) [2023-02-17 08:29:12,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:12,571 INFO L93 Difference]: Finished difference Result 6417 states and 8989 transitions. [2023-02-17 08:29:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 08:29:12,571 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 [2023-02-17 08:29:12,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:12,578 INFO L225 Difference]: With dead ends: 6417 [2023-02-17 08:29:12,579 INFO L226 Difference]: Without dead ends: 6417 [2023-02-17 08:29:12,579 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 [2023-02-17 08:29:12,579 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 0 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 314 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 [2023-02-17 08:29:12,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 314 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:29:12,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6417 states. [2023-02-17 08:29:12,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6417 to 6417. [2023-02-17 08:29:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6417 states, 6092 states have (on average 1.3901838476690742) internal successors, (8469), 6246 states have internal predecessors, (8469), 260 states have call successors, (260), 24 states have call predecessors, (260), 24 states have return successors, (260), 146 states have call predecessors, (260), 260 states have call successors, (260) [2023-02-17 08:29:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6417 states to 6417 states and 8989 transitions. [2023-02-17 08:29:12,658 INFO L78 Accepts]: Start accepts. Automaton has 6417 states and 8989 transitions. Word has length 60 [2023-02-17 08:29:12,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:12,658 INFO L495 AbstractCegarLoop]: Abstraction has 6417 states and 8989 transitions. [2023-02-17 08:29:12,658 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) [2023-02-17 08:29:12,658 INFO L276 IsEmpty]: Start isEmpty. Operand 6417 states and 8989 transitions. [2023-02-17 08:29:12,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-17 08:29:12,660 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:12,660 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] [2023-02-17 08:29:12,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-02-17 08:29:12,660 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:12,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:12,661 INFO L85 PathProgramCache]: Analyzing trace with hash -707292911, now seen corresponding path program 1 times [2023-02-17 08:29:12,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:12,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478342383] [2023-02-17 08:29:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:12,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:12,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:12,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:12,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478342383] [2023-02-17 08:29:12,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478342383] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:12,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12347076] [2023-02-17 08:29:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:12,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:12,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:12,721 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) [2023-02-17 08:29:12,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 08:29:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:12,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 08:29:12,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:12,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:12,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12347076] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:12,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:12,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2023-02-17 08:29:12,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407601481] [2023-02-17 08:29:12,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:12,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 08:29:12,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:12,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 08:29:12,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:29:12,904 INFO L87 Difference]: Start difference. First operand 6417 states and 8989 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) [2023-02-17 08:29:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:12,959 INFO L93 Difference]: Finished difference Result 13091 states and 18347 transitions. [2023-02-17 08:29:12,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 08:29:12,960 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 [2023-02-17 08:29:12,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:12,982 INFO L225 Difference]: With dead ends: 13091 [2023-02-17 08:29:12,982 INFO L226 Difference]: Without dead ends: 13091 [2023-02-17 08:29:12,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 5 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-02-17 08:29:12,983 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 442 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 705 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 [2023-02-17 08:29:12,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 705 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:29:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13091 states. [2023-02-17 08:29:13,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13091 to 10090. [2023-02-17 08:29:13,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10090 states, 9631 states have (on average 1.397258851624961) internal successors, (13457), 9815 states have internal predecessors, (13457), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-17 08:29:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10090 states to 10090 states and 14245 transitions. [2023-02-17 08:29:13,204 INFO L78 Accepts]: Start accepts. Automaton has 10090 states and 14245 transitions. Word has length 62 [2023-02-17 08:29:13,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:13,204 INFO L495 AbstractCegarLoop]: Abstraction has 10090 states and 14245 transitions. [2023-02-17 08:29:13,204 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) [2023-02-17 08:29:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 10090 states and 14245 transitions. [2023-02-17 08:29:13,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-17 08:29:13,205 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:13,205 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] [2023-02-17 08:29:13,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 08:29:13,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:13,413 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:13,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1258787836, now seen corresponding path program 1 times [2023-02-17 08:29:13,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:13,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682552193] [2023-02-17 08:29:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:13,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:13,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:13,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:13,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:29:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:13,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 08:29:13,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:13,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682552193] [2023-02-17 08:29:13,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682552193] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:13,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:13,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 08:29:13,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57828744] [2023-02-17 08:29:13,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:13,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 08:29:13,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:13,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 08:29:13,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-17 08:29:13,742 INFO L87 Difference]: Start difference. First operand 10090 states and 14245 transitions. Second operand has 11 states, 10 states have (on average 5.5) internal successors, (55), 8 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 08:29:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:14,175 INFO L93 Difference]: Finished difference Result 14230 states and 19840 transitions. [2023-02-17 08:29:14,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 08:29:14,175 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.5) internal successors, (55), 8 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 63 [2023-02-17 08:29:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:14,200 INFO L225 Difference]: With dead ends: 14230 [2023-02-17 08:29:14,200 INFO L226 Difference]: Without dead ends: 14230 [2023-02-17 08:29:14,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=368, Unknown=0, NotChecked=0, Total=506 [2023-02-17 08:29:14,201 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 700 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:14,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 1363 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 08:29:14,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14230 states. [2023-02-17 08:29:14,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14230 to 10088. [2023-02-17 08:29:14,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10088 states, 9631 states have (on average 1.3924826082442114) internal successors, (13411), 9813 states have internal predecessors, (13411), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-17 08:29:14,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10088 states to 10088 states and 14199 transitions. [2023-02-17 08:29:14,363 INFO L78 Accepts]: Start accepts. Automaton has 10088 states and 14199 transitions. Word has length 63 [2023-02-17 08:29:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:14,364 INFO L495 AbstractCegarLoop]: Abstraction has 10088 states and 14199 transitions. [2023-02-17 08:29:14,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.5) internal successors, (55), 8 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 08:29:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 10088 states and 14199 transitions. [2023-02-17 08:29:14,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-17 08:29:14,365 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:14,365 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] [2023-02-17 08:29:14,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2023-02-17 08:29:14,366 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)] === [2023-02-17 08:29:14,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:14,366 INFO L85 PathProgramCache]: Analyzing trace with hash 940111791, now seen corresponding path program 1 times [2023-02-17 08:29:14,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:14,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849240732] [2023-02-17 08:29:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:14,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:14,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:14,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:14,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:14,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 08:29:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:14,415 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 08:29:14,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:14,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849240732] [2023-02-17 08:29:14,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849240732] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:14,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:14,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:29:14,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791019857] [2023-02-17 08:29:14,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:14,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:29:14,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:14,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:29:14,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:29:14,417 INFO L87 Difference]: Start difference. First operand 10088 states and 14199 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) [2023-02-17 08:29:14,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:14,465 INFO L93 Difference]: Finished difference Result 15511 states and 21994 transitions. [2023-02-17 08:29:14,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:29:14,466 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 [2023-02-17 08:29:14,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:14,491 INFO L225 Difference]: With dead ends: 15511 [2023-02-17 08:29:14,491 INFO L226 Difference]: Without dead ends: 15511 [2023-02-17 08:29:14,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:29:14,492 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 406 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:14,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 496 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:29:14,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15511 states. [2023-02-17 08:29:14,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15511 to 10144. [2023-02-17 08:29:14,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 9687 states have (on average 1.3912459997935378) internal successors, (13477), 9869 states have internal predecessors, (13477), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-17 08:29:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 14265 transitions. [2023-02-17 08:29:14,674 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 14265 transitions. Word has length 63 [2023-02-17 08:29:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:14,674 INFO L495 AbstractCegarLoop]: Abstraction has 10144 states and 14265 transitions. [2023-02-17 08:29:14,674 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) [2023-02-17 08:29:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 14265 transitions. [2023-02-17 08:29:14,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-17 08:29:14,675 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:14,676 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] [2023-02-17 08:29:14,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-02-17 08:29:14,676 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash 940111853, now seen corresponding path program 1 times [2023-02-17 08:29:14,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:14,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528024226] [2023-02-17 08:29:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:14,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:14,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:14,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:14,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 08:29:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 08:29:14,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:14,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528024226] [2023-02-17 08:29:14,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528024226] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:14,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:14,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:29:14,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624950516] [2023-02-17 08:29:14,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:14,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:29:14,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:14,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:29:14,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:29:14,751 INFO L87 Difference]: Start difference. First