./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 26d01a9c 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-?-26d01a9 [2023-02-18 05:38:26,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 05:38:26,224 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 05:38:26,241 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 05:38:26,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 05:38:26,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 05:38:26,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 05:38:26,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 05:38:26,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 05:38:26,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 05:38:26,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 05:38:26,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 05:38:26,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 05:38:26,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 05:38:26,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 05:38:26,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 05:38:26,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 05:38:26,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 05:38:26,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 05:38:26,254 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 05:38:26,255 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 05:38:26,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 05:38:26,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 05:38:26,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 05:38:26,259 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 05:38:26,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 05:38:26,260 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 05:38:26,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 05:38:26,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 05:38:26,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 05:38:26,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 05:38:26,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 05:38:26,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 05:38:26,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 05:38:26,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 05:38:26,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 05:38:26,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 05:38:26,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 05:38:26,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 05:38:26,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 05:38:26,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 05:38:26,267 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-02-18 05:38:26,280 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 05:38:26,280 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 05:38:26,280 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 05:38:26,280 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 05:38:26,281 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 05:38:26,281 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 05:38:26,282 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 05:38:26,282 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 05:38:26,282 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 05:38:26,282 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 05:38:26,282 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 05:38:26,282 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2023-02-18 05:38:26,283 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 05:38:26,283 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 05:38:26,283 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 05:38:26,283 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-02-18 05:38:26,283 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2023-02-18 05:38:26,283 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-02-18 05:38:26,284 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 05:38:26,284 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-02-18 05:38:26,284 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 05:38:26,284 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 05:38:26,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 05:38:26,285 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 05:38:26,285 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 05:38:26,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 05:38:26,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 05:38:26,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 05:38:26,286 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 05:38:26,286 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 05:38:26,286 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 05:38:26,286 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 05:38:26,286 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 05:38:26,286 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 05:38:26,286 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2023-02-18 05:38:26,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 05:38:26,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 05:38:26,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 05:38:26,444 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 05:38:26,444 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 05:38:26,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext-properties/test-0217_1.i [2023-02-18 05:38:27,417 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 05:38:27,662 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 05:38:27,664 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2023-02-18 05:38:27,673 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8e6dea2c/1f6d809fdd3e4c87bffd5395f4993b01/FLAGb179486fb [2023-02-18 05:38:27,682 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8e6dea2c/1f6d809fdd3e4c87bffd5395f4993b01 [2023-02-18 05:38:27,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 05:38:27,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 05:38:27,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 05:38:27,686 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 05:38:27,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 05:38:27,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:38:27" (1/1) ... [2023-02-18 05:38:27,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76a4a68a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:27, skipping insertion in model container [2023-02-18 05:38:27,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 05:38:27" (1/1) ... [2023-02-18 05:38:27,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 05:38:27,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 05:38:27,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 05:38:27,973 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 05:38:28,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 05:38:28,052 INFO L208 MainTranslator]: Completed translation [2023-02-18 05:38:28,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28 WrapperNode [2023-02-18 05:38:28,053 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 05:38:28,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 05:38:28,055 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 05:38:28,055 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 05:38:28,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28" (1/1) ... [2023-02-18 05:38:28,089 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28" (1/1) ... [2023-02-18 05:38:28,110 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 249 [2023-02-18 05:38:28,111 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 05:38:28,111 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 05:38:28,111 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 05:38:28,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 05:38:28,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28" (1/1) ... [2023-02-18 05:38:28,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28" (1/1) ... [2023-02-18 05:38:28,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28" (1/1) ... [2023-02-18 05:38:28,125 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28" (1/1) ... [2023-02-18 05:38:28,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28" (1/1) ... [2023-02-18 05:38:28,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28" (1/1) ... [2023-02-18 05:38:28,147 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28" (1/1) ... [2023-02-18 05:38:28,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28" (1/1) ... [2023-02-18 05:38:28,150 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 05:38:28,151 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 05:38:28,151 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 05:38:28,151 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 05:38:28,152 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28" (1/1) ... [2023-02-18 05:38:28,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 05:38:28,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:28,177 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) [2023-02-18 05:38:28,179 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 [2023-02-18 05:38:28,203 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2023-02-18 05:38:28,203 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2023-02-18 05:38:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 05:38:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 05:38:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 05:38:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-02-18 05:38:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-02-18 05:38:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 05:38:28,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-02-18 05:38:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 05:38:28,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 05:38:28,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 05:38:28,301 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 05:38:28,302 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 05:38:28,696 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 05:38:28,706 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 05:38:28,707 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2023-02-18 05:38:28,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:38:28 BoogieIcfgContainer [2023-02-18 05:38:28,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 05:38:28,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 05:38:28,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 05:38:28,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 05:38:28,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 05:38:27" (1/3) ... [2023-02-18 05:38:28,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ff34e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:38:28, skipping insertion in model container [2023-02-18 05:38:28,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 05:38:28" (2/3) ... [2023-02-18 05:38:28,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19ff34e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 05:38:28, skipping insertion in model container [2023-02-18 05:38:28,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 05:38:28" (3/3) ... [2023-02-18 05:38:28,715 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2023-02-18 05:38:28,726 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 05:38:28,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2023-02-18 05:38:28,770 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 05:38:28,774 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;@6b8e3bbc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 05:38:28,775 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2023-02-18 05:38:28,779 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) [2023-02-18 05:38:28,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-18 05:38:28,784 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:28,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-18 05:38:28,784 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)] === [2023-02-18 05:38:28,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:28,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1045674122, now seen corresponding path program 1 times [2023-02-18 05:38:28,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:28,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484140662] [2023-02-18 05:38:28,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:28,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:28,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:28,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484140662] [2023-02-18 05:38:28,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484140662] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:28,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:28,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:38:28,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8997063] [2023-02-18 05:38:28,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:28,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 05:38:28,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:28,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 05:38:28,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 05:38:28,965 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) [2023-02-18 05:38:28,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:28,995 INFO L93 Difference]: Finished difference Result 170 states and 192 transitions. [2023-02-18 05:38:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 05:38:28,997 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 [2023-02-18 05:38:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:29,002 INFO L225 Difference]: With dead ends: 170 [2023-02-18 05:38:29,002 INFO L226 Difference]: Without dead ends: 168 [2023-02-18 05:38:29,003 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 [2023-02-18 05:38:29,005 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 [2023-02-18 05:38:29,006 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] [2023-02-18 05:38:29,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-18 05:38:29,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-02-18 05:38:29,045 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) [2023-02-18 05:38:29,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 190 transitions. [2023-02-18 05:38:29,050 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 190 transitions. Word has length 6 [2023-02-18 05:38:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:29,050 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 190 transitions. [2023-02-18 05:38:29,050 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) [2023-02-18 05:38:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 190 transitions. [2023-02-18 05:38:29,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 05:38:29,051 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:29,051 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:29,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 05:38:29,051 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)] === [2023-02-18 05:38:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:29,052 INFO L85 PathProgramCache]: Analyzing trace with hash 594374512, now seen corresponding path program 1 times [2023-02-18 05:38:29,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:29,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070422437] [2023-02-18 05:38:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:29,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:29,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:29,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070422437] [2023-02-18 05:38:29,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070422437] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:29,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:29,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:38:29,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094531642] [2023-02-18 05:38:29,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:29,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:29,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:29,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:29,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:29,149 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) [2023-02-18 05:38:29,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:29,181 INFO L93 Difference]: Finished difference Result 331 states and 375 transitions. [2023-02-18 05:38:29,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:29,182 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 [2023-02-18 05:38:29,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:29,183 INFO L225 Difference]: With dead ends: 331 [2023-02-18 05:38:29,183 INFO L226 Difference]: Without dead ends: 331 [2023-02-18 05:38:29,183 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 [2023-02-18 05:38:29,184 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 [2023-02-18 05:38:29,185 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] [2023-02-18 05:38:29,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2023-02-18 05:38:29,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 170. [2023-02-18 05:38:29,193 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) [2023-02-18 05:38:29,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2023-02-18 05:38:29,194 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 8 [2023-02-18 05:38:29,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:29,194 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2023-02-18 05:38:29,194 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) [2023-02-18 05:38:29,195 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2023-02-18 05:38:29,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 05:38:29,195 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:29,195 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:29,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 05:38:29,195 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)] === [2023-02-18 05:38:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:29,196 INFO L85 PathProgramCache]: Analyzing trace with hash 592527470, now seen corresponding path program 1 times [2023-02-18 05:38:29,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:29,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322065003] [2023-02-18 05:38:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:29,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:29,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:29,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322065003] [2023-02-18 05:38:29,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322065003] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:29,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:29,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-02-18 05:38:29,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938008541] [2023-02-18 05:38:29,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:29,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:38:29,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:29,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:38:29,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:38:29,269 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) [2023-02-18 05:38:29,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:29,422 INFO L93 Difference]: Finished difference Result 329 states and 372 transitions. [2023-02-18 05:38:29,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:38:29,422 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 [2023-02-18 05:38:29,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:29,425 INFO L225 Difference]: With dead ends: 329 [2023-02-18 05:38:29,425 INFO L226 Difference]: Without dead ends: 329 [2023-02-18 05:38:29,426 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 [2023-02-18 05:38:29,430 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 170 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:29,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 249 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-18 05:38:29,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 237. [2023-02-18 05:38:29,453 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) [2023-02-18 05:38:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 314 transitions. [2023-02-18 05:38:29,456 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 314 transitions. Word has length 8 [2023-02-18 05:38:29,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:29,456 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 314 transitions. [2023-02-18 05:38:29,457 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) [2023-02-18 05:38:29,457 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 314 transitions. [2023-02-18 05:38:29,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 05:38:29,457 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:29,457 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:29,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-18 05:38:29,458 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)] === [2023-02-18 05:38:29,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:29,460 INFO L85 PathProgramCache]: Analyzing trace with hash 592527471, now seen corresponding path program 1 times [2023-02-18 05:38:29,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:29,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418789399] [2023-02-18 05:38:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:29,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:29,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:29,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:29,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:29,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418789399] [2023-02-18 05:38:29,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418789399] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:29,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:29,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:38:29,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270488420] [2023-02-18 05:38:29,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:29,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:29,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:29,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:29,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:29,585 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) [2023-02-18 05:38:29,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:29,727 INFO L93 Difference]: Finished difference Result 384 states and 490 transitions. [2023-02-18 05:38:29,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:29,727 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 [2023-02-18 05:38:29,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:29,729 INFO L225 Difference]: With dead ends: 384 [2023-02-18 05:38:29,729 INFO L226 Difference]: Without dead ends: 384 [2023-02-18 05:38:29,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:38:29,730 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 141 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:29,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 412 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-02-18 05:38:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 318. [2023-02-18 05:38:29,736 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) [2023-02-18 05:38:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2023-02-18 05:38:29,737 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 8 [2023-02-18 05:38:29,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:29,738 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2023-02-18 05:38:29,738 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) [2023-02-18 05:38:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2023-02-18 05:38:29,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-18 05:38:29,738 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:29,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:29,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 05:38:29,739 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)] === [2023-02-18 05:38:29,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:29,739 INFO L85 PathProgramCache]: Analyzing trace with hash 592527533, now seen corresponding path program 1 times [2023-02-18 05:38:29,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:29,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604166254] [2023-02-18 05:38:29,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:29,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:29,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:29,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604166254] [2023-02-18 05:38:29,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604166254] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:29,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:29,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:38:29,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446931669] [2023-02-18 