operand 10144 states and 14265 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) [2023-02-17 08:29:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:14,962 INFO L93 Difference]: Finished difference Result 10924 states and 15639 transitions. [2023-02-17 08:29:14,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:29:14,962 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 [2023-02-17 08:29:14,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:14,978 INFO L225 Difference]: With dead ends: 10924 [2023-02-17 08:29:14,978 INFO L226 Difference]: Without dead ends: 10924 [2023-02-17 08:29:14,979 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 [2023-02-17 08:29:14,979 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 141 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:14,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 615 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:29:14,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10924 states. [2023-02-17 08:29:15,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10924 to 10144. [2023-02-17 08:29:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 9687 states have (on average 1.3888716836998038) internal successors, (13454), 9869 states have internal predecessors, (13454), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-17 08:29:15,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 14242 transitions. [2023-02-17 08:29:15,218 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 14242 transitions. Word has length 63 [2023-02-17 08:29:15,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:15,218 INFO L495 AbstractCegarLoop]: Abstraction has 10144 states and 14242 transitions. [2023-02-17 08:29:15,218 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) [2023-02-17 08:29:15,219 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 14242 transitions. [2023-02-17 08:29:15,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-17 08:29:15,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:15,220 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] [2023-02-17 08:29:15,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2023-02-17 08:29:15,220 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:15,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:15,221 INFO L85 PathProgramCache]: Analyzing trace with hash 940111854, now seen corresponding path program 1 times [2023-02-17 08:29:15,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:15,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147131217] [2023-02-17 08:29:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:15,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:15,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:15,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:15,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 08:29:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 08:29:15,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:15,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147131217] [2023-02-17 08:29:15,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147131217] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:15,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:15,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:29:15,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069935250] [2023-02-17 08:29:15,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:15,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:29:15,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:15,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:29:15,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:29:15,325 INFO L87 Difference]: Start difference. First operand 10144 states and 14242 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) [2023-02-17 08:29:15,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:15,487 INFO L93 Difference]: Finished difference Result 10140 states and 14042 transitions. [2023-02-17 08:29:15,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:29:15,488 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 [2023-02-17 08:29:15,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:15,502 INFO L225 Difference]: With dead ends: 10140 [2023-02-17 08:29:15,502 INFO L226 Difference]: Without dead ends: 10140 [2023-02-17 08:29:15,503 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 [2023-02-17 08:29:15,503 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 145 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:15,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 594 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 08:29:15,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10140 states. [2023-02-17 08:29:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10140 to 10140. [2023-02-17 08:29:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10140 states, 9687 states have (on average 1.3682254567977703) internal successors, (13254), 9865 states have internal predecessors, (13254), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-17 08:29:15,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10140 states to 10140 states and 14042 transitions. [2023-02-17 08:29:15,630 INFO L78 Accepts]: Start accepts. Automaton has 10140 states and 14042 transitions. Word has length 63 [2023-02-17 08:29:15,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:15,630 INFO L495 AbstractCegarLoop]: Abstraction has 10140 states and 14042 transitions. [2023-02-17 08:29:15,630 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) [2023-02-17 08:29:15,631 INFO L276 IsEmpty]: Start isEmpty. Operand 10140 states and 14042 transitions. [2023-02-17 08:29:15,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-17 08:29:15,631 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:15,632 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] [2023-02-17 08:29:15,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2023-02-17 08:29:15,632 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash -451244996, now seen corresponding path program 1 times [2023-02-17 08:29:15,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:15,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625698065] [2023-02-17 08:29:15,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:15,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:16,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:16,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:16,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625698065] [2023-02-17 08:29:16,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625698065] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:16,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156987857] [2023-02-17 08:29:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:16,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:16,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:16,317 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) [2023-02-17 08:29:16,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 08:29:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:16,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-17 08:29:16,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:16,698 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 [2023-02-17 08:29:16,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:16,740 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 [2023-02-17 08:29:16,858 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 39 treesize of output 15 [2023-02-17 08:29:16,894 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 52 [2023-02-17 08:29:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:16,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:19,085 WARN L837 $PredicateComparison]: unable to prove that (and (= ~unnamed1~0~LIST_BEG 0) (or (<= 0 (+ ~unnamed1~0~LIST_BEG (- 1))) (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (.cse1 (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* 4 ~unnamed1~0~LIST_END))) (.cse2 (+ |c_~#list~0.offset| (* 4 ~unnamed1~0~LIST_BEG)))) (and (forall ((v_ArrVal_1492 Int)) (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1492)) |c_~#list~0.base|) .cse2)))) (forall ((v_ArrVal_1492 Int)) (= (let ((.cse3 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store .cse0 .cse1 v_ArrVal_1492)) |c_~#list~0.base|) .cse2))) (store |c_#valid| .cse3 (select |c_ULTIMATE.start_main_old_#valid#1| .cse3))) |c_ULTIMATE.start_main_old_#valid#1|)))) (and (= (+ ~unnamed1~0~LIST_END (* (- 1) ~unnamed1~0~LIST_BEG)) 0) (= (+ ~unnamed1~0~LIST_END (- 1)) 0)) (<= ~unnamed1~0~LIST_BEG (- 1)))) is different from false [2023-02-17 08:29:19,102 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 130 treesize of output 122 [2023-02-17 08:29:19,119 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 166 treesize of output 150 [2023-02-17 08:29:21,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156987857] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:21,993 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:29:21,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12] total 28 [2023-02-17 08:29:21,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768692336] [2023-02-17 08:29:21,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:21,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-17 08:29:21,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:21,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-17 08:29:21,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1120, Unknown=1, NotChecked=68, Total=1332 [2023-02-17 08:29:21,995 INFO L87 Difference]: Start difference. First operand 10140 states and 14042 transitions. Second operand has 29 states, 28 states have (on average 4.142857142857143) internal successors, (116), 27 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) [2023-02-17 08:29:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:23,555 INFO L93 Difference]: Finished difference Result 10396 states and 14376 transitions. [2023-02-17 08:29:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 08:29:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.142857142857143) internal successors, (116), 27 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 [2023-02-17 08:29:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:23,573 INFO L225 Difference]: With dead ends: 10396 [2023-02-17 08:29:23,573 INFO L226 Difference]: Without dead ends: 10385 [2023-02-17 08:29:23,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=386, Invalid=1779, Unknown=1, NotChecked=90, Total=2256 [2023-02-17 08:29:23,574 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 1248 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 1211 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 1718 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:23,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 1718 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1211 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-17 08:29:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10385 states. [2023-02-17 08:29:23,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10385 to 10168. [2023-02-17 08:29:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10168 states, 9715 states have (on average 1.3678847143592383) internal successors, (13289), 9893 states have internal predecessors, (13289), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-17 08:29:23,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10168 states to 10168 states and 14077 transitions. [2023-02-17 08:29:23,721 INFO L78 Accepts]: Start accepts. Automaton has 10168 states and 14077 transitions. Word has length 63 [2023-02-17 08:29:23,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:23,722 INFO L495 AbstractCegarLoop]: Abstraction has 10168 states and 14077 transitions. [2023-02-17 08:29:23,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.142857142857143) internal successors, (116), 27 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) [2023-02-17 08:29:23,722 INFO L276 IsEmpty]: Start isEmpty. Operand 10168 states and 14077 transitions. [2023-02-17 08:29:23,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-17 08:29:23,723 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:23,723 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] [2023-02-17 08:29:23,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 08:29:23,930 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,SelfDestructingSolverStorable61 [2023-02-17 08:29:23,931 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:23,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:23,932 INFO L85 PathProgramCache]: Analyzing trace with hash -193079558, now seen corresponding path program 1 times [2023-02-17 08:29:23,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:23,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337857158] [2023-02-17 08:29:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:23,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:24,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:24,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:24,304 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:24,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:24,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337857158] [2023-02-17 08:29:24,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337857158] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:24,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592491523] [2023-02-17 08:29:24,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:24,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:24,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:24,306 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) [2023-02-17 08:29:24,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 08:29:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:24,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-17 08:29:24,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:24,655 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 [2023-02-17 08:29:24,764 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:29:24,765 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 [2023-02-17 08:29:24,786 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 39 [2023-02-17 08:29:24,801 WARN L859 $PredicateComparison]: unable to prove that (and (= (+ ~unnamed1~0~LIST_END (- 1)) 0) (let ((.cse1 (exists ((|v_ULTIMATE.start_main_~cursor~1#1.base_18| Int)) (= (select |c_#valid| |v_ULTIMATE.start_main_~cursor~1#1.base_18|) 0)))) (or (exists ((|v_ULTIMATE.start_main_~cursor~1#1.base_18| Int)) (let ((.cse0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~cursor~1#1.base_18|))) (and (= 0 .cse0) (= (select |c_#valid| |v_ULTIMATE.start_main_~cursor~1#1.base_18|) 0) (= (store |c_#valid| |v_ULTIMATE.start_main_~cursor~1#1.base_18| .cse0) |c_ULTIMATE.start_main_old_#valid#1|)))) (and .cse1 (<= ~unnamed1~0~LIST_END 0)) (and .cse1 (<= 0 (+ ~unnamed1~0~LIST_END (- 2))))))) is different from true [2023-02-17 08:29:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-02-17 08:29:24,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:24,901 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 52 treesize of output 44 [2023-02-17 08:29:24,908 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 74 treesize of output 58 [2023-02-17 08:29:26,917 WARN L837 $PredicateComparison]: unable to prove that (and (= (+ ~unnamed1~0~LIST_END (- 1)) 0) (or (let ((.cse0 (select |c_ULTIMATE.start_main_old_#valid#1| |c_ULTIMATE.start_append_one_~item~1#1.base|)) (.cse2 (= |c_~#list~0.base| |c_ULTIMATE.start_append_one_~list#1.base|)) (.cse1 (let ((.cse8 (* 4 ~unnamed1~0~LIST_END))) (= (+ |c_~#list~0.offset| .cse8) (+ |c_ULTIMATE.start_append_one_~list#1.offset| .cse8))))) (let ((.cse3 (not .cse1)) (.cse4 (not .cse2)) (.cse5 (forall ((v_antiDerIndex_entry0_2 Int) (v_arrayElimCell_26 Int)) (= (select (store |c_#valid| v_arrayElimCell_26 (select |c_ULTIMATE.start_main_old_#valid#1| v_arrayElimCell_26)) v_antiDerIndex_entry0_2) (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_2)))) (.cse6 (store |c_#valid| |c_ULTIMATE.start_append_one_~item~1#1.base| .cse0))) (and (or (and (= 0 .cse0) .cse1 .cse2) (and (forall ((v_arrayElimCell_25 Int)) (= 0 (select |c_ULTIMATE.start_main_old_#valid#1| v_arrayElimCell_25))) (or .cse3 .cse4))) (or .cse5 .cse1) (or .cse3 .cse4 (and .cse1 .cse2 (forall ((v_antiDerIndex_entry0_2 Int)) (= (select .cse6 v_antiDerIndex_entry0_2) (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_2))))) (or .cse5 .cse2) (forall ((v_antiDerIndex_entry0_2 Int) (v_arrayElimCell_26 Int)) (let ((.cse7 (select |c_ULTIMATE.start_main_old_#valid#1| v_antiDerIndex_entry0_2))) (or (= (select .cse6 v_antiDerIndex_entry0_2) .cse7) (= (select (store |c_#valid| v_arrayElimCell_26 (select |c_ULTIMATE.start_main_old_#valid#1| v_arrayElimCell_26)) v_antiDerIndex_entry0_2) .cse7))))))) (<= 0 (+ ~unnamed1~0~LIST_END (- 2))) (<= ~unnamed1~0~LIST_END 0))) is different from false [2023-02-17 08:29:27,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592491523] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:27,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:29:27,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-02-17 08:29:27,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211819104] [2023-02-17 08:29:27,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:27,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 08:29:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:27,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 08:29:27,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=715, Unknown=2, NotChecked=110, Total=930 [2023-02-17 08:29:27,329 INFO L87 Difference]: Start difference. First operand 10168 states and 14077 transitions. Second operand has 23 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 23 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) [2023-02-17 08:29:28,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:28,540 INFO L93 Difference]: Finished difference Result 10388 states and 14367 transitions. [2023-02-17 08:29:28,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 08:29:28,541 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 23 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 [2023-02-17 08:29:28,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:28,557 INFO L225 Difference]: With dead ends: 10388 [2023-02-17 08:29:28,557 INFO L226 Difference]: Without dead ends: 10375 [2023-02-17 08:29:28,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=327, Invalid=1239, Unknown=2, NotChecked=154, Total=1722 [2023-02-17 08:29:28,558 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 1061 mSDsluCounter, 1284 mSDsCounter, 0 mSdLazyCounter, 1028 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:28,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 1426 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1028 Invalid, 0 Unknown, 283 Unchecked, 0.9s Time] [2023-02-17 08:29:28,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10375 states. [2023-02-17 08:29:28,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10375 to 10166. [2023-02-17 08:29:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10166 states, 9713 states have (on average 1.3677545557500257) internal successors, (13285), 9891 states have internal predecessors, (13285), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-17 08:29:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10166 states to 10166 states and 14073 transitions. [2023-02-17 08:29:28,735 INFO L78 Accepts]: Start accepts. Automaton has 10166 states and 14073 transitions. Word has length 63 [2023-02-17 08:29:28,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:28,736 INFO L495 AbstractCegarLoop]: Abstraction has 10166 states and 14073 transitions. [2023-02-17 08:29:28,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.2727272727272725) internal successors, (116), 23 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) [2023-02-17 08:29:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 10166 states and 14073 transitions. [2023-02-17 08:29:28,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 08:29:28,737 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:28,737 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, 1] [2023-02-17 08:29:28,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-17 08:29:28,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:28,937 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:28,938 INFO L85 PathProgramCache]: Analyzing trace with hash -367739905, now seen corresponding path program 1 times [2023-02-17 08:29:28,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:28,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110001788] [2023-02-17 08:29:28,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:28,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:29,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:29,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:29:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:29,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:29:29,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:29,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110001788] [2023-02-17 08:29:29,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110001788] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:29,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:29,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-17 08:29:29,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314175521] [2023-02-17 08:29:29,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:29,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 08:29:29,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 08:29:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-17 08:29:29,294 INFO L87 Difference]: Start difference. First operand 10166 states and 14073 transitions. Second operand has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 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) [2023-02-17 08:29:30,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:30,091 INFO L93 Difference]: Finished difference Result 12407 states and 16929 transitions. [2023-02-17 08:29:30,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 08:29:30,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 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 64 [2023-02-17 08:29:30,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:30,114 INFO L225 Difference]: With dead ends: 12407 [2023-02-17 08:29:30,114 INFO L226 Difference]: Without dead ends: 12407 [2023-02-17 08:29:30,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2023-02-17 08:29:30,115 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 1034 mSDsluCounter, 1425 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:30,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1034 Valid, 1694 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 08:29:30,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12407 states. [2023-02-17 08:29:30,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12407 to 10166. [2023-02-17 08:29:30,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10166 states, 9713 states have (on average 1.3631215896221558) internal successors, (13240), 9891 states have internal predecessors, (13240), 394 states have call successors, (394), 24 states have call predecessors, (394), 24 states have return successors, (394), 250 states have call predecessors, (394), 394 states have call successors, (394) [2023-02-17 08:29:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10166 states to 10166 states and 14028 transitions. [2023-02-17 08:29:30,254 INFO L78 Accepts]: Start accepts. Automaton has 10166 states and 14028 transitions. Word has length 64 [2023-02-17 08:29:30,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:30,254 INFO L495 AbstractCegarLoop]: Abstraction has 10166 states and 14028 transitions. [2023-02-17 08:29:30,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.833333333333333) internal successors, (58), 13 states have internal predecessors, (58), 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) [2023-02-17 08:29:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 10166 states and 14028 transitions. [2023-02-17 08:29:30,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 08:29:30,255 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:30,255 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2023-02-17 08:29:30,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2023-02-17 08:29:30,256 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:30,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:30,256 INFO L85 PathProgramCache]: Analyzing trace with hash -966158781, now seen corresponding path program 1 times [2023-02-17 08:29:30,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:30,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494428834] [2023-02-17 08:29:30,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:30,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:31,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:31,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 08:29:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:29:31,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:31,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494428834] [2023-02-17 08:29:31,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494428834] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:31,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826318459] [2023-02-17 08:29:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:31,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:31,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:31,097 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) [2023-02-17 08:29:31,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 08:29:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:31,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-17 08:29:31,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:31,431 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 [2023-02-17 08:29:31,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:31,463 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 [2023-02-17 08:29:31,691 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 34 treesize of output 22 [2023-02-17 08:29:31,694 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 19 [2023-02-17 08:29:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:31,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:31,849 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:31,850 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 44 treesize of output 48 [2023-02-17 08:29:32,109 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 310 treesize of output 294 [2023-02-17 08:29:32,920 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:29:32,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826318459] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:29:32,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:29:32,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 49 [2023-02-17 08:29:32,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948151877] [2023-02-17 08:29:32,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:32,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-17 08:29:32,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:32,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-17 08:29:32,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2246, Unknown=0, NotChecked=0, Total=2450 [2023-02-17 08:29:32,923 INFO L87 Difference]: Start difference. First operand 10166 states and 14028 transitions. Second operand has 50 states, 49 states have (on average 3.63265306122449) internal successors, (178), 47 states have internal predecessors, (178), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 08:29:38,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:38,573 INFO L93 Difference]: Finished difference Result 28840 states and 40583 transitions. [2023-02-17 08:29:38,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-17 08:29:38,574 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.63265306122449) internal successors, (178), 47 states have internal predecessors, (178), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 64 [2023-02-17 08:29:38,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:38,630 INFO L225 Difference]: With dead ends: 28840 [2023-02-17 08:29:38,631 INFO L226 Difference]: Without dead ends: 28840 [2023-02-17 08:29:38,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4958 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2710, Invalid=13802, Unknown=0, NotChecked=0, Total=16512 [2023-02-17 08:29:38,632 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 9840 mSDsluCounter, 5192 mSDsCounter, 0 mSdLazyCounter, 3668 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9841 SdHoareTripleChecker+Valid, 5414 SdHoareTripleChecker+Invalid, 4287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 3668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:38,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9841 Valid, 5414 Invalid, 4287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 3668 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-02-17 08:29:38,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28840 states. [2023-02-17 08:29:38,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28840 to 10610. [2023-02-17 08:29:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10147 states have (on average 1.363851384645708) internal successors, (13839), 10324 states have internal predecessors, (13839), 404 states have call successors, (404), 25 states have call predecessors, (404), 25 states have return successors, (404), 260 states have call predecessors, (404), 404 states have call successors, (404) [2023-02-17 08:29:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 14647 transitions. [2023-02-17 08:29:38,892 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 14647 transitions. Word has length 64 [2023-02-17 08:29:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:38,892 INFO L495 AbstractCegarLoop]: Abstraction has 10610 states and 14647 transitions. [2023-02-17 08:29:38,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.63265306122449) internal successors, (178), 47 states have internal predecessors, (178), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 08:29:38,893 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 14647 transitions. [2023-02-17 08:29:38,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-17 08:29:38,894 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:38,894 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2023-02-17 08:29:38,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 08:29:39,101 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,SelfDestructingSolverStorable64 [2023-02-17 08:29:39,101 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:39,101 INFO L85 PathProgramCache]: Analyzing trace with hash -966158782, now seen corresponding path program 1 times [2023-02-17 08:29:39,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:39,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554594543] [2023-02-17 08:29:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:39,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:39,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:39,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 08:29:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:39,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 08:29:39,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:39,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554594543] [2023-02-17 08:29:39,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554594543] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:39,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:39,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 08:29:39,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324609944] [2023-02-17 08:29:39,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:39,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 08:29:39,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:39,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 