05:38:29,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:29,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:29,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:29,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:29,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:29,788 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) [2023-02-18 05:38:29,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:29,921 INFO L93 Difference]: Finished difference Result 383 states and 488 transitions. [2023-02-18 05:38:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:29,921 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 [2023-02-18 05:38:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:29,923 INFO L225 Difference]: With dead ends: 383 [2023-02-18 05:38:29,923 INFO L226 Difference]: Without dead ends: 383 [2023-02-18 05:38:29,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:38:29,925 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 123 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:29,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 429 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2023-02-18 05:38:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 318. [2023-02-18 05:38:29,935 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) [2023-02-18 05:38:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2023-02-18 05:38:29,937 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 8 [2023-02-18 05:38:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:29,937 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2023-02-18 05:38:29,937 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) [2023-02-18 05:38:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2023-02-18 05:38:29,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 05:38:29,941 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:29,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:29,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-18 05:38:29,942 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)] === [2023-02-18 05:38:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:29,943 INFO L85 PathProgramCache]: Analyzing trace with hash -329469321, now seen corresponding path program 1 times [2023-02-18 05:38:29,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:29,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733865001] [2023-02-18 05:38:29,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:29,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:29,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:29,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:29,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733865001] [2023-02-18 05:38:29,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733865001] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:29,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:29,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:38:29,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843969478] [2023-02-18 05:38:29,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:29,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:38:29,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:29,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:38:29,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:38:29,969 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) [2023-02-18 05:38:29,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:29,980 INFO L93 Difference]: Finished difference Result 459 states and 609 transitions. [2023-02-18 05:38:29,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:38:29,981 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 [2023-02-18 05:38:29,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:29,982 INFO L225 Difference]: With dead ends: 459 [2023-02-18 05:38:29,982 INFO L226 Difference]: Without dead ends: 459 [2023-02-18 05:38:29,982 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 [2023-02-18 05:38:29,983 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 [2023-02-18 05:38:29,987 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] [2023-02-18 05:38:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-02-18 05:38:29,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 320. [2023-02-18 05:38:29,992 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) [2023-02-18 05:38:29,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 453 transitions. [2023-02-18 05:38:29,993 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 453 transitions. Word has length 11 [2023-02-18 05:38:29,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:29,994 INFO L495 AbstractCegarLoop]: Abstraction has 320 states and 453 transitions. [2023-02-18 05:38:29,994 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) [2023-02-18 05:38:29,994 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 453 transitions. [2023-02-18 05:38:29,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-18 05:38:29,995 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:29,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:29,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-18 05:38:29,995 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)] === [2023-02-18 05:38:29,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:29,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1623615594, now seen corresponding path program 1 times [2023-02-18 05:38:29,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:29,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277263164] [2023-02-18 05:38:29,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:29,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:30,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:30,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277263164] [2023-02-18 05:38:30,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277263164] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:30,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:30,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:38:30,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932235973] [2023-02-18 05:38:30,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:30,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:38:30,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:30,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:38:30,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:38:30,023 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) [2023-02-18 05:38:30,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:30,089 INFO L93 Difference]: Finished difference Result 371 states and 500 transitions. [2023-02-18 05:38:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:38:30,090 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 [2023-02-18 05:38:30,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:30,092 INFO L225 Difference]: With dead ends: 371 [2023-02-18 05:38:30,092 INFO L226 Difference]: Without dead ends: 364 [2023-02-18 05:38:30,093 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 [2023-02-18 05:38:30,093 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 71 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2023-02-18 05:38:30,094 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] [2023-02-18 05:38:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2023-02-18 05:38:30,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 317. [2023-02-18 05:38:30,100 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) [2023-02-18 05:38:30,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 448 transitions. [2023-02-18 05:38:30,101 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 448 transitions. Word has length 12 [2023-02-18 05:38:30,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:30,101 INFO L495 AbstractCegarLoop]: Abstraction has 317 states and 448 transitions. [2023-02-18 05:38:30,101 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) [2023-02-18 05:38:30,101 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 448 transitions. [2023-02-18 05:38:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 05:38:30,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:30,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:30,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-18 05:38:30,103 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)] === [2023-02-18 05:38:30,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:30,103 INFO L85 PathProgramCache]: Analyzing trace with hash -321333405, now seen corresponding path program 1 times [2023-02-18 05:38:30,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:30,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949191365] [2023-02-18 05:38:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:30,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:30,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:30,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:30,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949191365] [2023-02-18 05:38:30,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949191365] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:30,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:30,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:38:30,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067831055] [2023-02-18 05:38:30,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:30,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:30,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:30,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:30,147 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) [2023-02-18 05:38:30,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:30,161 INFO L93 Difference]: Finished difference Result 515 states and 714 transitions. [2023-02-18 05:38:30,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:30,162 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 [2023-02-18 05:38:30,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:30,165 INFO L225 Difference]: With dead ends: 515 [2023-02-18 05:38:30,165 INFO L226 Difference]: Without dead ends: 515 [2023-02-18 05:38:30,166 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 [2023-02-18 05:38:30,166 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 [2023-02-18 05:38:30,167 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] [2023-02-18 05:38:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2023-02-18 05:38:30,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 321. [2023-02-18 05:38:30,172 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) [2023-02-18 05:38:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 450 transitions. [2023-02-18 05:38:30,174 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 450 transitions. Word has length 17 [2023-02-18 05:38:30,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:30,174 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 450 transitions. [2023-02-18 05:38:30,174 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) [2023-02-18 05:38:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 450 transitions. [2023-02-18 05:38:30,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 05:38:30,175 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:30,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:30,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-18 05:38:30,176 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)] === [2023-02-18 05:38:30,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:30,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1022397983, now seen corresponding path program 1 times [2023-02-18 05:38:30,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:30,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611222045] [2023-02-18 05:38:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:30,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:30,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:30,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:30,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611222045] [2023-02-18 05:38:30,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611222045] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:30,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:30,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:38:30,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044900813] [2023-02-18 05:38:30,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:30,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:38:30,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:30,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:38:30,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:38:30,204 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) [2023-02-18 05:38:30,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:30,216 INFO L93 Difference]: Finished difference Result 325 states and 454 transitions. [2023-02-18 05:38:30,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:38:30,216 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 [2023-02-18 05:38:30,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:30,217 INFO L225 Difference]: With dead ends: 325 [2023-02-18 05:38:30,218 INFO L226 Difference]: Without dead ends: 325 [2023-02-18 05:38:30,218 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 [2023-02-18 05:38:30,218 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 [2023-02-18 05:38:30,218 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] [2023-02-18 05:38:30,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2023-02-18 05:38:30,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2023-02-18 05:38:30,222 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) [2023-02-18 05:38:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 454 transitions. [2023-02-18 05:38:30,223 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 454 transitions. Word has length 17 [2023-02-18 05:38:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:30,223 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 454 transitions. [2023-02-18 05:38:30,223 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) [2023-02-18 05:38:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 454 transitions. [2023-02-18 05:38:30,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 05:38:30,224 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:30,224 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:30,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-18 05:38:30,224 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)] === [2023-02-18 05:38:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:30,224 INFO L85 PathProgramCache]: Analyzing trace with hash -213051357, now seen corresponding path program 1 times [2023-02-18 05:38:30,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:30,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453663560] [2023-02-18 05:38:30,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:30,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:30,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:30,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:30,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:30,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453663560] [2023-02-18 05:38:30,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453663560] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:30,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:30,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:38:30,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451859786] [2023-02-18 05:38:30,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:30,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:30,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:30,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:30,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:30,299 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) [2023-02-18 05:38:30,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:30,472 INFO L93 Difference]: Finished difference Result 550 states and 690 transitions. [2023-02-18 05:38:30,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:30,473 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 [2023-02-18 05:38:30,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:30,474 INFO L225 Difference]: With dead ends: 550 [2023-02-18 05:38:30,475 INFO L226 Difference]: Without dead ends: 550 [2023-02-18 05:38:30,475 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 [2023-02-18 05:38:30,475 INFO L413 NwaCegarLoop]: 204 mSDtfsCounter, 328 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-02-18 05:38:30,476 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] [2023-02-18 05:38:30,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2023-02-18 05:38:30,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 331. [2023-02-18 05:38:30,480 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) [2023-02-18 05:38:30,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 460 transitions. [2023-02-18 05:38:30,481 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 460 transitions. Word has length 17 [2023-02-18 05:38:30,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:30,482 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 460 transitions. [2023-02-18 05:38:30,482 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) [2023-02-18 05:38:30,482 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 460 transitions. [2023-02-18 05:38:30,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 05:38:30,482 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:30,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:30,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-18 05:38:30,483 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)] === [2023-02-18 05:38:30,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:30,483 INFO L85 PathProgramCache]: Analyzing trace with hash -213051356, now seen corresponding path program 1 times [2023-02-18 05:38:30,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:30,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837651699] [2023-02-18 05:38:30,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:30,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:30,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:30,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:30,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837651699] [2023-02-18 05:38:30,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837651699] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:30,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:30,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:38:30,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365867] [2023-02-18 05:38:30,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:30,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:30,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:30,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:30,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:30,535 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) [2023-02-18 05:38:30,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:30,664 INFO L93 Difference]: Finished difference Result 378 states and 479 transitions. [2023-02-18 05:38:30,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:30,665 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 [2023-02-18 05:38:30,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:30,666 INFO L225 Difference]: With dead ends: 378 [2023-02-18 05:38:30,666 INFO L226 Difference]: Without dead ends: 378 [2023-02-18 05:38:30,666 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 [2023-02-18 05:38:30,667 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:30,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 431 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:30,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2023-02-18 05:38:30,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 331. [2023-02-18 05:38:30,671 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) [2023-02-18 05:38:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 454 transitions. [2023-02-18 05:38:30,672 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 454 transitions. Word has length 17 [2023-02-18 05:38:30,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:30,672 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 454 transitions. [2023-02-18 05:38:30,672 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) [2023-02-18 05:38:30,672 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 454 transitions. [2023-02-18 05:38:30,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 05:38:30,673 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:30,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:30,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-18 05:38:30,673 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)] === [2023-02-18 05:38:30,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:30,673 INFO L85 PathProgramCache]: Analyzing trace with hash 490210144, now seen corresponding path program 1 times [2023-02-18 05:38:30,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:30,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236334430] [2023-02-18 05:38:30,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:30,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:30,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:30,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:30,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236334430] [2023-02-18 05:38:30,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236334430] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:30,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:30,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:38:30,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630792039] [2023-02-18 05:38:30,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:30,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 05:38:30,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 05:38:30,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:38:30,735 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) [2023-02-18 05:38:30,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:30,983 INFO L93 Difference]: Finished difference Result 680 states and 803 transitions. [2023-02-18 05:38:30,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:30,984 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 [2023-02-18 05:38:30,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:30,987 INFO L225 Difference]: With dead ends: 680 [2023-02-18 05:38:30,987 INFO L226 Difference]: Without dead ends: 680 [2023-02-18 05:38:30,987 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 [2023-02-18 05:38:30,988 INFO L413 NwaCegarLoop]: 207 mSDtfsCounter, 805 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:30,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 562 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:30,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2023-02-18 05:38:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 328. [2023-02-18 05:38:30,995 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) [2023-02-18 05:38:30,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 448 transitions. [2023-02-18 05:38:30,996 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 448 transitions. Word has length 18 [2023-02-18 05:38:30,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:30,997 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 448 transitions. [2023-02-18 05:38:30,997 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) [2023-02-18 05:38:30,997 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 448 transitions. [2023-02-18 05:38:30,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 05:38:30,997 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:30,998 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:30,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-18 05:38:30,998 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)] === [2023-02-18 05:38:30,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:30,998 INFO L85 PathProgramCache]: Analyzing trace with hash 490210145, now seen corresponding path program 1 times [2023-02-18 05:38:30,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:30,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821267262] [2023-02-18 05:38:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:30,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:31,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:31,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:31,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:31,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:31,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821267262] [2023-02-18 05:38:31,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821267262] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:31,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:31,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:38:31,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965775041] [2023-02-18 05:38:31,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:31,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:31,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:31,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:31,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:31,094 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), 4 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) [2023-02-18 05:38:31,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:31,527 INFO L93 Difference]: Finished difference Result 662 states and 804 transitions. [2023-02-18 05:38:31,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 05:38:31,527 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 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 [2023-02-18 05:38:31,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:31,529 INFO L225 Difference]: With dead ends: 662 [2023-02-18 05:38:31,529 INFO L226 Difference]: Without dead ends: 662 [2023-02-18 05:38:31,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-02-18 05:38:31,530 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 622 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 626 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:31,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [626 Valid, 660 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 05:38:31,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2023-02-18 05:38:31,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 348. [2023-02-18 05:38:31,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 273 states have (on average 1.7106227106227105) internal successors, (467), 337 states have internal predecessors, (467), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 05:38:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 483 transitions. [2023-02-18 05:38:31,536 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 483 transitions. Word has length 18 [2023-02-18 05:38:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:31,536 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 483 transitions. [2023-02-18 05:38:31,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2023-02-18 05:38:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 483 transitions. [2023-02-18 05:38:31,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 05:38:31,536 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:31,536 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] [2023-02-18 05:38:31,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-18 05:38:31,537 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:31,537 INFO L85 PathProgramCache]: Analyzing trace with hash -254199642, now seen corresponding path program 1 times [2023-02-18 05:38:31,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:31,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147227120] [2023-02-18 05:38:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:31,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:31,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:31,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:31,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147227120] [2023-02-18 05:38:31,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147227120] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:31,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:31,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-18 05:38:31,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035649858] [2023-02-18 05:38:31,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:31,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 05:38:31,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:31,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 05:38:31,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-02-18 05:38:31,697 INFO L87 Difference]: Start difference. First operand 348 states and 483 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:31,886 INFO L93 Difference]: Finished difference Result 532 states and 706 transitions. [2023-02-18 05:38:31,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 05:38:31,887 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 [2023-02-18 05:38:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:31,888 INFO L225 Difference]: With dead ends: 532 [2023-02-18 05:38:31,888 INFO L226 Difference]: Without dead ends: 532 [2023-02-18 05:38:31,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2023-02-18 05:38:31,889 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 198 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 901 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:31,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 901 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-02-18 05:38:31,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 407. [2023-02-18 05:38:31,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 329 states have (on average 1.674772036474164) internal successors, (551), 392 states have internal predecessors, (551), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 05:38:31,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 571 transitions. [2023-02-18 05:38:31,895 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 571 transitions. Word has length 22 [2023-02-18 05:38:31,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:31,895 INFO L495 AbstractCegarLoop]: Abstraction has 407 states and 571 transitions. [2023-02-18 05:38:31,895 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) [2023-02-18 05:38:31,895 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 571 transitions. [2023-02-18 05:38:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 05:38:31,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:31,895 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] [2023-02-18 05:38:31,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-02-18 05:38:31,896 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:31,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1832886663, now seen corresponding path program 1 times [2023-02-18 05:38:31,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:31,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643468609] [2023-02-18 05:38:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:31,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:31,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:32,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:32,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:32,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:32,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643468609] [2023-02-18 05:38:32,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643468609] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:32,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:32,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 05:38:32,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878935072] [2023-02-18 05:38:32,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:32,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 05:38:32,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:32,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 05:38:32,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-02-18 05:38:32,101 INFO L87 Difference]: Start difference. First operand 407 states and 571 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:32,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:32,532 INFO L93 Difference]: Finished difference Result 754 states and 1029 transitions. [2023-02-18 05:38:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 05:38:32,532 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-02-18 05:38:32,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:32,534 INFO L225 Difference]: With dead ends: 754 [2023-02-18 05:38:32,534 INFO L226 Difference]: Without dead ends: 752 [2023-02-18 05:38:32,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-02-18 05:38:32,535 INFO L413 NwaCegarLoop]: 252 mSDtfsCounter, 531 mSDsluCounter, 1258 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1510 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:32,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1510 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 05:38:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2023-02-18 05:38:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 401. [2023-02-18 05:38:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 323 states have (on average 1.671826625386997) internal successors, (540), 386 states have internal predecessors, (540), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 05:38:32,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 560 transitions. [2023-02-18 05:38:32,541 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 560 transitions. Word has length 23 [2023-02-18 05:38:32,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:32,541 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 560 transitions. [2023-02-18 05:38:32,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 9 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 560 transitions. [2023-02-18 05:38:32,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 05:38:32,542 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:32,542 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] [2023-02-18 05:38:32,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-18 05:38:32,542 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)] === [2023-02-18 05:38:32,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:32,542 INFO L85 PathProgramCache]: Analyzing trace with hash 499344936, now seen corresponding path program 1 times [2023-02-18 05:38:32,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:32,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272884120] [2023-02-18 05:38:32,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:32,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:32,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:32,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:32,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:32,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272884120] [2023-02-18 05:38:32,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272884120] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:32,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:32,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 05:38:32,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656731366] [2023-02-18 05:38:32,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:32,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:32,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:32,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:32,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:32,622 INFO L87 Difference]: Start difference. First operand 401 states and 560 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:32,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:32,680 INFO L93 Difference]: Finished difference Result 434 states and 563 transitions. [2023-02-18 05:38:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 05:38:32,680 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 [2023-02-18 05:38:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:32,682 INFO L225 Difference]: With dead ends: 434 [2023-02-18 05:38:32,682 INFO L226 Difference]: Without dead ends: 434 [2023-02-18 05:38:32,682 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 [2023-02-18 05:38:32,683 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 246 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:32,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 964 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:32,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-02-18 05:38:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 401. [2023-02-18 05:38:32,688 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) [2023-02-18 05:38:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 558 transitions. [2023-02-18 05:38:32,690 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 558 transitions. Word has length 23 [2023-02-18 05:38:32,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:32,691 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 558 transitions. [2023-02-18 05:38:32,691 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) [2023-02-18 05:38:32,691 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 558 transitions. [2023-02-18 05:38:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-18 05:38:32,695 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:32,695 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] [2023-02-18 05:38:32,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-18 05:38:32,695 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:32,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:32,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2020614998, now seen corresponding path program 1 times [2023-02-18 05:38:32,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:32,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010595796] [2023-02-18 05:38:32,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:32,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:32,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:32,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:32,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010595796] [2023-02-18 05:38:32,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010595796] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:32,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:32,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 05:38:32,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987400441] [2023-02-18 05:38:32,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:32,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:32,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:32,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:32,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:32,769 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) [2023-02-18 05:38:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:32,816 INFO L93 Difference]: Finished difference Result 430 states and 555 transitions. [2023-02-18 05:38:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 05:38:32,817 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 [2023-02-18 05:38:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:32,818 INFO L225 Difference]: With dead ends: 430 [2023-02-18 05:38:32,818 INFO L226 Difference]: Without dead ends: 430 [2023-02-18 05:38:32,818 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 [2023-02-18 05:38:32,819 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:32,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 999 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:32,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2023-02-18 05:38:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 399. [2023-02-18 05:38:32,823 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) [2023-02-18 05:38:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 552 transitions. [2023-02-18 05:38:32,826 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 552 transitions. Word has length 23 [2023-02-18 05:38:32,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:32,826 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 552 transitions. [2023-02-18 05:38:32,827 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) [2023-02-18 05:38:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 552 transitions. [2023-02-18 05:38:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 05:38:32,827 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:32,827 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] [2023-02-18 05:38:32,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-02-18 05:38:32,828 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:32,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:32,828 INFO L85 PathProgramCache]: Analyzing trace with hash 535975453, now seen corresponding path program 1 times [2023-02-18 05:38:32,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:32,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971835441] [2023-02-18 05:38:32,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:32,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:32,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:32,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:32,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:32,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971835441] [2023-02-18 05:38:32,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971835441] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:32,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:32,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 05:38:32,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117330997] [2023-02-18 05:38:32,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:32,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:38:32,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:32,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:38:32,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:38:32,856 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) [2023-02-18 05:38:32,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:32,922 INFO L93 Difference]: Finished difference Result 487 states and 646 transitions. [2023-02-18 05:38:32,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:38:32,923 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 [2023-02-18 05:38:32,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:32,925 INFO L225 Difference]: With dead ends: 487 [2023-02-18 05:38:32,925 INFO L226 Difference]: Without dead ends: 487 [2023-02-18 05:38:32,925 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 [2023-02-18 05:38:32,926 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 [2023-02-18 05:38:32,926 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] [2023-02-18 05:38:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487 states. [2023-02-18 05:38:32,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487 to 396. [2023-02-18 05:38:32,931 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) [2023-02-18 05:38:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 543 transitions. [2023-02-18 05:38:32,932 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 543 transitions. Word has length 24 [2023-02-18 05:38:32,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:32,933 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 543 transitions. [2023-02-18 05:38:32,933 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) [2023-02-18 05:38:32,933 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 543 transitions. [2023-02-18 05:38:32,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 05:38:32,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:32,933 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] [2023-02-18 05:38:32,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-02-18 05:38:32,933 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:32,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:32,934 INFO L85 PathProgramCache]: Analyzing trace with hash 535975454, now seen corresponding path program 1 times [2023-02-18 05:38:32,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:32,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323929792] [2023-02-18 05:38:32,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:32,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:32,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:32,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:32,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323929792] [2023-02-18 05:38:32,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323929792] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:32,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:32,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:38:32,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630423097] [2023-02-18 05:38:32,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:32,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:32,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:32,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:32,981 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) [2023-02-18 05:38:33,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:33,096 INFO L93 Difference]: Finished difference Result 425 states and 540 transitions. [2023-02-18 05:38:33,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:33,097 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 [2023-02-18 05:38:33,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:33,098 INFO L225 Difference]: With dead ends: 425 [2023-02-18 05:38:33,098 INFO L226 Difference]: Without dead ends: 425 [2023-02-18 05:38:33,098 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 [2023-02-18 05:38:33,098 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 159 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:33,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 351 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-02-18 05:38:33,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 394. [2023-02-18 05:38:33,103 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) [2023-02-18 05:38:33,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 537 transitions. [2023-02-18 05:38:33,104 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 537 transitions. Word has length 24 [2023-02-18 05:38:33,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:33,104 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 537 transitions. [2023-02-18 05:38:33,104 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) [2023-02-18 05:38:33,105 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 537 transitions. [2023-02-18 05:38:33,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 05:38:33,105 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:33,105 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] [2023-02-18 05:38:33,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-18 05:38:33,105 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:33,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:33,105 INFO L85 PathProgramCache]: Analyzing trace with hash 475133714, now seen corresponding path program 1 times [2023-02-18 05:38:33,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:33,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068814052] [2023-02-18 05:38:33,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:33,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:33,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:33,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:33,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:33,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068814052] [2023-02-18 05:38:33,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068814052] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:33,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:33,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:38:33,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534906485] [2023-02-18 05:38:33,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:33,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:33,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:33,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:33,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:33,158 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) [2023-02-18 05:38:33,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:33,313 INFO L93 Difference]: Finished difference Result 619 states and 786 transitions. [2023-02-18 05:38:33,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:33,315 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 [2023-02-18 05:38:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:33,316 INFO L225 Difference]: With dead ends: 619 [2023-02-18 05:38:33,316 INFO L226 Difference]: Without dead ends: 619 [2023-02-18 05:38:33,316 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 [2023-02-18 05:38:33,317 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:33,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 428 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:33,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2023-02-18 05:38:33,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 414. [2023-02-18 05:38:33,322 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) [2023-02-18 05:38:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 577 transitions. [2023-02-18 05:38:33,323 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 577 transitions. Word has length 25 [2023-02-18 05:38:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:33,324 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 577 transitions. [2023-02-18 05:38:33,324 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) [2023-02-18 05:38:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 577 transitions. [2023-02-18 05:38:33,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 05:38:33,324 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:33,324 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] [2023-02-18 05:38:33,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-18 05:38:33,324 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:33,325 INFO L85 PathProgramCache]: Analyzing trace with hash 475133715, now seen corresponding path program 