08:29:39,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 08:29:39,176 INFO L87 Difference]: Start difference. First operand 10610 states and 14647 transitions. Second operand has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 08:29:39,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:39,414 INFO L93 Difference]: Finished difference Result 16310 states and 22414 transitions. [2023-02-17 08:29:39,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 08:29:39,417 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-02-17 08:29:39,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:39,442 INFO L225 Difference]: With dead ends: 16310 [2023-02-17 08:29:39,443 INFO L226 Difference]: Without dead ends: 16310 [2023-02-17 08:29:39,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:29:39,443 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 120 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 725 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:39,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 725 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:29:39,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16310 states. [2023-02-17 08:29:39,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16310 to 10608. [2023-02-17 08:29:39,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10147 states have (on average 1.3526165369074603) internal successors, (13725), 10322 states have internal predecessors, (13725), 404 states have call successors, (404), 25 states have call predecessors, (404), 25 states have return successors, (404), 260 states have call predecessors, (404), 404 states have call successors, (404) [2023-02-17 08:29:39,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 14533 transitions. [2023-02-17 08:29:39,604 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 14533 transitions. Word has length 64 [2023-02-17 08:29:39,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:39,604 INFO L495 AbstractCegarLoop]: Abstraction has 10608 states and 14533 transitions. [2023-02-17 08:29:39,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 9.6) internal successors, (48), 6 states have internal predecessors, (48), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 08:29:39,604 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 14533 transitions. [2023-02-17 08:29:39,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-17 08:29:39,605 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:39,605 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, 1, 1] [2023-02-17 08:29:39,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2023-02-17 08:29:39,606 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:39,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:39,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1485673092, now seen corresponding path program 1 times [2023-02-17 08:29:39,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:39,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116013033] [2023-02-17 08:29:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:39,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:40,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:40,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:29:40,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:40,402 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:29:40,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:40,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116013033] [2023-02-17 08:29:40,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116013033] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:40,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077137448] [2023-02-17 08:29:40,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:40,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:40,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:40,405 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) [2023-02-17 08:29:40,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 08:29:40,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:40,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-17 08:29:40,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:40,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 6 treesize of output 5 [2023-02-17 08:29:40,717 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 [2023-02-17 08:29:40,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:40,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:40,805 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:29:40,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 35 [2023-02-17 08:29:40,905 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 37 treesize of output 13 [2023-02-17 08:29:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:40,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:29:40,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077137448] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:40,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:29:40,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13] total 27 [2023-02-17 08:29:40,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260826442] [2023-02-17 08:29:40,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:40,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 08:29:40,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:40,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 08:29:40,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2023-02-17 08:29:40,947 INFO L87 Difference]: Start difference. First operand 10608 states and 14533 transitions. Second operand has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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) [2023-02-17 08:29:41,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:41,904 INFO L93 Difference]: Finished difference Result 12252 states and 16982 transitions. [2023-02-17 08:29:41,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 08:29:41,905 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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 65 [2023-02-17 08:29:41,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:41,923 INFO L225 Difference]: With dead ends: 12252 [2023-02-17 08:29:41,923 INFO L226 Difference]: Without dead ends: 12252 [2023-02-17 08:29:41,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=306, Invalid=1334, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 08:29:41,926 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 1051 mSDsluCounter, 1598 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1051 SdHoareTripleChecker+Valid, 1782 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:41,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1051 Valid, 1782 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 08:29:41,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12252 states. [2023-02-17 08:29:42,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12252 to 10827. [2023-02-17 08:29:42,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10827 states, 10366 states have (on average 1.361084314103801) internal successors, (14109), 10541 states have internal predecessors, (14109), 404 states have call successors, (404), 25 states have call predecessors, (404), 25 states have return successors, (404), 260 states have call predecessors, (404), 404 states have call successors, (404) [2023-02-17 08:29:42,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10827 states to 10827 states and 14917 transitions. [2023-02-17 08:29:42,068 INFO L78 Accepts]: Start accepts. Automaton has 10827 states and 14917 transitions. Word has length 65 [2023-02-17 08:29:42,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:42,069 INFO L495 AbstractCegarLoop]: Abstraction has 10827 states and 14917 transitions. [2023-02-17 08:29:42,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 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) [2023-02-17 08:29:42,069 INFO L276 IsEmpty]: Start isEmpty. Operand 10827 states and 14917 transitions. [2023-02-17 08:29:42,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-17 08:29:42,070 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:42,070 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, 1, 1] [2023-02-17 08:29:42,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 08:29:42,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-02-17 08:29:42,277 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:42,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:42,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1485673093, now seen corresponding path program 1 times [2023-02-17 08:29:42,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:42,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598712536] [2023-02-17 08:29:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:42,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:42,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:42,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:29:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:29:42,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:42,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598712536] [2023-02-17 08:29:42,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598712536] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:42,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:42,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-17 08:29:42,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102612654] [2023-02-17 08:29:42,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:42,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 08:29:42,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 08:29:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-17 08:29:42,828 INFO L87 Difference]: Start difference. First operand 10827 states and 14917 transitions. Second operand has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:29:43,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:43,296 INFO L93 Difference]: Finished difference Result 12111 states and 16427 transitions. [2023-02-17 08:29:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 08:29:43,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2023-02-17 08:29:43,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:43,311 INFO L225 Difference]: With dead ends: 12111 [2023-02-17 08:29:43,311 INFO L226 Difference]: Without dead ends: 12111 [2023-02-17 08:29:43,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2023-02-17 08:29:43,312 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 685 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 689 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:43,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [689 Valid, 1162 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 08:29:43,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12111 states. [2023-02-17 08:29:43,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12111 to 10792. [2023-02-17 08:29:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10792 states, 10331 states have (on average 1.3553383021972703) internal successors, (14002), 10506 states have internal predecessors, (14002), 404 states have call successors, (404), 25 states have call predecessors, (404), 25 states have return successors, (404), 260 states have call predecessors, (404), 404 states have call successors, (404) [2023-02-17 08:29:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10792 states to 10792 states and 14810 transitions. [2023-02-17 08:29:43,430 INFO L78 Accepts]: Start accepts. Automaton has 10792 states and 14810 transitions. Word has length 65 [2023-02-17 08:29:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:43,430 INFO L495 AbstractCegarLoop]: Abstraction has 10792 states and 14810 transitions. [2023-02-17 08:29:43,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.555555555555555) internal successors, (59), 9 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:29:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 10792 states and 14810 transitions. [2023-02-17 08:29:43,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-17 08:29:43,431 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:43,431 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, 1, 1] [2023-02-17 08:29:43,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2023-02-17 08:29:43,432 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:43,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:43,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1484965091, now seen corresponding path program 1 times [2023-02-17 08:29:43,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:43,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375575536] [2023-02-17 08:29:43,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:43,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:43,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:43,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:29:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:43,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:29:43,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:43,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375575536] [2023-02-17 08:29:43,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375575536] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:43,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:43,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-17 08:29:43,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650900426] [2023-02-17 08:29:43,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:43,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 08:29:43,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:43,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 08:29:43,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-17 08:29:43,800 INFO L87 Difference]: Start difference. First operand 10792 states and 14810 transitions. Second operand has 11 states, 10 states have (on average 5.9) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:29:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:44,272 INFO L93 Difference]: Finished difference Result 11688 states and 15870 transitions. [2023-02-17 08:29:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 08:29:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2023-02-17 08:29:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:44,286 INFO L225 Difference]: With dead ends: 11688 [2023-02-17 08:29:44,287 INFO L226 Difference]: Without dead ends: 11688 [2023-02-17 08:29:44,287 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2023-02-17 08:29:44,287 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 1095 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 884 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:44,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1095 Valid, 884 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 08:29:44,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11688 states. [2023-02-17 08:29:44,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11688 to 10792. [2023-02-17 08:29:44,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10792 states, 10331 states have (on average 1.3509824799148196) internal successors, (13957), 10506 states have internal predecessors, (13957), 404 states have call successors, (404), 25 states have call predecessors, (404), 25 states have return successors, (404), 260 states have call predecessors, (404), 404 states have call successors, (404) [2023-02-17 08:29:44,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10792 states to 10792 states and 14765 transitions. [2023-02-17 08:29:44,410 INFO L78 Accepts]: Start accepts. Automaton has 10792 states and 14765 transitions. Word has length 65 [2023-02-17 08:29:44,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:44,411 INFO L495 AbstractCegarLoop]: Abstraction has 10792 states and 14765 transitions. [2023-02-17 08:29:44,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.9) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:29:44,411 INFO L276 IsEmpty]: Start isEmpty. Operand 10792 states and 14765 transitions. [2023-02-17 