1 times [2023-02-18 05:38:33,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:33,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122154538] [2023-02-18 05:38:33,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:33,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:33,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:33,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:33,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:33,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122154538] [2023-02-18 05:38:33,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122154538] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:33,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:33,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:38:33,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189391878] [2023-02-18 05:38:33,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:33,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:33,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:33,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:33,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:33,395 INFO L87 Difference]: Start difference. First operand 414 states and 577 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:33,628 INFO L93 Difference]: Finished difference Result 457 states and 592 transitions. [2023-02-18 05:38:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:33,629 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-02-18 05:38:33,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:33,630 INFO L225 Difference]: With dead ends: 457 [2023-02-18 05:38:33,630 INFO L226 Difference]: Without dead ends: 457 [2023-02-18 05:38:33,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-02-18 05:38:33,630 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 238 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:33,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 597 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:33,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2023-02-18 05:38:33,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 414. [2023-02-18 05:38:33,635 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) [2023-02-18 05:38:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 568 transitions. [2023-02-18 05:38:33,636 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 568 transitions. Word has length 25 [2023-02-18 05:38:33,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:33,636 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 568 transitions. [2023-02-18 05:38:33,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:33,636 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 568 transitions. [2023-02-18 05:38:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 05:38:33,636 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:33,636 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] [2023-02-18 05:38:33,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-18 05:38:33,637 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:33,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:33,637 INFO L85 PathProgramCache]: Analyzing trace with hash -323662464, now seen corresponding path program 1 times [2023-02-18 05:38:33,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:33,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136796884] [2023-02-18 05:38:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:33,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:33,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:33,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:33,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:33,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136796884] [2023-02-18 05:38:33,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136796884] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:33,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:33,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:38:33,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771240697] [2023-02-18 05:38:33,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:33,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:33,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:33,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:33,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:33,679 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) [2023-02-18 05:38:33,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:33,760 INFO L93 Difference]: Finished difference Result 441 states and 568 transitions. [2023-02-18 05:38:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:33,761 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 [2023-02-18 05:38:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:33,762 INFO L225 Difference]: With dead ends: 441 [2023-02-18 05:38:33,762 INFO L226 Difference]: Without dead ends: 441 [2023-02-18 05:38:33,762 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 [2023-02-18 05:38:33,763 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 [2023-02-18 05:38:33,763 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] [2023-02-18 05:38:33,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-02-18 05:38:33,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 413. [2023-02-18 05:38:33,767 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) [2023-02-18 05:38:33,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 565 transitions. [2023-02-18 05:38:33,768 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 565 transitions. Word has length 26 [2023-02-18 05:38:33,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:33,768 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 565 transitions. [2023-02-18 05:38:33,768 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) [2023-02-18 05:38:33,768 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 565 transitions. [2023-02-18 05:38:33,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-18 05:38:33,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:33,768 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] [2023-02-18 05:38:33,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-18 05:38:33,769 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:33,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:33,769 INFO L85 PathProgramCache]: Analyzing trace with hash -323662657, now seen corresponding path program 1 times [2023-02-18 05:38:33,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:33,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178085675] [2023-02-18 05:38:33,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:33,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:33,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:33,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:33,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:33,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178085675] [2023-02-18 05:38:33,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178085675] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:33,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:33,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 05:38:33,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039122445] [2023-02-18 05:38:33,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:33,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:38:33,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:33,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:38:33,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:33,821 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) [2023-02-18 05:38:33,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:33,960 INFO L93 Difference]: Finished difference Result 625 states and 836 transitions. [2023-02-18 05:38:33,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 05:38:33,961 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 [2023-02-18 05:38:33,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:33,963 INFO L225 Difference]: With dead ends: 625 [2023-02-18 05:38:33,963 INFO L226 Difference]: Without dead ends: 625 [2023-02-18 05:38:33,963 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 [2023-02-18 05:38:33,963 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 [2023-02-18 05:38:33,963 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] [2023-02-18 05:38:33,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-02-18 05:38:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 443. [2023-02-18 05:38:33,968 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) [2023-02-18 05:38:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 600 transitions. [2023-02-18 05:38:33,969 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 600 transitions. Word has length 26 [2023-02-18 05:38:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:33,969 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 600 transitions. [2023-02-18 05:38:33,969 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) [2023-02-18 05:38:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 600 transitions. [2023-02-18 05:38:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-18 05:38:33,970 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:33,970 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] [2023-02-18 05:38:33,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-18 05:38:33,970 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:33,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:33,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1503548246, now seen corresponding path program 1 times [2023-02-18 05:38:33,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:33,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024197413] [2023-02-18 05:38:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:33,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:34,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:34,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:34,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:34,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024197413] [2023-02-18 05:38:34,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024197413] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:34,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:34,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 05:38:34,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161727443] [2023-02-18 05:38:34,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:34,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:38:34,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:34,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:38:34,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:34,082 INFO L87 Difference]: Start difference. First operand 443 states and 600 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:34,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:34,307 INFO L93 Difference]: Finished difference Result 782 states and 1012 transitions. [2023-02-18 05:38:34,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 05:38:34,308 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2023-02-18 05:38:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:34,310 INFO L225 Difference]: With dead ends: 782 [2023-02-18 05:38:34,310 INFO L226 Difference]: Without dead ends: 782 [2023-02-18 05:38:34,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-18 05:38:34,310 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 507 mSDsluCounter, 1068 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:34,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [509 Valid, 1380 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:34,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2023-02-18 05:38:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 440. [2023-02-18 05:38:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 371 states have (on average 1.536388140161725) internal successors, (570), 425 states have internal predecessors, (570), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 05:38:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 590 transitions. [2023-02-18 05:38:34,317 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 590 transitions. Word has length 28 [2023-02-18 05:38:34,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:34,317 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 590 transitions. [2023-02-18 05:38:34,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 590 transitions. [2023-02-18 05:38:34,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 05:38:34,317 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:34,317 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] [2023-02-18 05:38:34,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-02-18 05:38:34,317 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:34,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:34,318 INFO L85 PathProgramCache]: Analyzing trace with hash 634621977, now seen corresponding path program 1 times [2023-02-18 05:38:34,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:34,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531698928] [2023-02-18 05:38:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:34,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:34,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:34,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:34,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:34,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531698928] [2023-02-18 05:38:34,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531698928] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:34,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:34,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:38:34,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290750101] [2023-02-18 05:38:34,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:34,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 05:38:34,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:34,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 05:38:34,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:38:34,376 INFO L87 Difference]: Start difference. First operand 440 states and 590 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:34,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:34,483 INFO L93 Difference]: Finished difference Result 505 states and 649 transitions. [2023-02-18 05:38:34,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:34,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2023-02-18 05:38:34,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:34,485 INFO L225 Difference]: With dead ends: 505 [2023-02-18 05:38:34,485 INFO L226 Difference]: Without dead ends: 505 [2023-02-18 05:38:34,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:34,485 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 154 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:34,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 615 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:34,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-02-18 05:38:34,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 440. [2023-02-18 05:38:34,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 371 states have (on average 1.5336927223719676) internal successors, (569), 425 states have internal predecessors, (569), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-18 05:38:34,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 589 transitions. [2023-02-18 05:38:34,491 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 589 transitions. Word has length 29 [2023-02-18 05:38:34,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:34,491 INFO L495 AbstractCegarLoop]: Abstraction has 440 states and 589 transitions. [2023-02-18 05:38:34,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 589 transitions. [2023-02-18 05:38:34,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-18 05:38:34,492 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:34,492 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] [2023-02-18 05:38:34,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-02-18 05:38:34,492 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:34,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:34,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1800846934, now seen corresponding path program 1 times [2023-02-18 05:38:34,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:34,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840387129] [2023-02-18 05:38:34,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:34,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:34,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-18 05:38:34,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:34,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:34,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840387129] [2023-02-18 05:38:34,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840387129] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:34,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:34,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 05:38:34,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352550500] [2023-02-18 05:38:34,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:34,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 05:38:34,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:34,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 05:38:34,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-02-18 05:38:34,687 INFO L87 Difference]: Start difference. First operand 440 states and 589 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2023-02-18 05:38:35,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:35,004 INFO L93 Difference]: Finished difference Result 637 states and 784 transitions. [2023-02-18 05:38:35,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 05:38:35,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 [2023-02-18 05:38:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:35,007 INFO L225 Difference]: With dead ends: 637 [2023-02-18 05:38:35,007 INFO L226 Difference]: Without dead ends: 637 [2023-02-18 05:38:35,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-02-18 05:38:35,008 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 709 mSDsluCounter, 1918 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:35,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [711 Valid, 2263 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 05:38:35,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2023-02-18 05:38:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 328. [2023-02-18 05:38:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 265 states have (on average 1.5320754716981133) internal successors, (406), 318 states have internal predecessors, (406), 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) [2023-02-18 05:38:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 418 transitions. [2023-02-18 05:38:35,013 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 418 transitions. Word has length 30 [2023-02-18 05:38:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:35,013 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 418 transitions. [2023-02-18 05:38:35,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2023-02-18 05:38:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 418 transitions. [2023-02-18 05:38:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 05:38:35,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:35,013 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] [2023-02-18 05:38:35,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-02-18 05:38:35,013 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:35,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:35,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2076048724, now seen corresponding path program 1 times [2023-02-18 05:38:35,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:35,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648103876] [2023-02-18 05:38:35,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:35,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:35,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:35,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:35,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:35,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648103876] [2023-02-18 05:38:35,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648103876] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:35,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:35,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:38:35,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190547226] [2023-02-18 05:38:35,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:35,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:35,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:35,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:35,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:35,084 INFO L87 Difference]: Start difference. First operand 328 states and 418 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) [2023-02-18 05:38:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:35,199 INFO L93 Difference]: Finished difference Result 415 states and 516 transitions. [2023-02-18 05:38:35,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:35,200 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 [2023-02-18 05:38:35,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:35,201 INFO L225 Difference]: With dead ends: 415 [2023-02-18 05:38:35,201 INFO L226 Difference]: Without dead ends: 415 [2023-02-18 05:38:35,201 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 [2023-02-18 05:38:35,201 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 477 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 522 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 [2023-02-18 05:38:35,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 522 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:35,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-02-18 05:38:35,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 327. [2023-02-18 05:38:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 265 states have (on average 1.5245283018867926) internal successors, (404), 317 states have internal predecessors, (404), 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) [2023-02-18 05:38:35,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 416 transitions. [2023-02-18 05:38:35,206 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 416 transitions. Word has length 34 [2023-02-18 05:38:35,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:35,206 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 416 transitions. [2023-02-18 05:38:35,206 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) [2023-02-18 05:38:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 416 transitions. [2023-02-18 05:38:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 05:38:35,206 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:35,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:35,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-02-18 05:38:35,207 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:35,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:35,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2076048723, now seen corresponding path program 1 times [2023-02-18 05:38:35,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:35,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048169405] [2023-02-18 05:38:35,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:35,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:35,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:35,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:35,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:35,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:35,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048169405] [2023-02-18 05:38:35,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048169405] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:35,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:35,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:38:35,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100861921] [2023-02-18 05:38:35,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:35,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:35,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:35,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:35,300 INFO L87 Difference]: Start difference. First operand 327 states and 416 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) [2023-02-18 05:38:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:35,392 INFO L93 Difference]: Finished difference Result 326 states and 414 transitions. [2023-02-18 05:38:35,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:35,393 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 [2023-02-18 05:38:35,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:35,394 INFO L225 Difference]: With dead ends: 326 [2023-02-18 05:38:35,394 INFO L226 Difference]: Without dead ends: 326 [2023-02-18 05:38:35,394 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 [2023-02-18 05:38:35,394 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 507 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:35,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 330 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:35,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2023-02-18 05:38:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2023-02-18 05:38:35,397 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) [2023-02-18 05:38:35,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 414 transitions. [2023-02-18 05:38:35,398 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 414 transitions. Word has length 34 [2023-02-18 05:38:35,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:35,399 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 414 transitions. [2023-02-18 05:38:35,399 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) [2023-02-18 05:38:35,399 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 414 transitions. [2023-02-18 05:38:35,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 05:38:35,399 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:35,399 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] [2023-02-18 05:38:35,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-02-18 05:38:35,400 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:35,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:35,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972557, now seen corresponding path program 1 times [2023-02-18 05:38:35,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:35,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906224152] [2023-02-18 05:38:35,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:35,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:35,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:35,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:35,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:35,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906224152] [2023-02-18 05:38:35,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906224152] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:35,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:35,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:38:35,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917296336] [2023-02-18 05:38:35,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:35,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 05:38:35,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:35,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 05:38:35,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:38:35,444 INFO L87 Difference]: Start difference. First operand 326 states and 414 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) [2023-02-18 05:38:35,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:35,597 INFO L93 Difference]: Finished difference Result 704 states and 864 transitions. [2023-02-18 05:38:35,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 05:38:35,598 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 [2023-02-18 05:38:35,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:35,599 INFO L225 Difference]: With dead ends: 704 [2023-02-18 05:38:35,599 INFO L226 Difference]: Without dead ends: 704 [2023-02-18 05:38:35,599 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 [2023-02-18 05:38:35,600 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 557 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:35,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 484 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:35,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2023-02-18 05:38:35,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 323. [2023-02-18 05:38:35,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 265 states have (on average 1.4943396226415093) internal successors, (396), 313 states have internal predecessors, (396), 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) [2023-02-18 05:38:35,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 408 transitions. [2023-02-18 05:38:35,605 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 408 transitions. Word has length 36 [2023-02-18 05:38:35,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:35,605 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 408 transitions. [2023-02-18 05:38:35,605 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) [2023-02-18 05:38:35,605 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 408 transitions. [2023-02-18 05:38:35,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 05:38:35,605 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:35,605 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:35,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-02-18 05:38:35,605 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:35,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:35,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972558, now seen corresponding path program 1 times [2023-02-18 05:38:35,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:35,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102319609] [2023-02-18 05:38:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:35,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:35,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:35,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:35,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102319609] [2023-02-18 05:38:35,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102319609] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:35,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:35,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:38:35,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424065375] [2023-02-18 05:38:35,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:35,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:35,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:35,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:35,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:35,686 INFO L87 Difference]: Start difference. First operand 323 states and 408 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) [2023-02-18 05:38:35,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:35,859 INFO L93 Difference]: Finished difference Result 526 states and 660 transitions. [2023-02-18 05:38:35,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:35,859 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 [2023-02-18 05:38:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:35,861 INFO L225 Difference]: With dead ends: 526 [2023-02-18 05:38:35,861 INFO L226 Difference]: Without dead ends: 526 [2023-02-18 05:38:35,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-18 05:38:35,861 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 733 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:35,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 451 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:35,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-02-18 05:38:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 322. [2023-02-18 05:38:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 265 states have (on average 1.4867924528301886) internal successors, (394), 312 states have internal predecessors, (394), 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) [2023-02-18 05:38:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 406 transitions. [2023-02-18 05:38:35,866 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 406 transitions. Word has length 36 [2023-02-18 05:38:35,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:35,866 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 406 transitions. [2023-02-18 05:38:35,866 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) [2023-02-18 05:38:35,866 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 406 transitions. [2023-02-18 05:38:35,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-18 05:38:35,867 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:35,867 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] [2023-02-18 05:38:35,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-02-18 05:38:35,867 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:35,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:35,867 INFO L85 PathProgramCache]: Analyzing trace with hash 2076972719, now seen corresponding path program 1 times [2023-02-18 05:38:35,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:35,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296964175] [2023-02-18 05:38:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:35,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:35,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:35,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:35,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:35,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296964175] [2023-02-18 05:38:35,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296964175] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:35,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:35,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:38:35,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977213162] [2023-02-18 05:38:35,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:35,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 05:38:35,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:35,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 05:38:35,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:38:35,979 INFO L87 Difference]: Start difference. First operand 322 states and 406 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) [2023-02-18 05:38:36,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:36,153 INFO L93 Difference]: Finished difference Result 466 states and 538 transitions. [2023-02-18 05:38:36,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 05:38:36,153 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 [2023-02-18 05:38:36,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:36,154 INFO L225 Difference]: With dead ends: 466 [2023-02-18 05:38:36,154 INFO L226 Difference]: Without dead ends: 466 [2023-02-18 05:38:36,155 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 [2023-02-18 05:38:36,155 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 363 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:36,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [365 Valid, 436 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:36,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2023-02-18 05:38:36,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 322. [2023-02-18 05:38:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 265 states have (on average 1.4792452830188678) internal successors, (392), 312 states have internal predecessors, (392), 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) [2023-02-18 05:38:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 404 transitions. [2023-02-18 05:38:36,159 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 404 transitions. Word has length 36 [2023-02-18 05:38:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:36,159 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 404 transitions. [2023-02-18 05:38:36,159 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) [2023-02-18 05:38:36,159 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 404 transitions. [2023-02-18 05:38:36,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 05:38:36,160 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:36,160 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] [2023-02-18 05:38:36,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-02-18 05:38:36,160 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:36,160 INFO L85 PathProgramCache]: Analyzing trace with hash -274270044, now seen corresponding path program 1 times [2023-02-18 05:38:36,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:36,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867299376] [2023-02-18 05:38:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:36,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:36,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:36,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:36,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-18 05:38:36,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:36,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:36,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:36,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867299376] [2023-02-18 05:38:36,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867299376] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:36,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88303745] [2023-02-18 05:38:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:36,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:36,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:36,220 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) [2023-02-18 05:38:36,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 05:38:36,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:36,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 05:38:36,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:36,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:36,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:38:36,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:36,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88303745] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:38:36,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:38:36,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-18 05:38:36,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805545054] [2023-02-18 05:38:36,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:38:36,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 05:38:36,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:36,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 05:38:36,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-18 05:38:36,420 INFO L87 Difference]: Start difference. First operand 322 states and 404 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) [2023-02-18 05:38:36,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:36,470 INFO L93 Difference]: Finished difference Result 1290 states and 1652 transitions. [2023-02-18 05:38:36,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 05:38:36,471 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 [2023-02-18 05:38:36,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:36,474 INFO L225 Difference]: With dead ends: 1290 [2023-02-18 05:38:36,474 INFO L226 Difference]: Without dead ends: 1290 [2023-02-18 05:38:36,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-02-18 05:38:36,475 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 766 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:36,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1032 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:36,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2023-02-18 05:38:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 721. [2023-02-18 05:38:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 721 states, 658 states have (on average 1.452887537993921) internal successors, (956), 705 states have internal predecessors, (956), 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) [2023-02-18 05:38:36,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721 states to 721 states and 980 transitions. [2023-02-18 05:38:36,489 INFO L78 Accepts]: Start accepts. Automaton has 721 states and 980 transitions. Word has length 50 [2023-02-18 05:38:36,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:36,489 INFO L495 AbstractCegarLoop]: Abstraction has 721 states and 980 transitions. [2023-02-18 05:38:36,489 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) [2023-02-18 05:38:36,489 INFO L276 IsEmpty]: Start isEmpty. Operand 721 states and 980 transitions. [2023-02-18 05:38:36,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-18 05:38:36,489 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:36,490 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] [2023-02-18 05:38:36,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-18 05:38:36,695 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,SelfDestructingSolverStorable31 [2023-02-18 05:38:36,695 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)] === [2023-02-18 05:38:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:36,696 INFO L85 PathProgramCache]: Analyzing trace with hash -975334622, now seen corresponding path program 1 times [2023-02-18 05:38:36,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:36,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964568631] [2023-02-18 05:38:36,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:36,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:36,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:36,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-18 05:38:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:36,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:36,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:36,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964568631] [2023-02-18 05:38:36,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964568631] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:36,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:36,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:38:36,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232778285] [2023-02-18 05:38:36,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:36,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:36,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:36,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:36,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:36,845 INFO L87 Difference]: Start difference. First operand 721 states and 980 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) [2023-02-18 05:38:36,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:37,000 INFO L93 Difference]: Finished difference Result 786 states and 1063 transitions. [2023-02-18 05:38:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 05:38:37,000 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 [2023-02-18 05:38:37,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:37,004 INFO L225 Difference]: With dead ends: 786 [2023-02-18 05:38:37,004 INFO L226 Difference]: Without dead ends: 786 [2023-02-18 05:38:37,004 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 [2023-02-18 05:38:37,004 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 356 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:37,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 340 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:37,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2023-02-18 05:38:37,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 718. [2023-02-18 05:38:37,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 658 states have (on average 1.4407294832826747) internal successors, (948), 702 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) [2023-02-18 05:38:37,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 972 transitions. [2023-02-18 05:38:37,015 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 972 transitions. Word has length 50 [2023-02-18 05:38:37,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:37,015 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 972 transitions. [2023-02-18 05:38:37,015 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) [2023-02-18 05:38:37,016 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 972 transitions. [2023-02-18 05:38:37,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 05:38:37,016 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:37,016 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] [2023-02-18 05:38:37,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2023-02-18 05:38:37,017 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:37,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:37,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1212801990, now seen corresponding path program 1 times [2023-02-18 05:38:37,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:37,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479584858] [2023-02-18 05:38:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:37,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:37,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:37,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:37,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:37,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479584858] [2023-02-18 05:38:37,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479584858] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:37,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:37,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:38:37,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624131818] [2023-02-18 05:38:37,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:37,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:37,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:37,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:37,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:37,064 INFO L87 Difference]: Start difference. First operand 718 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) [2023-02-18 05:38:37,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:37,080 INFO L93 Difference]: Finished difference Result 823 states and 1098 transitions. [2023-02-18 05:38:37,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:37,080 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 [2023-02-18 05:38:37,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:37,082 INFO L225 Difference]: With dead ends: 823 [2023-02-18 05:38:37,082 INFO L226 Difference]: Without dead ends: 823 [2023-02-18 05:38:37,083 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 [2023-02-18 05:38:37,083 INFO L413 NwaCegarLoop]: 166 mSDtfsCounter, 119 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 400 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 [2023-02-18 05:38:37,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 400 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2023-02-18 05:38:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 724. [2023-02-18 05:38:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 664 states have (on average 1.4367469879518073) internal successors, (954), 708 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) [2023-02-18 05:38:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 978 transitions. [2023-02-18 05:38:37,101 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 978 transitions. Word has length 51 [2023-02-18 05:38:37,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:37,101 INFO L495 AbstractCegarLoop]: Abstraction has 724 states and 978 transitions. [2023-02-18 05:38:37,101 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) [2023-02-18 05:38:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 978 transitions. [2023-02-18 05:38:37,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 05:38:37,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:37,102 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] [2023-02-18 05:38:37,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-02-18 05:38:37,102 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)] === [2023-02-18 05:38:37,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:37,103 INFO L85 PathProgramCache]: Analyzing trace with hash 532743620, now seen corresponding path program 1 times [2023-02-18 05:38:37,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:37,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413462971] [2023-02-18 05:38:37,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:37,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:37,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:37,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:37,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:37,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413462971] [2023-02-18 05:38:37,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413462971] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:37,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804239496] [2023-02-18 05:38:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:37,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:37,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:37,184 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) [2023-02-18 05:38:37,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 05:38:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:37,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 05:38:37,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:37,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:38:37,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:37,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804239496] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:38:37,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:38:37,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-02-18 05:38:37,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790781013] [2023-02-18 