08:29:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-17 08:29:44,412 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:44,412 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, 1, 1, 1] [2023-02-17 08:29:44,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2023-02-17 08:29:44,412 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:44,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:44,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1210722175, now seen corresponding path program 1 times [2023-02-17 08:29:44,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:44,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292301512] [2023-02-17 08:29:44,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:44,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:44,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:44,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:29:44,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:29:44,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:44,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292301512] [2023-02-17 08:29:44,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292301512] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:44,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:29:44,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-17 08:29:44,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795030448] [2023-02-17 08:29:44,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:44,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 08:29:44,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:44,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 08:29:44,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-02-17 08:29:44,784 INFO L87 Difference]: Start difference. First operand 10792 states and 14765 transitions. Second operand has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:29:45,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:45,802 INFO L93 Difference]: Finished difference Result 13006 states and 17822 transitions. [2023-02-17 08:29:45,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 08:29:45,803 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2023-02-17 08:29:45,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:45,818 INFO L225 Difference]: With dead ends: 13006 [2023-02-17 08:29:45,818 INFO L226 Difference]: Without dead ends: 13006 [2023-02-17 08:29:45,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2023-02-17 08:29:45,818 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 968 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 970 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:45,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [970 Valid, 1683 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 08:29:45,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13006 states. [2023-02-17 08:29:45,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13006 to 10990. [2023-02-17 08:29:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10990 states, 10529 states have (on average 1.3537847848798557) internal successors, (14254), 10704 states have internal predecessors, (14254), 404 states have call successors, (404), 25 states have call predecessors, (404), 25 states have return successors, (404), 260 states have call predecessors, (404), 404 states have call successors, (404) [2023-02-17 08:29:45,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10990 states to 10990 states and 15062 transitions. [2023-02-17 08:29:45,940 INFO L78 Accepts]: Start accepts. Automaton has 10990 states and 15062 transitions. Word has length 66 [2023-02-17 08:29:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:45,941 INFO L495 AbstractCegarLoop]: Abstraction has 10990 states and 15062 transitions. [2023-02-17 08:29:45,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.615384615384615) internal successors, (60), 14 states have internal predecessors, (60), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:29:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 10990 states and 15062 transitions. [2023-02-17 08:29:45,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-17 08:29:45,943 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:45,943 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, 1, 1, 1, 1] [2023-02-17 08:29:45,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2023-02-17 08:29:45,943 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:45,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1122318501, now seen corresponding path program 1 times [2023-02-17 08:29:45,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:45,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377880578] [2023-02-17 08:29:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:45,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:46,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:46,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:29:46,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:29:46,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377880578] [2023-02-17 08:29:46,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377880578] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320822517] [2023-02-17 08:29:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:46,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:46,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:46,445 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) [2023-02-17 08:29:46,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 08:29:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:46,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-17 08:29:46,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:46,624 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:46,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2023-02-17 08:29:46,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2023-02-17 08:29:46,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:46,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:46,780 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:29:46,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 34 [2023-02-17 08:29:46,842 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 36 treesize of output 12 [2023-02-17 08:29:46,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 12 treesize of output 14 [2023-02-17 08:29:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:46,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 08:29:46,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320822517] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:29:46,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 08:29:46,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 26 [2023-02-17 08:29:46,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415189657] [2023-02-17 08:29:46,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:29:46,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 08:29:46,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:46,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 08:29:46,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2023-02-17 08:29:46,890 INFO L87 Difference]: Start difference. First operand 10990 states and 15062 transitions. Second operand has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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) [2023-02-17 08:29:48,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:29:48,393 INFO L93 Difference]: Finished difference Result 23785 states and 32747 transitions. [2023-02-17 08:29:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-17 08:29:48,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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 67 [2023-02-17 08:29:48,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:29:48,431 INFO L225 Difference]: With dead ends: 23785 [2023-02-17 08:29:48,431 INFO L226 Difference]: Without dead ends: 23785 [2023-02-17 08:29:48,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=813, Invalid=2969, Unknown=0, NotChecked=0, Total=3782 [2023-02-17 08:29:48,432 INFO L413 NwaCegarLoop]: 261 mSDtfsCounter, 1847 mSDsluCounter, 1907 mSDsCounter, 0 mSdLazyCounter, 1417 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1847 SdHoareTripleChecker+Valid, 2168 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 08:29:48,432 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1847 Valid, 2168 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1417 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 08:29:48,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23785 states. [2023-02-17 08:29:48,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23785 to 17836. [2023-02-17 08:29:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17836 states, 17083 states have (on average 1.3420944798922905) internal successors, (22927), 17350 states have internal predecessors, (22927), 676 states have call successors, (676), 45 states have call predecessors, (676), 45 states have return successors, (676), 440 states have call predecessors, (676), 676 states have call successors, (676) [2023-02-17 08:29:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17836 states to 17836 states and 24279 transitions. [2023-02-17 08:29:48,666 INFO L78 Accepts]: Start accepts. Automaton has 17836 states and 24279 transitions. Word has length 67 [2023-02-17 08:29:48,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:29:48,666 INFO L495 AbstractCegarLoop]: Abstraction has 17836 states and 24279 transitions. [2023-02-17 08:29:48,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 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) [2023-02-17 08:29:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 17836 states and 24279 transitions. [2023-02-17 08:29:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-17 08:29:48,668 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:29:48,668 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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] [2023-02-17 08:29:48,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 08:29:48,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:48,874 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:29:48,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:29:48,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1714217293, now seen corresponding path program 1 times [2023-02-17 08:29:48,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:29:48,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697330535] [2023-02-17 08:29:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:48,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:29:48,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:50,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:29:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:50,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 08:29:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:29:50,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:29:50,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697330535] [2023-02-17 08:29:50,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697330535] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:50,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992038848] [2023-02-17 08:29:50,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:29:50,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:29:50,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:29:50,701 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) [2023-02-17 08:29:50,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 08:29:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:29:50,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 118 conjunts are in the unsatisfiable core [2023-02-17 08:29:50,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:29:50,895 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:50,896 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 15 [2023-02-17 08:29:51,002 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 [2023-02-17 08:29:51,005 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 [2023-02-17 08:29:51,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:51,097 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-17 08:29:51,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:51,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-17 08:29:51,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:51,153 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 [2023-02-17 08:29:51,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:51,161 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 [2023-02-17 08:29:51,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:51,209 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 18 treesize of output 20 [2023-02-17 08:29:51,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:51,212 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 18 treesize of output 20 [2023-02-17 08:29:51,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:51,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2023-02-17 08:29:51,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:51,362 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 35 treesize of output 34 [2023-02-17 08:29:51,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:51,429 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:29:51,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:51,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 75 [2023-02-17 08:29:51,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:51,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 48 [2023-02-17 08:29:51,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:51,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:29:51,969 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:29:51,969 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:29:51,970 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:29:51,970 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:51,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 141 treesize of output 79 [2023-02-17 08:29:51,974 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:29:51,974 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:29:51,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 29 [2023-02-17 08:29:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:29:52,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:29:52,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992038848] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:29:52,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:29:52,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 22] total 47 [2023-02-17 08:29:52,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850704614] [2023-02-17 08:29:52,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:29:52,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-17 08:29:52,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:29:52,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-17 08:29:52,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2581, Unknown=0, NotChecked=0, Total=2756 [2023-02-17 08:29:52,729 INFO L87 Difference]: Start difference. First operand 17836 states and 24279 transitions. Second operand has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 45 states have internal predecessors, (114), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 08:30:00,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:00,983 INFO L93 Difference]: Finished difference Result 44104 states and 60461 transitions. [2023-02-17 08:30:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-17 08:30:00,984 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 45 states have internal predecessors, (114), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 67 [2023-02-17 08:30:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:01,035 INFO L225 Difference]: With dead ends: 44104 [2023-02-17 08:30:01,036 INFO L226 Difference]: Without dead ends: 44104 [2023-02-17 08:30:01,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 59 SyntacticMatches, 12 