05:38:37,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:38:37,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 05:38:37,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 05:38:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:37,321 INFO L87 Difference]: Start difference. First operand 724 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) [2023-02-18 05:38:37,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:37,352 INFO L93 Difference]: Finished difference Result 2554 states and 3437 transitions. [2023-02-18 05:38:37,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 05:38:37,353 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 [2023-02-18 05:38:37,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:37,358 INFO L225 Difference]: With dead ends: 2554 [2023-02-18 05:38:37,358 INFO L226 Difference]: Without dead ends: 2554 [2023-02-18 05:38:37,358 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 [2023-02-18 05:38:37,359 INFO L413 NwaCegarLoop]: 223 mSDtfsCounter, 370 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1257 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:37,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1257 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:37,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2554 states. [2023-02-18 05:38:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2554 to 1753. [2023-02-18 05:38:37,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1753 states, 1674 states have (on average 1.4277180406212664) internal successors, (2390), 1718 states have internal predecessors, (2390), 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) [2023-02-18 05:38:37,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2452 transitions. [2023-02-18 05:38:37,381 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2452 transitions. Word has length 51 [2023-02-18 05:38:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:37,381 INFO L495 AbstractCegarLoop]: Abstraction has 1753 states and 2452 transitions. [2023-02-18 05:38:37,381 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) [2023-02-18 05:38:37,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2452 transitions. [2023-02-18 05:38:37,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 05:38:37,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:37,382 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] [2023-02-18 05:38:37,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:37,587 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,SelfDestructingSolverStorable34 [2023-02-18 05:38:37,588 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)] === [2023-02-18 05:38:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:37,588 INFO L85 PathProgramCache]: Analyzing trace with hash 530896578, now seen corresponding path program 1 times [2023-02-18 05:38:37,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:37,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131053328] [2023-02-18 05:38:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:37,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:37,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:37,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:37,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131053328] [2023-02-18 05:38:37,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131053328] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:37,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:37,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-02-18 05:38:37,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624107430] [2023-02-18 05:38:37,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:37,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 05:38:37,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:37,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 05:38:37,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2023-02-18 05:38:37,761 INFO L87 Difference]: Start difference. First operand 1753 states and 2452 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) [2023-02-18 05:38:37,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:37,989 INFO L93 Difference]: Finished difference Result 1771 states and 2470 transitions. [2023-02-18 05:38:37,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 05:38:37,989 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 [2023-02-18 05:38:37,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:37,993 INFO L225 Difference]: With dead ends: 1771 [2023-02-18 05:38:37,993 INFO L226 Difference]: Without dead ends: 1771 [2023-02-18 05:38:37,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-02-18 05:38:37,994 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 496 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:37,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 596 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2023-02-18 05:38:38,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1755. [2023-02-18 05:38:38,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1755 states, 1676 states have (on average 1.4278042959427208) internal successors, (2393), 1720 states have internal predecessors, (2393), 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) [2023-02-18 05:38:38,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1755 states to 1755 states and 2455 transitions. [2023-02-18 05:38:38,011 INFO L78 Accepts]: Start accepts. Automaton has 1755 states and 2455 transitions. Word has length 51 [2023-02-18 05:38:38,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:38,012 INFO L495 AbstractCegarLoop]: Abstraction has 1755 states and 2455 transitions. [2023-02-18 05:38:38,012 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) [2023-02-18 05:38:38,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1755 states and 2455 transitions. [2023-02-18 05:38:38,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 05:38:38,012 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:38,013 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] [2023-02-18 05:38:38,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2023-02-18 05:38:38,013 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)] === [2023-02-18 05:38:38,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:38,013 INFO L85 PathProgramCache]: Analyzing trace with hash 530896640, now seen corresponding path program 1 times [2023-02-18 05:38:38,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:38,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471513070] [2023-02-18 05:38:38,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:38,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:38,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:38,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:38,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471513070] [2023-02-18 05:38:38,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471513070] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:38,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:38,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:38:38,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492124022] [2023-02-18 05:38:38,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:38,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:38,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:38,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:38,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:38,132 INFO L87 Difference]: Start difference. First operand 1755 states and 2455 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) [2023-02-18 05:38:38,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:38,277 INFO L93 Difference]: Finished difference Result 1770 states and 2468 transitions. [2023-02-18 05:38:38,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:38,278 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 [2023-02-18 05:38:38,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:38,282 INFO L225 Difference]: With dead ends: 1770 [2023-02-18 05:38:38,282 INFO L226 Difference]: Without dead ends: 1770 [2023-02-18 05:38:38,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-18 05:38:38,283 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 368 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:38,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 335 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:38,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1770 states. [2023-02-18 05:38:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1770 to 1752. [2023-02-18 05:38:38,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1674 states have (on average 1.4265232974910393) internal successors, (2388), 1717 states have internal predecessors, (2388), 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) [2023-02-18 05:38:38,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 2450 transitions. [2023-02-18 05:38:38,302 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 2450 transitions. Word has length 51 [2023-02-18 05:38:38,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:38,302 INFO L495 AbstractCegarLoop]: Abstraction has 1752 states and 2450 transitions. [2023-02-18 05:38:38,302 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) [2023-02-18 05:38:38,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 2450 transitions. [2023-02-18 05:38:38,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-18 05:38:38,303 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:38,303 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] [2023-02-18 05:38:38,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-02-18 05:38:38,303 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:38,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1870600004, now seen corresponding path program 1 times [2023-02-18 05:38:38,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:38,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422474953] [2023-02-18 05:38:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:38,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:38,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:38,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:38,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:38,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422474953] [2023-02-18 05:38:38,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422474953] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:38,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:38,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 05:38:38,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719789972] [2023-02-18 05:38:38,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:38,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 05:38:38,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:38,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 05:38:38,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-18 05:38:38,750 INFO L87 Difference]: Start difference. First operand 1752 states and 2450 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) [2023-02-18 05:38:39,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:39,245 INFO L93 Difference]: Finished difference Result 1797 states and 2496 transitions. [2023-02-18 05:38:39,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 05:38:39,246 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 [2023-02-18 05:38:39,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:39,255 INFO L225 Difference]: With dead ends: 1797 [2023-02-18 05:38:39,255 INFO L226 Difference]: Without dead ends: 1797 [2023-02-18 05:38:39,256 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 [2023-02-18 05:38:39,256 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 77 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:39,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 1051 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 05:38:39,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2023-02-18 05:38:39,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1786. [2023-02-18 05:38:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1786 states, 1708 states have (on average 1.4186182669789227) internal successors, (2423), 1751 states have internal predecessors, (2423), 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) [2023-02-18 05:38:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1786 states to 1786 states and 2485 transitions. [2023-02-18 05:38:39,277 INFO L78 Accepts]: Start accepts. Automaton has 1786 states and 2485 transitions. Word has length 54 [2023-02-18 05:38:39,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:39,278 INFO L495 AbstractCegarLoop]: Abstraction has 1786 states and 2485 transitions. [2023-02-18 05:38:39,278 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) [2023-02-18 05:38:39,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1786 states and 2485 transitions. [2023-02-18 05:38:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-18 05:38:39,279 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:39,279 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] [2023-02-18 05:38:39,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2023-02-18 05:38:39,279 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)] === [2023-02-18 05:38:39,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:39,280 INFO L85 PathProgramCache]: Analyzing trace with hash 652010731, now seen corresponding path program 1 times [2023-02-18 05:38:39,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:39,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523499347] [2023-02-18 05:38:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:39,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:39,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:39,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:39,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:39,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523499347] [2023-02-18 05:38:39,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523499347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:39,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860915621] [2023-02-18 05:38:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:39,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:39,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:39,737 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) [2023-02-18 05:38:39,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 05:38:39,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:39,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-18 05:38:39,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:39,866 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:38:39,867 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 [2023-02-18 05:38:39,914 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 [2023-02-18 05:38:39,916 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 [2023-02-18 05:38:39,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:38:39,940 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 [2023-02-18 05:38:39,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:38:39,945 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 [2023-02-18 05:38:39,971 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 [2023-02-18 05:38:39,973 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 [2023-02-18 05:38:40,039 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 [2023-02-18 05:38:40,041 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 [2023-02-18 05:38:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:40,057 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:38:40,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860915621] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:40,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:38:40,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [14] total 25 [2023-02-18 05:38:40,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42503436] [2023-02-18 05:38:40,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:40,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 05:38:40,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:40,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 05:38:40,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=540, Unknown=0, NotChecked=0, Total=600 [2023-02-18 05:38:40,059 INFO L87 Difference]: Start difference. First operand 1786 states and 2485 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:40,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:40,566 INFO L93 Difference]: Finished difference Result 2422 states and 3282 transitions. [2023-02-18 05:38:40,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 05:38:40,567 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2023-02-18 05:38:40,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:40,571 INFO L225 Difference]: With dead ends: 2422 [2023-02-18 05:38:40,571 INFO L226 Difference]: Without dead ends: 2422 [2023-02-18 05:38:40,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2023-02-18 05:38:40,572 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 669 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 671 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:40,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [671 Valid, 1502 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 05:38:40,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2422 states. [2023-02-18 05:38:40,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2422 to 1841. [2023-02-18 05:38:40,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1763 states have (on average 1.4038570618264323) internal successors, (2475), 1806 states have internal predecessors, (2475), 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) [2023-02-18 05:38:40,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 2537 transitions. [2023-02-18 05:38:40,612 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 2537 transitions. Word has length 55 [2023-02-18 05:38:40,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:40,612 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 2537 transitions. [2023-02-18 05:38:40,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 2537 transitions. [2023-02-18 05:38:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 05:38:40,613 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:40,614 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] [2023-02-18 05:38:40,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-18 05:38:40,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:40,819 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:40,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:40,819 INFO L85 PathProgramCache]: Analyzing trace with hash 528923948, now seen corresponding path program 1 times [2023-02-18 05:38:40,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:40,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463521736] [2023-02-18 05:38:40,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:40,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:40,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:41,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:41,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:41,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463521736] [2023-02-18 05:38:41,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463521736] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:41,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17501513] [2023-02-18 05:38:41,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:41,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:41,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:41,259 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) [2023-02-18 05:38:41,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 05:38:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:41,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-18 05:38:41,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:41,423 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 [2023-02-18 05:38:41,506 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 [2023-02-18 05:38:41,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:38:41,527 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 [2023-02-18 05:38:41,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-02-18 05:38:41,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:41,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:38:41,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17501513] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:41,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:38:41,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 24 [2023-02-18 05:38:41,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359964840] [2023-02-18 05:38:41,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:41,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 05:38:41,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 05:38:41,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-02-18 05:38:41,608 INFO L87 Difference]: Start difference. First operand 1841 states and 2537 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:42,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:42,135 INFO L93 Difference]: Finished difference Result 2896 states and 4036 transitions. [2023-02-18 05:38:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-18 05:38:42,135 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-02-18 05:38:42,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:42,139 INFO L225 Difference]: With dead ends: 2896 [2023-02-18 05:38:42,139 INFO L226 Difference]: Without dead ends: 2896 [2023-02-18 05:38:42,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=258, Invalid=1002, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 05:38:42,140 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1083 mSDsluCounter, 978 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:42,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1083 Valid, 1119 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 05:38:42,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2896 states. [2023-02-18 05:38:42,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2896 to 2117. [2023-02-18 05:38:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2117 states, 2016 states have (on average 1.3963293650793651) internal successors, (2815), 2075 states have internal predecessors, (2815), 53 states have call successors, (53), 5 states have call predecessors, (53), 5 states have return successors, (53), 36 states have call predecessors, (53), 53 states have call successors, (53) [2023-02-18 05:38:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2117 states to 2117 states and 2921 transitions. [2023-02-18 05:38:42,165 INFO L78 Accepts]: Start accepts. Automaton has 2117 states and 2921 transitions. Word has length 56 [2023-02-18 05:38:42,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:42,165 INFO L495 AbstractCegarLoop]: Abstraction has 2117 states and 2921 transitions. [2023-02-18 05:38:42,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:42,165 INFO L276 IsEmpty]: Start isEmpty. Operand 2117 states and 2921 transitions. [2023-02-18 05:38:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 05:38:42,166 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:42,166 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:38:42,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:42,371 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,SelfDestructingSolverStorable39 [2023-02-18 05:38:42,371 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:42,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:42,372 INFO L85 PathProgramCache]: Analyzing trace with hash 528923949, now seen corresponding path program 1 times [2023-02-18 05:38:42,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:42,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252363966] [2023-02-18 05:38:42,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:42,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:42,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:42,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:42,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:42,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252363966] [2023-02-18 05:38:42,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252363966] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:42,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:42,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-18 05:38:42,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041496134] [2023-02-18 05:38:42,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:42,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 05:38:42,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:42,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 05:38:42,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-02-18 05:38:42,984 INFO L87 Difference]: Start difference. First operand 2117 states and 2921 transitions. Second operand has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:43,731 INFO L93 Difference]: Finished difference Result 2904 states and 4063 transitions. [2023-02-18 05:38:43,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 05:38:43,732 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-02-18 05:38:43,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:43,741 INFO L225 Difference]: With dead ends: 2904 [2023-02-18 05:38:43,741 INFO L226 Difference]: Without dead ends: 2904 [2023-02-18 05:38:43,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=588, Unknown=0, NotChecked=0, Total=756 [2023-02-18 05:38:43,741 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 1419 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1420 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:43,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1420 Valid, 1187 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 05:38:43,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2904 states. [2023-02-18 05:38:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2904 to 2262. [2023-02-18 05:38:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2262 states, 2155 states have (on average 1.4120649651972157) internal successors, (3043), 2216 states have internal predecessors, (3043), 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) [2023-02-18 05:38:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2262 states to 2262 states and 3159 transitions. [2023-02-18 05:38:43,765 INFO L78 Accepts]: Start accepts. Automaton has 2262 states and 3159 transitions. Word has length 56 [2023-02-18 05:38:43,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:43,765 INFO L495 AbstractCegarLoop]: Abstraction has 2262 states and 3159 transitions. [2023-02-18 05:38:43,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:43,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2262 states and 3159 transitions. [2023-02-18 05:38:43,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 05:38:43,766 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:43,766 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] [2023-02-18 05:38:43,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2023-02-18 05:38:43,767 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)] === [2023-02-18 05:38:43,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:43,767 INFO L85 PathProgramCache]: Analyzing trace with hash 530770990, now seen corresponding path program 1 times [2023-02-18 05:38:43,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:43,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921299769] [2023-02-18 05:38:43,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:43,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:43,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:43,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:43,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:43,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921299769] [2023-02-18 05:38:43,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921299769] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:43,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:43,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-02-18 05:38:43,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599330523] [2023-02-18 05:38:43,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:43,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 05:38:43,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:43,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 05:38:43,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-18 05:38:43,990 INFO L87 Difference]: Start difference. First operand 2262 states and 3159 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:44,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:44,535 INFO L93 Difference]: Finished difference Result 3551 states and 5015 transitions. [2023-02-18 05:38:44,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 05:38:44,535 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-02-18 05:38:44,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:44,540 INFO L225 Difference]: With dead ends: 3551 [2023-02-18 05:38:44,540 INFO L226 Difference]: Without dead ends: 3551 [2023-02-18 05:38:44,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2023-02-18 05:38:44,541 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1124 mSDsluCounter, 905 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1126 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:44,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1126 Valid, 1055 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 05:38:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2023-02-18 05:38:44,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2697. [2023-02-18 05:38:44,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2542 states have (on average 1.396144767899292) internal successors, (3549), 2637 states have internal predecessors, (3549), 102 states have call successors, (102), 10 states have call predecessors, (102), 10 states have return successors, (102), 49 states have call predecessors, (102), 102 states have call successors, (102) [2023-02-18 05:38:44,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 3753 transitions. [2023-02-18 05:38:44,572 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 3753 transitions. Word has length 56 [2023-02-18 05:38:44,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:44,572 INFO L495 AbstractCegarLoop]: Abstraction has 2697 states and 3753 transitions. [2023-02-18 05:38:44,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 12 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:44,573 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 3753 transitions. [2023-02-18 05:38:44,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-18 05:38:44,573 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:44,573 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] [2023-02-18 05:38:44,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2023-02-18 05:38:44,573 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)] === [2023-02-18 05:38:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:44,574 INFO L85 PathProgramCache]: Analyzing trace with hash 530770991, now seen corresponding path program 1 times [2023-02-18 05:38:44,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:44,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099962895] [2023-02-18 05:38:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:44,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:44,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:44,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:44,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099962895] [2023-02-18 05:38:44,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099962895] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:44,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221671021] [2023-02-18 05:38:44,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:44,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:44,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:44,893 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) [2023-02-18 05:38:44,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 05:38:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:45,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 05:38:45,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:45,025 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 [2023-02-18 05:38:45,107 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 [2023-02-18 05:38:45,110 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 [2023-02-18 05:38:45,197 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:38:45,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-02-18 05:38:45,200 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:38:45,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 9 [2023-02-18 05:38:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:45,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:38:45,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221671021] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:45,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:38:45,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 20 [2023-02-18 05:38:45,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137657107] [2023-02-18 05:38:45,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:45,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-18 05:38:45,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-18 05:38:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2023-02-18 05:38:45,234 INFO L87 Difference]: Start difference. First operand 2697 states and 3753 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:45,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:45,749 INFO L93 Difference]: Finished difference Result 3716 states and 5226 transitions. [2023-02-18 05:38:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-18 05:38:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2023-02-18 05:38:45,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:45,755 INFO L225 Difference]: With dead ends: 3716 [2023-02-18 05:38:45,755 INFO L226 Difference]: Without dead ends: 3716 [2023-02-18 05:38:45,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2023-02-18 05:38:45,756 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 1608 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:45,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1608 Valid, 896 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-18 05:38:45,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3716 states. [2023-02-18 05:38:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3716 to 2836. [2023-02-18 05:38:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2836 states, 2675 states have (on average 1.4089719626168224) internal successors, (3769), 2772 states have internal predecessors, (3769), 107 states have call successors, (107), 11 states have call predecessors, (107), 11 states have return successors, (107), 52 states have call predecessors, (107), 107 states have call successors, (107) [2023-02-18 05:38:45,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2836 states to 2836 states and 3983 transitions. [2023-02-18 05:38:45,781 INFO L78 Accepts]: Start accepts. Automaton has 2836 states and 3983 transitions. Word has length 56 [2023-02-18 05:38:45,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:45,781 INFO L495 AbstractCegarLoop]: Abstraction has 2836 states and 3983 transitions. [2023-02-18 05:38:45,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 11 states have internal predecessors, (54), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-18 05:38:45,781 INFO L276 IsEmpty]: Start isEmpty. Operand 2836 states and 3983 transitions. [2023-02-18 05:38:45,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 05:38:45,782 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:45,782 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] [2023-02-18 05:38:45,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:45,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:45,988 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:45,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:45,988 INFO L85 PathProgramCache]: Analyzing trace with hash -958362120, now seen corresponding path program 1 times [2023-02-18 05:38:45,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:45,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769697210] [2023-02-18 05:38:45,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:45,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:46,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:46,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 05:38:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 05:38:46,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:46,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769697210] [2023-02-18 05:38:46,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769697210] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:46,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:46,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:38:46,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813616658] [2023-02-18 05:38:46,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:46,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 05:38:46,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:46,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 05:38:46,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-18 05:38:46,055 INFO L87 Difference]: Start difference. First operand 2836 states and 3983 transitions. Second operand has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 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) [2023-02-18 05:38:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:46,088 INFO L93 Difference]: Finished difference Result 3916 states and 5424 transitions. [2023-02-18 05:38:46,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 05:38:46,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 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 57 [2023-02-18 05:38:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:46,093 INFO L225 Difference]: With dead ends: 3916 [2023-02-18 05:38:46,093 INFO L226 Difference]: Without dead ends: 3916 [2023-02-18 05:38:46,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-18 05:38:46,094 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 415 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:46,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 324 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:46,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2023-02-18 05:38:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 2835. [2023-02-18 05:38:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2835 states, 2675 states have (on average 1.4022429906542055) internal successors, (3751), 2771 states have internal predecessors, (3751), 107 states have call successors, (107), 11 states have call predecessors, (107), 11 states have return successors, (107), 52 states have call predecessors, (107), 107 states have call successors, (107) [2023-02-18 05:38:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2835 states to 2835 states and 3965 transitions. [2023-02-18 05:38:46,147 INFO L78 Accepts]: Start accepts. Automaton has 2835 states and 3965 transitions. Word has length 57 [2023-02-18 05:38:46,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:46,147 INFO L495 AbstractCegarLoop]: Abstraction has 2835 states and 3965 transitions. [2023-02-18 05:38:46,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.25) internal successors, (49), 5 states have internal predecessors, (49), 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) [2023-02-18 05:38:46,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2835 states and 3965 transitions. [2023-02-18 05:38:46,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 05:38:46,148 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:46,148 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] [2023-02-18 05:38:46,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-02-18 05:38:46,148 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:46,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:46,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1776354176, now seen corresponding path program 1 times [2023-02-18 05:38:46,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:46,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659935261] [2023-02-18 05:38:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:46,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:46,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:46,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 05:38:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 05:38:46,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:46,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659935261] [2023-02-18 05:38:46,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659935261] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:46,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254815355] [2023-02-18 05:38:46,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:46,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:46,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:46,509 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) [2023-02-18 05:38:46,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 05:38:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:46,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-18 05:38:46,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:46,668 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 [2023-02-18 05:38:46,729 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 [2023-02-18 05:38:46,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:38:46,750 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 [2023-02-18 05:38:46,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:38:46,801 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 29 treesize of output 99 [2023-02-18 05:38:46,820 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 29 treesize of output 9 [2023-02-18 05:38:46,828 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:46,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:38:46,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254815355] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:46,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 05:38:46,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 24 [2023-02-18 05:38:46,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680281777] [2023-02-18 05:38:46,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 05:38:46,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 05:38:46,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 05:38:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2023-02-18 05:38:46,900 INFO L87 Difference]: Start difference. First operand 2835 states and 3965 transitions. Second operand has 25 states, 24 states have (on average 4.375) internal successors, (105), 23 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) [2023-02-18 05:38:47,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:47,971 INFO L93 Difference]: Finished difference Result 6449 states and 9278 transitions. [2023-02-18 05:38:47,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-18 05:38:47,989 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 23 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 [2023-02-18 05:38:47,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:47,999 INFO L225 Difference]: With dead ends: 6449 [2023-02-18 05:38:47,999 INFO L226 Difference]: Without dead ends: 6449 [2023-02-18 05:38:48,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=622, Invalid=2240, Unknown=0, NotChecked=0, Total=2862 [2023-02-18 05:38:48,001 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 3077 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 1802 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3078 SdHoareTripleChecker+Valid, 2141 SdHoareTripleChecker+Invalid, 1918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:48,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3078 Valid, 2141 Invalid, 1918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1802 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-18 05:38:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6449 states. [2023-02-18 05:38:48,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6449 to 3005. [2023-02-18 05:38:48,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3005 states, 2845 states have (on average 1.3971880492091389) internal successors, (3975), 2924 states have internal predecessors, (3975), 107 states have call successors, (107), 11 states have call predecessors, (107), 11 states have return successors, (107), 69 states have call predecessors, (107), 107 states have call successors, (107) [2023-02-18 05:38:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3005 states to 3005 states and 4189 transitions. [2023-02-18 05:38:48,040 INFO L78 Accepts]: Start accepts. Automaton has 3005 states and 4189 transitions. Word has length 57 [2023-02-18 05:38:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:48,040 INFO L495 AbstractCegarLoop]: Abstraction has 3005 states and 4189 transitions. [2023-02-18 05:38:48,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 4.375) internal successors, (105), 23 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) [2023-02-18 05:38:48,041 INFO L276 IsEmpty]: Start isEmpty. Operand 3005 states and 4189 transitions. [2023-02-18 05:38:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 05:38:48,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:48,041 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] [2023-02-18 05:38:48,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 05:38:48,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:48,247 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:48,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:48,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1776354177, now seen corresponding path program 1 times [2023-02-18 05:38:48,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:48,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873419555] [2023-02-18 05:38:48,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:48,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:49,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:49,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 05:38:49,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 05:38:49,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:49,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873419555] [2023-02-18 05:38:49,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873419555] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:49,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669781673] [2023-02-18 05:38:49,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:49,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:49,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:49,146 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) [2023-02-18 05:38:49,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 05:38:49,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:49,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-18 05:38:49,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:49,294 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 [2023-02-18 05:38:49,296 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 [2023-02-18 05:38:49,402 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 [2023-02-18 05:38:49,404 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 [2023-02-18 05:38:49,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:38:49,441 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 [2023-02-18 05:38:49,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:38:49,446 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 [2023-02-18 05:38:49,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:38:49,556 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 [2023-02-18 05:38:49,559 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:38:49,559 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 [2023-02-18 05:38:49,627 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:38:49,628 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 [2023-02-18 05:38:49,630 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:38:49,630 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 [2023-02-18 05:38:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:49,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:38:49,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669781673] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:49,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 05:38:49,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13] total 31 [2023-02-18 05:38:49,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898327526] [2023-02-18 05:38:49,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 05:38:49,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-18 05:38:49,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:49,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-18 05:38:49,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 05:38:49,861 INFO L87 Difference]: Start difference. First operand 3005 states and 4189 transitions. Second operand has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 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) [2023-02-18 05:38:52,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:52,744 INFO L93 Difference]: Finished difference Result 6819 states and 9666 transitions. [2023-02-18 05:38:52,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-18 05:38:52,744 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 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 [2023-02-18 05:38:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:52,752 INFO L225 Difference]: With dead ends: 6819 [2023-02-18 05:38:52,752 INFO L226 Difference]: Without dead ends: 6819 [2023-02-18 05:38:52,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=801, Invalid=4169, Unknown=0, NotChecked=0, Total=4970 [2023-02-18 05:38:52,754 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 4281 mSDsluCounter, 2938 mSDsCounter, 0 mSdLazyCounter, 3091 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4282 