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1762, Invalid=13244, Unknown=0, NotChecked=0, Total=15006 [2023-02-17 08:30:01,037 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 7879 mSDsluCounter, 5432 mSDsCounter, 0 mSdLazyCounter, 4802 mSolverCounterSat, 387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7880 SdHoareTripleChecker+Valid, 5597 SdHoareTripleChecker+Invalid, 5189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 387 IncrementalHoareTripleChecker+Valid, 4802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:01,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7880 Valid, 5597 Invalid, 5189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [387 Valid, 4802 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-02-17 08:30:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44104 states. [2023-02-17 08:30:01,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44104 to 29247. [2023-02-17 08:30:01,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29247 states, 27986 states have (on average 1.335775030372329) internal successors, (37383), 28399 states have internal predecessors, (37383), 1150 states have call successors, (1150), 79 states have call predecessors, (1150), 79 states have return successors, (1150), 768 states have call predecessors, (1150), 1150 states have call successors, (1150) [2023-02-17 08:30:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29247 states to 29247 states and 39683 transitions. [2023-02-17 08:30:01,438 INFO L78 Accepts]: Start accepts. Automaton has 29247 states and 39683 transitions. Word has length 67 [2023-02-17 08:30:01,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:01,438 INFO L495 AbstractCegarLoop]: Abstraction has 29247 states and 39683 transitions. [2023-02-17 08:30:01,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.425531914893617) internal successors, (114), 45 states have internal predecessors, (114), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 08:30:01,439 INFO L276 IsEmpty]: Start isEmpty. Operand 29247 states and 39683 transitions. [2023-02-17 08:30:01,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-17 08:30:01,440 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:01,440 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, 1, 1, 1, 1, 1] [2023-02-17 08:30:01,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 08:30:01,640 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,SelfDestructingSolverStorable71 [2023-02-17 08:30:01,640 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:30:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:01,641 INFO L85 PathProgramCache]: Analyzing trace with hash 432135427, now seen corresponding path program 1 times [2023-02-17 08:30:01,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:01,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022765890] [2023-02-17 08:30:01,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:01,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:01,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:30:01,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:01,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:30:01,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:30:01,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:01,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022765890] [2023-02-17 08:30:01,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022765890] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:30:01,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:30:01,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 08:30:01,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308521630] [2023-02-17 08:30:01,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:30:01,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:30:01,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:30:01,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:30:01,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:30:01,796 INFO L87 Difference]: Start difference. First operand 29247 states and 39683 transitions. Second operand has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:30:02,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:02,082 INFO L93 Difference]: Finished difference Result 41372 states and 56167 transitions. [2023-02-17 08:30:02,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 08:30:02,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2023-02-17 08:30:02,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:02,142 INFO L225 Difference]: With dead ends: 41372 [2023-02-17 08:30:02,142 INFO L226 Difference]: Without dead ends: 41372 [2023-02-17 08:30:02,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-17 08:30:02,142 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 682 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:02,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [684 Valid, 567 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 08:30:02,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41372 states. [2023-02-17 08:30:02,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41372 to 29246. [2023-02-17 08:30:02,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29246 states, 27986 states have (on average 1.3270206531837347) internal successors, (37138), 28398 states have internal predecessors, (37138), 1150 states have call successors, (1150), 79 states have call predecessors, (1150), 79 states have return successors, (1150), 768 states have call predecessors, (1150), 1150 states have call successors, (1150) [2023-02-17 08:30:02,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29246 states to 29246 states and 39438 transitions. [2023-02-17 08:30:02,589 INFO L78 Accepts]: Start accepts. Automaton has 29246 states and 39438 transitions. Word has length 68 [2023-02-17 08:30:02,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:02,589 INFO L495 AbstractCegarLoop]: Abstraction has 29246 states and 39438 transitions. [2023-02-17 08:30:02,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.857142857142858) internal successors, (62), 8 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 08:30:02,589 INFO L276 IsEmpty]: Start isEmpty. Operand 29246 states and 39438 transitions. [2023-02-17 08:30:02,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-17 08:30:02,590 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:02,590 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:30:02,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2023-02-17 08:30:02,590 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:30:02,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:02,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2031100329, now seen corresponding path program 1 times [2023-02-17 08:30:02,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:02,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544886994] [2023-02-17 08:30:02,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:02,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:02,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:02,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:30:02,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:02,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:30:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 08:30:02,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:02,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544886994] [2023-02-17 08:30:02,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544886994] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:30:02,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586087826] [2023-02-17 08:30:02,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:02,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:02,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:30:02,650 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) [2023-02-17 08:30:02,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 08:30:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:02,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 08:30:02,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:30:02,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 08:30:02,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:30:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 08:30:02,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586087826] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:30:02,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:30:02,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-17 08:30:02,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745781712] [2023-02-17 08:30:02,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:30:02,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 08:30:02,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:30:02,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 08:30:02,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-17 08:30:02,856 INFO L87 Difference]: Start difference. First operand 29246 states and 39438 transitions. Second operand has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 08:30:03,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:03,011 INFO L93 Difference]: Finished difference Result 58383 states and 80553 transitions. [2023-02-17 08:30:03,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 08:30:03,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2023-02-17 08:30:03,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:03,099 INFO L225 Difference]: With dead ends: 58383 [2023-02-17 08:30:03,099 INFO L226 Difference]: Without dead ends: 58383 [2023-02-17 08:30:03,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-02-17 08:30:03,100 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 369 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:03,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 683 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:30:03,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58383 states. [2023-02-17 08:30:03,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58383 to 49915. [2023-02-17 08:30:03,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49915 states, 47726 states have (on average 1.355131374931903) internal successors, (64675), 48138 states have internal predecessors, (64675), 2079 states have call successors, (2079), 79 states have call predecessors, (2079), 79 states have return successors, (2079), 1697 states have call predecessors, (2079), 2079 states have call successors, (2079) [2023-02-17 08:30:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49915 states to 49915 states and 68833 transitions. [2023-02-17 08:30:03,708 INFO L78 Accepts]: Start accepts. Automaton has 49915 states and 68833 transitions. Word has length 75 [2023-02-17 08:30:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:03,708 INFO L495 AbstractCegarLoop]: Abstraction has 49915 states and 68833 transitions. [2023-02-17 08:30:03,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 3 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 08:30:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 49915 states and 68833 transitions. [2023-02-17 08:30:03,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-17 08:30:03,710 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:03,710 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:30:03,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 08:30:03,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:03,916 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:30:03,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:03,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1444294315, now seen corresponding path program 1 times [2023-02-17 08:30:03,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:03,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521643435] [2023-02-17 08:30:03,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:03,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:04,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:30:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:04,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:30:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:30:04,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:04,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521643435] [2023-02-17 08:30:04,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521643435] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:30:04,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:30:04,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-17 08:30:04,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906767703] [2023-02-17 08:30:04,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:30:04,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 08:30:04,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:30:04,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 08:30:04,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-02-17 08:30:04,420 INFO L87 Difference]: Start difference. First operand 49915 states and 68833 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 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) [2023-02-17 08:30:05,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:05,595 INFO L93 Difference]: Finished difference Result 63611 states and 86461 transitions. [2023-02-17 08:30:05,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-17 08:30:05,595 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 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 75 [2023-02-17 08:30:05,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:05,681 INFO L225 Difference]: With dead ends: 63611 [2023-02-17 08:30:05,681 INFO L226 Difference]: Without dead ends: 63611 [2023-02-17 08:30:05,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2023-02-17 08:30:05,681 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 1899 mSDsluCounter, 2004 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1899 SdHoareTripleChecker+Valid, 2271 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:05,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1899 Valid, 2271 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 08:30:05,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63611 states. [2023-02-17 08:30:06,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63611 to 40666. [2023-02-17 08:30:06,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40666 states, 38919 states have (on average 1.3575117551838434) internal successors, (52833), 39339 states have internal predecessors, (52833), 1637 states have call successors, (1637), 79 states have call predecessors, (1637), 79 states have return successors, (1637), 1247 states have call predecessors, (1637), 1637 states have call successors, (1637) [2023-02-17 08:30:06,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40666 states to 40666 states and 56107 transitions. [2023-02-17 08:30:06,204 INFO L78 Accepts]: Start accepts. Automaton has 40666 states and 56107 transitions. Word has length 75 [2023-02-17 08:30:06,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:06,204 INFO L495 AbstractCegarLoop]: Abstraction has 40666 states and 56107 transitions. [2023-02-17 08:30:06,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 15 states have internal predecessors, (69), 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) [2023-02-17 08:30:06,205 INFO L276 IsEmpty]: Start isEmpty. Operand 40666 states and 56107 transitions. [2023-02-17 08:30:06,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-17 08:30:06,206 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:06,206 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:30:06,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2023-02-17 08:30:06,206 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:30:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:06,206 INFO L85 PathProgramCache]: Analyzing trace with hash 815319307, now seen corresponding path program 1 times [2023-02-17 08:30:06,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:06,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823674480] [2023-02-17 08:30:06,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:06,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:06,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:30:06,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:06,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:30:06,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:06,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-02-17 08:30:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:06,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 08:30:06,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:06,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823674480] [2023-02-17 08:30:06,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823674480] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:30:06,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285308339] [2023-02-17 08:30:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:06,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:06,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:30:06,361 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) [2023-02-17 08:30:06,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 08:30:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:06,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 08:30:06,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:30:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 08:30:06,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:30:06,657 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:30:06,658 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 16 [2023-02-17 08:30:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 08:30:06,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285308339] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:30:06,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:30:06,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2023-02-17 08:30:06,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061963032] [2023-02-17 08:30:06,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:30:06,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 08:30:06,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:30:06,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 08:30:06,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-02-17 08:30:06,665 INFO L87 Difference]: Start difference. First operand 40666 states and 56107 transitions. Second operand has 12 states, 11 states have (on average 13.090909090909092) internal successors, (144), 12 states have internal predecessors, (144), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 08:30:07,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:07,418 INFO L93 Difference]: Finished difference Result 98441 states and 131510 transitions. [2023-02-17 08:30:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 08:30:07,419 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 13.090909090909092) internal successors, (144), 12 states have internal predecessors, (144), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 81 [2023-02-17 08:30:07,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:07,583 INFO L225 Difference]: With dead ends: 98441 [2023-02-17 08:30:07,583 INFO L226 Difference]: Without dead ends: 98441 [2023-02-17 08:30:07,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 166 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2023-02-17 08:30:07,583 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 2896 mSDsluCounter, 697 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2898 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:07,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2898 Valid, 960 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 08:30:07,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98441 states. [2023-02-17 08:30:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98441 to 50485. [2023-02-17 08:30:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50485 states, 48142 states have (on average 1.282019857920319) internal successors, (61719), 48709 states have internal predecessors, (61719), 2210 states have call successors, (2210), 108 states have call predecessors, (2210), 108 states have return successors, (2210), 1667 states have call predecessors, (2210), 2210 states have call successors, (2210) [2023-02-17 08:30:08,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50485 states to 50485 states and 66139 transitions. [2023-02-17 08:30:08,345 INFO L78 Accepts]: Start accepts. Automaton has 50485 states and 66139 transitions. Word has length 81 [2023-02-17 08:30:08,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:08,345 INFO L495 AbstractCegarLoop]: Abstraction has 50485 states and 66139 transitions. [2023-02-17 08:30:08,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 13.090909090909092) internal successors, (144), 12 states have internal predecessors, (144), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-17 08:30:08,345 INFO L276 IsEmpty]: Start isEmpty. Operand 50485 states and 66139 transitions. [2023-02-17 08:30:08,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-17 08:30:08,347 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:08,347 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:30:08,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 08:30:08,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:08,548 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:30:08,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:08,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1833977665, now seen corresponding path program 1 times [2023-02-17 08:30:08,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:08,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150480662] [2023-02-17 08:30:08,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:08,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:08,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:30:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:08,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:30:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 08:30:08,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:08,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150480662] [2023-02-17 08:30:08,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150480662] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 08:30:08,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 08:30:08,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 08:30:08,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565520221] [2023-02-17 08:30:08,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 08:30:08,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 08:30:08,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:30:08,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 08:30:08,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:30:08,674 INFO L87 Difference]: Start difference. First operand 50485 states and 66139 transitions. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 08:30:08,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:08,777 INFO L93 Difference]: Finished difference Result 38857 states and 51872 transitions. [2023-02-17 08:30:08,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 08:30:08,778 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 86 [2023-02-17 08:30:08,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:08,852 INFO L225 Difference]: With dead ends: 38857 [2023-02-17 08:30:08,853 INFO L226 Difference]: Without dead ends: 38857 [2023-02-17 08:30:08,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 08:30:08,853 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 135 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:08,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 518 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:30:08,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38857 states. [2023-02-17 08:30:09,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38857 to 28277. [2023-02-17 08:30:09,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28277 states, 26970 states have (on average 1.2884686688913607) internal successors, (34750), 27293 states have internal predecessors, (34750), 1225 states have call successors, (1225), 57 states have call predecessors, (1225), 57 states have return successors, (1225), 926 states have call predecessors, (1225), 1225 states have call successors, (1225) [2023-02-17 08:30:09,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28277 states to 28277 states and 37200 transitions. [2023-02-17 08:30:09,805 INFO L78 Accepts]: Start accepts. Automaton has 28277 states and 37200 transitions. Word has length 86 [2023-02-17 08:30:09,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:09,805 INFO L495 AbstractCegarLoop]: Abstraction has 28277 states and 37200 transitions. [2023-02-17 08:30:09,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 08:30:09,805 INFO L276 IsEmpty]: Start isEmpty. Operand 28277 states and 37200 transitions. [2023-02-17 08:30:09,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-17 08:30:09,807 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:09,808 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:30:09,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2023-02-17 08:30:09,808 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:30:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash 666817189, now seen corresponding path program 1 times [2023-02-17 08:30:09,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:09,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446846570] [2023-02-17 08:30:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:09,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:09,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:09,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:30:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:09,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:30:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:09,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 08:30:09,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:09,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446846570] [2023-02-17 08:30:09,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446846570] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:30:09,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308415085] [2023-02-17 08:30:09,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:09,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:09,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:30:09,961 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) [2023-02-17 08:30:09,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 08:30:10,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:10,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-17 08:30:10,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:30:10,312 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 [2023-02-17 08:30:10,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:10,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:10,374 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:30:10,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 41 [2023-02-17 08:30:10,395 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 28 treesize of output 17 [2023-02-17 08:30:10,433 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 51 treesize of output 19 [2023-02-17 08:30:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:30:10,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:30:10,538 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2501 Int)) (= (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ |c_ULTIMATE.start_append_one_~list#1.offset| (* 4 ~unnamed1~0~LIST_END)) v_ArrVal_2501)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* 4 ~unnamed1~0~LIST_BEG))) 0) |c_ULTIMATE.start_main_old_#valid#1|)) is different from false [2023-02-17 08:30:10,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:30:10,579 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 173 [2023-02-17 08:30:10,585 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:30:10,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-02-17 08:30:10,593 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:30:10,597 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:30:10,597 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 93 treesize of output 97 [2023-02-17 08:30:22,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308415085] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:30:22,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 08:30:22,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 14] total 19 [2023-02-17 08:30:22,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923244085] [2023-02-17 08:30:22,674 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 08:30:22,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-17 08:30:22,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:30:22,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-17 08:30:22,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=769, Unknown=2, NotChecked=56, Total=930 [2023-02-17 08:30:22,675 INFO L87 Difference]: Start difference. First operand 28277 states and 37200 transitions. Second operand has 19 states, 19 states have (on average 8.526315789473685) internal successors, (162), 19 states have internal predecessors, (162), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 08:30:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:25,315 INFO L93 Difference]: Finished difference Result 37751 states and 49962 transitions. [2023-02-17 08:30:25,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 08:30:25,316 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.526315789473685) internal successors, (162), 19 states have internal predecessors, (162), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 87 [2023-02-17 08:30:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:25,363 INFO L225 Difference]: With dead ends: 37751 [2023-02-17 08:30:25,364 INFO L226 Difference]: Without dead ends: 37744 [2023-02-17 08:30:25,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=625, Invalid=2457, Unknown=2, NotChecked=108, Total=3192 [2023-02-17 08:30:25,364 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 1519 mSDsluCounter, 3366 mSDsCounter, 0 mSdLazyCounter, 2144 mSolverCounterSat, 75 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 3719 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2144 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:25,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1520 Valid, 3719 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2144 Invalid, 2 Unknown, 0 Unchecked, 1.7s Time] [2023-02-17 08:30:25,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37744 states. [2023-02-17 08:30:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37744 to 29341. [2023-02-17 08:30:25,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29341 states, 27986 states have (on average 1.2860001429286072) internal successors, (35990), 28323 states have internal predecessors, (35990), 1269 states have call successors, (1269), 61 states have call predecessors, (1269), 61 states have return successors, (1269), 956 states have call predecessors, (1269), 1269 states have call successors, (1269) [2023-02-17 08:30:25,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29341 states to 29341 states and 38528 transitions. [2023-02-17 08:30:25,704 INFO L78 Accepts]: Start accepts. Automaton has 29341 states and 38528 transitions. Word has length 87 [2023-02-17 08:30:25,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:25,704 INFO L495 AbstractCegarLoop]: Abstraction has 29341 states and 38528 transitions. [2023-02-17 08:30:25,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.526315789473685) internal successors, (162), 19 states have internal predecessors, (162), 3 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-17 08:30:25,704 INFO L276 IsEmpty]: Start isEmpty. Operand 29341 states and 38528 transitions. [2023-02-17 08:30:25,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-17 08:30:25,706 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:25,706 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:30:25,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 08:30:25,917 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,SelfDestructingSolverStorable77 [2023-02-17 08:30:25,917 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:30:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:25,917 INFO L85 PathProgramCache]: Analyzing trace with hash 439443375, now seen corresponding path program 1 times [2023-02-17 08:30:25,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:25,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034880944] [2023-02-17 08:30:25,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:25,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:25,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:26,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:30:26,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:26,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:30:26,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:26,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-02-17 08:30:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:26,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 08:30:26,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:26,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034880944] [2023-02-17 08:30:26,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034880944] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:30:26,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136532636] [2023-02-17 08:30:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:26,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:26,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:30:26,063 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) [2023-02-17 08:30:26,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 08:30:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:26,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 08:30:26,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:30:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 08:30:26,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:30:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 08:30:26,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136532636] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:30:26,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:30:26,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-02-17 08:30:26,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356462858] [2023-02-17 08:30:26,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:30:26,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 08:30:26,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:30:26,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 08:30:26,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2023-02-17 08:30:26,417 INFO L87 Difference]: Start difference. First operand 29341 states and 38528 transitions. Second operand has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 08:30:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:26,671 INFO L93 Difference]: Finished difference Result 36239 states and 47784 transitions. [2023-02-17 08:30:26,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 08:30:26,671 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 89 [2023-02-17 08:30:26,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:26,709 INFO L225 Difference]: With dead ends: 36239 [2023-02-17 08:30:26,709 INFO L226 Difference]: Without dead ends: 36239 [2023-02-17 08:30:26,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2023-02-17 08:30:26,709 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 276 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:26,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 1349 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 08:30:26,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36239 states. [2023-02-17 08:30:26,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36239 to 29801. [2023-02-17 08:30:26,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29801 states, 28446 states have (on average 1.2813752372917107) internal successors, (36450), 28783 states have internal predecessors, (36450), 1269 states have call successors, (1269), 61 states have call predecessors, (1269), 61 states have return successors, (1269), 956 states have call predecessors, (1269), 1269 states have call successors, (1269) [2023-02-17 08:30:27,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29801 states to 29801 states and 38988 transitions. [2023-02-17 08:30:27,011 INFO L78 Accepts]: Start accepts. Automaton has 29801 states and 38988 transitions. Word has length 89 [2023-02-17 08:30:27,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:27,011 INFO L495 AbstractCegarLoop]: Abstraction has 29801 states and 38988 transitions. [2023-02-17 08:30:27,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.909090909090909) internal successors, (87), 11 states have internal predecessors, (87), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-17 08:30:27,011 INFO L276 IsEmpty]: Start isEmpty. Operand 29801 states and 38988 transitions. [2023-02-17 08:30:27,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-17 08:30:27,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:27,013 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2023-02-17 08:30:27,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 08:30:27,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:27,217 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:30:27,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1446290869, now seen corresponding path program 1 times [2023-02-17 08:30:27,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:27,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469705783] [2023-02-17 08:30:27,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:27,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:28,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:30:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:28,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-17 08:30:28,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-17 08:30:28,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:28,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469705783] [2023-02-17 08:30:28,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469705783] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:30:28,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864532919] [2023-02-17 08:30:28,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:28,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:28,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:30:28,175 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) [2023-02-17 08:30:28,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 08:30:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:28,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-17 08:30:28,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:30:28,560 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 [2023-02-17 08:30:28,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:28,587 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 28 treesize of output 27 [2023-02-17 08:30:28,674 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 24 treesize of output 8 [2023-02-17 08:30:28,714 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 36 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 08:30:28,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:30:28,881 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 126 treesize of output 118 [2023-02-17 08:30:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 35 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 08:30:29,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864532919] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 08:30:29,035 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 08:30:29,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 39 [2023-02-17 08:30:29,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090050106] [2023-02-17 08:30:29,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 08:30:29,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-17 08:30:29,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 08:30:29,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-17 08:30:29,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1332, Unknown=0, NotChecked=0, Total=1482 [2023-02-17 08:30:29,037 INFO L87 Difference]: Start difference. First operand 29801 states and 38988 transitions. Second operand has 39 states, 39 states have (on average 4.717948717948718) internal successors, (184), 35 states have internal predecessors, (184), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 08:30:30,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 08:30:30,685 INFO L93 Difference]: Finished difference Result 39842 states and 52510 transitions. [2023-02-17 08:30:30,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-17 08:30:30,690 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.717948717948718) internal successors, (184), 35 states have internal predecessors, (184), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 90 [2023-02-17 08:30:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 08:30:30,739 INFO L225 Difference]: With dead ends: 39842 [2023-02-17 08:30:30,740 INFO L226 Difference]: Without dead ends: 39842 [2023-02-17 08:30:30,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 166 SyntacticMatches, 8 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=796, Invalid=3896, Unknown=0, NotChecked=0, Total=4692 [2023-02-17 08:30:30,740 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 5677 mSDsluCounter, 2453 mSDsCounter, 0 mSdLazyCounter, 1221 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5678 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 1419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 08:30:30,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5678 Valid, 2622 Invalid, 1419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1221 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 08:30:30,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39842 states. [2023-02-17 08:30:31,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39842 to 29781. [2023-02-17 08:30:31,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29781 states, 28426 states have (on average 1.2790403152043903) internal successors, (36358), 28763 states have internal predecessors, (36358), 1269 states have call successors, (1269), 61 states have call predecessors, (1269), 61 states have return successors, (1269), 956 states have call predecessors, (1269), 1269 states have call successors, (1269) [2023-02-17 08:30:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29781 states to 29781 states and 38896 transitions. [2023-02-17 08:30:31,115 INFO L78 Accepts]: Start accepts. Automaton has 29781 states and 38896 transitions. Word has length 90 [2023-02-17 08:30:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 08:30:31,115 INFO L495 AbstractCegarLoop]: Abstraction has 29781 states and 38896 transitions. [2023-02-17 08:30:31,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.717948717948718) internal successors, (184), 35 states have internal predecessors, (184), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 08:30:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 29781 states and 38896 transitions. [2023-02-17 08:30:31,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-17 08:30:31,118 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 08:30:31,118 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 08:30:31,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 08:30:31,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:31,324 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-17 08:30:31,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 08:30:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash -479156689, now seen corresponding path program 2 times [2023-02-17 08:30:31,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 08:30:31,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971366266] [2023-02-17 08:30:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 08:30:31,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 08:30:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:31,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-17 08:30:31,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:31,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-17 08:30:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:31,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-17 08:30:31,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 08:30:31,523 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 08:30:31,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 08:30:31,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971366266] [2023-02-17 08:30:31,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971366266] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 08:30:31,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671674771] [2023-02-17 08:30:31,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 08:30:31,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 08:30:31,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 08:30:31,524 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) [2023-02-17 08:30:31,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 08:30:31,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 08:30:31,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 08:30:31,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 574 conjuncts, 85 conjunts are in the unsatisfiable core [2023-02-17 08:30:31,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 08:30:31,810 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 [2023-02-17 08:30:31,815 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 17 treesize of output 13 [2023-02-17 08:30:31,841 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 [2023-02-17 08:30:31,847 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 25 treesize of output 24 [2023-02-17 08:30:31,869 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 [2023-02-17 08:30:31,873 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 [2023-02-17 08:30:31,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:31,909 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 [2023-02-17 08:30:31,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:31,916 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 [2023-02-17 08:30:31,937 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 25 treesize of output 24 [2023-02-17 08:30:31,940 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 46 treesize of output 29 [2023-02-17 08:30:31,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:31,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:31,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2023-02-17 08:30:31,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:31,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:31,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2023-02-17 08:30:32,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:32,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:32,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:30:32,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 94 [2023-02-17 08:30:32,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:32,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 08:30:32,069 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 08:30:32,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 83 [2023-02-17 08:30:32,439 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 08:30:32,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 08:30:59,015 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 08:30:59,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 12398756 treesize of output 12349220 [2023-02-17 08:30:59,326 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 46322238 treesize of output 46125630