SdHoareTripleChecker+Valid, 3062 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 3091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:52,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4282 Valid, 3062 Invalid, 3220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 3091 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-18 05:38:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6819 states. [2023-02-18 05:38:52,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6819 to 3218. [2023-02-18 05:38:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3218 states, 3044 states have (on average 1.3827201051248357) internal successors, (4209), 3133 states have internal predecessors, (4209), 120 states have call successors, (120), 12 states have call predecessors, (120), 12 states have return successors, (120), 72 states have call predecessors, (120), 120 states have call successors, (120) [2023-02-18 05:38:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3218 states to 3218 states and 4449 transitions. [2023-02-18 05:38:52,791 INFO L78 Accepts]: Start accepts. Automaton has 3218 states and 4449 transitions. Word has length 57 [2023-02-18 05:38:52,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:52,791 INFO L495 AbstractCegarLoop]: Abstraction has 3218 states and 4449 transitions. [2023-02-18 05:38:52,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.4193548387096775) internal successors, (106), 30 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) [2023-02-18 05:38:52,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3218 states and 4449 transitions. [2023-02-18 05:38:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-18 05:38:52,791 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:52,792 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] [2023-02-18 05:38:52,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:52,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:52,997 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:52,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:52,998 INFO L85 PathProgramCache]: Analyzing trace with hash -783228031, now seen corresponding path program 1 times [2023-02-18 05:38:52,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:52,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036781300] [2023-02-18 05:38:52,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:52,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:53,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:53,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:53,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036781300] [2023-02-18 05:38:53,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036781300] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:53,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352773787] [2023-02-18 05:38:53,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:53,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:53,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:53,066 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) [2023-02-18 05:38:53,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 05:38:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:53,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 05:38:53,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:53,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:38:53,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352773787] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:53,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:38:53,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-02-18 05:38:53,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677264809] [2023-02-18 05:38:53,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:53,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:53,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:53,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:53,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:53,201 INFO L87 Difference]: Start difference. First operand 3218 states and 4449 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) [2023-02-18 05:38:53,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:53,218 INFO L93 Difference]: Finished difference Result 4290 states and 5956 transitions. [2023-02-18 05:38:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:53,218 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 [2023-02-18 05:38:53,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:53,227 INFO L225 Difference]: With dead ends: 4290 [2023-02-18 05:38:53,227 INFO L226 Difference]: Without dead ends: 4290 [2023-02-18 05:38:53,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:53,228 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 240 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:53,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 368 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:53,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4290 states. [2023-02-18 05:38:53,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4290 to 3960. [2023-02-18 05:38:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3960 states, 3763 states have (on average 1.3986181238373638) internal successors, (5263), 3852 states have internal predecessors, (5263), 143 states have call successors, (143), 12 states have call predecessors, (143), 12 states have return successors, (143), 95 states have call predecessors, (143), 143 states have call successors, (143) [2023-02-18 05:38:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 5549 transitions. [2023-02-18 05:38:53,260 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 5549 transitions. Word has length 57 [2023-02-18 05:38:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:53,260 INFO L495 AbstractCegarLoop]: Abstraction has 3960 states and 5549 transitions. [2023-02-18 05:38:53,260 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) [2023-02-18 05:38:53,261 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 5549 transitions. [2023-02-18 05:38:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-18 05:38:53,262 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:53,262 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] [2023-02-18 05:38:53,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 05:38:53,468 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,SelfDestructingSolverStorable46 [2023-02-18 05:38:53,468 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:53,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:53,469 INFO L85 PathProgramCache]: Analyzing trace with hash 355545581, now seen corresponding path program 1 times [2023-02-18 05:38:53,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:53,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170096761] [2023-02-18 05:38:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:53,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:53,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:53,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 05:38:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:53,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:53,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:53,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170096761] [2023-02-18 05:38:53,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170096761] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:53,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:53,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2023-02-18 05:38:53,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099418474] [2023-02-18 05:38:53,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:53,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-18 05:38:53,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:53,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-18 05:38:53,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-18 05:38:53,931 INFO L87 Difference]: Start difference. First operand 3960 states and 5549 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:38:55,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:55,138 INFO L93 Difference]: Finished difference Result 7666 states and 10751 transitions. [2023-02-18 05:38:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-18 05:38:55,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2023-02-18 05:38:55,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:55,149 INFO L225 Difference]: With dead ends: 7666 [2023-02-18 05:38:55,149 INFO L226 Difference]: Without dead ends: 7655 [2023-02-18 05:38:55,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=329, Invalid=931, Unknown=0, NotChecked=0, Total=1260 [2023-02-18 05:38:55,150 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 1948 mSDsluCounter, 2126 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1948 SdHoareTripleChecker+Valid, 2371 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:55,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1948 Valid, 2371 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-18 05:38:55,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7655 states. [2023-02-18 05:38:55,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7655 to 3914. [2023-02-18 05:38:55,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3717 states have (on average 1.3917137476459511) internal successors, (5173), 3806 states have internal predecessors, (5173), 143 states have call successors, (143), 12 states have call predecessors, (143), 12 states have return successors, (143), 95 states have call predecessors, (143), 143 states have call successors, (143) [2023-02-18 05:38:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 5459 transitions. [2023-02-18 05:38:55,195 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 5459 transitions. Word has length 58 [2023-02-18 05:38:55,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:55,195 INFO L495 AbstractCegarLoop]: Abstraction has 3914 states and 5459 transitions. [2023-02-18 05:38:55,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 05:38:55,195 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 5459 transitions. [2023-02-18 05:38:55,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 05:38:55,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:55,198 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] [2023-02-18 05:38:55,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2023-02-18 05:38:55,198 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:55,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:55,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1061403003, now seen corresponding path program 1 times [2023-02-18 05:38:55,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:55,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967870810] [2023-02-18 05:38:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:55,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:55,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:55,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:55,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:55,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967870810] [2023-02-18 05:38:55,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967870810] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:55,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:55,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-02-18 05:38:55,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365674609] [2023-02-18 05:38:55,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:55,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 05:38:55,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:55,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 05:38:55,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-02-18 05:38:55,621 INFO L87 Difference]: Start difference. First operand 3914 states and 5459 transitions. Second operand has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 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) [2023-02-18 05:38:56,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:56,512 INFO L93 Difference]: Finished difference Result 7033 states and 9948 transitions. [2023-02-18 05:38:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-18 05:38:56,517 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 [2023-02-18 05:38:56,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:56,527 INFO L225 Difference]: With dead ends: 7033 [2023-02-18 05:38:56,527 INFO L226 Difference]: Without dead ends: 7033 [2023-02-18 05:38:56,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=1057, Unknown=0, NotChecked=0, Total=1332 [2023-02-18 05:38:56,528 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 1963 mSDsluCounter, 1493 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1966 SdHoareTripleChecker+Valid, 1645 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:56,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1966 Valid, 1645 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 05:38:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7033 states. [2023-02-18 05:38:56,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7033 to 5065. [2023-02-18 05:38:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5065 states, 4815 states have (on average 1.4134994807892005) internal successors, (6806), 4932 states have internal predecessors, (6806), 191 states have call successors, (191), 17 states have call predecessors, (191), 17 states have return successors, (191), 115 states have call predecessors, (191), 191 states have call successors, (191) [2023-02-18 05:38:56,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5065 states to 5065 states and 7188 transitions. [2023-02-18 05:38:56,581 INFO L78 Accepts]: Start accepts. Automaton has 5065 states and 7188 transitions. Word has length 59 [2023-02-18 05:38:56,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:56,581 INFO L495 AbstractCegarLoop]: Abstraction has 5065 states and 7188 transitions. [2023-02-18 05:38:56,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.5625) internal successors, (57), 15 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) [2023-02-18 05:38:56,582 INFO L276 IsEmpty]: Start isEmpty. Operand 5065 states and 7188 transitions. [2023-02-18 05:38:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-18 05:38:56,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:56,582 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] [2023-02-18 05:38:56,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2023-02-18 05:38:56,583 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:56,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:56,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1870749629, now seen corresponding path program 1 times [2023-02-18 05:38:56,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:56,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662312621] [2023-02-18 05:38:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:56,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:56,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:56,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:56,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:56,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662312621] [2023-02-18 05:38:56,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662312621] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:56,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:56,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 05:38:56,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491299498] [2023-02-18 05:38:56,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:56,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 05:38:56,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 05:38:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 05:38:56,818 INFO L87 Difference]: Start difference. First operand 5065 states and 7188 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) [2023-02-18 05:38:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:57,168 INFO L93 Difference]: Finished difference Result 6287 states and 8981 transitions. [2023-02-18 05:38:57,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 05:38:57,169 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 [2023-02-18 05:38:57,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:57,177 INFO L225 Difference]: With dead ends: 6287 [2023-02-18 05:38:57,177 INFO L226 Difference]: Without dead ends: 6287 [2023-02-18 05:38:57,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2023-02-18 05:38:57,178 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 1074 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1074 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:57,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1074 Valid, 860 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:57,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6287 states. [2023-02-18 05:38:57,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6287 to 5285. [2023-02-18 05:38:57,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 5029 states have (on average 1.423941141379996) internal successors, (7161), 5148 states have internal predecessors, (7161), 196 states have call successors, (196), 18 states have call predecessors, (196), 18 states have return successors, (196), 118 states have call predecessors, (196), 196 states have call successors, (196) [2023-02-18 05:38:57,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 7553 transitions. [2023-02-18 05:38:57,229 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 7553 transitions. Word has length 59 [2023-02-18 05:38:57,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:57,229 INFO L495 AbstractCegarLoop]: Abstraction has 5285 states and 7553 transitions. [2023-02-18 05:38:57,229 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) [2023-02-18 05:38:57,229 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 7553 transitions. [2023-02-18 05:38:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 05:38:57,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:57,231 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] [2023-02-18 05:38:57,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2023-02-18 05:38:57,231 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:57,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1910438407, now seen corresponding path program 1 times [2023-02-18 05:38:57,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:57,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085720058] [2023-02-18 05:38:57,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:57,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:57,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:57,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:57,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 05:38:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:38:57,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:57,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085720058] [2023-02-18 05:38:57,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085720058] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:57,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:57,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-18 05:38:57,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411827428] [2023-02-18 05:38:57,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:57,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 05:38:57,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:57,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 05:38:57,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-02-18 05:38:57,382 INFO L87 Difference]: Start difference. First operand 5285 states and 7553 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) [2023-02-18 05:38:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:57,571 INFO L93 Difference]: Finished difference Result 5365 states and 7525 transitions. [2023-02-18 05:38:57,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 05:38:57,572 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 [2023-02-18 05:38:57,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:57,579 INFO L225 Difference]: With dead ends: 5365 [2023-02-18 05:38:57,579 INFO L226 Difference]: Without dead ends: 5365 [2023-02-18 05:38:57,579 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 [2023-02-18 05:38:57,579 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 318 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:57,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 443 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:38:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5365 states. [2023-02-18 05:38:57,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5365 to 5283. [2023-02-18 05:38:57,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5283 states, 5029 states have (on average 1.3961026048916285) internal successors, (7021), 5146 states have internal predecessors, (7021), 196 states have call successors, (196), 18 states have call predecessors, (196), 18 states have return successors, (196), 118 states have call predecessors, (196), 196 states have call successors, (196) [2023-02-18 05:38:57,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5283 states to 5283 states and 7413 transitions. [2023-02-18 05:38:57,622 INFO L78 Accepts]: Start accepts. Automaton has 5283 states and 7413 transitions. Word has length 60 [2023-02-18 05:38:57,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:57,623 INFO L495 AbstractCegarLoop]: Abstraction has 5283 states and 7413 transitions. [2023-02-18 05:38:57,623 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) [2023-02-18 05:38:57,623 INFO L276 IsEmpty]: Start isEmpty. Operand 5283 states and 7413 transitions. [2023-02-18 05:38:57,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-18 05:38:57,624 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:57,624 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] [2023-02-18 05:38:57,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2023-02-18 05:38:57,624 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:57,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1346211993, now seen corresponding path program 1 times [2023-02-18 05:38:57,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:57,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908107015] [2023-02-18 05:38:57,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:57,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:57,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:57,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:57,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 05:38:57,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:57,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 05:38:57,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:57,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908107015] [2023-02-18 05:38:57,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908107015] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:57,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:57,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 05:38:57,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980057240] [2023-02-18 05:38:57,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:57,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 05:38:57,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:57,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 05:38:57,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 05:38:57,654 INFO L87 Difference]: Start difference. First operand 5283 states and 7413 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) [2023-02-18 05:38:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:57,668 INFO L93 Difference]: Finished difference Result 5283 states and 7375 transitions. [2023-02-18 05:38:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 05:38:57,668 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 [2023-02-18 05:38:57,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:57,680 INFO L225 Difference]: With dead ends: 5283 [2023-02-18 05:38:57,680 INFO L226 Difference]: Without dead ends: 5283 [2023-02-18 05:38:57,680 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 [2023-02-18 05:38:57,681 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 0 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 312 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 [2023-02-18 05:38:57,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 312 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5283 states. [2023-02-18 05:38:57,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5283 to 5283. [2023-02-18 05:38:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5283 states, 5029 states have (on average 1.3885464307019288) internal successors, (6983), 5146 states have internal predecessors, (6983), 196 states have call successors, (196), 18 states have call predecessors, (196), 18 states have return successors, (196), 118 states have call predecessors, (196), 196 states have call successors, (196) [2023-02-18 05:38:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5283 states to 5283 states and 7375 transitions. [2023-02-18 05:38:57,719 INFO L78 Accepts]: Start accepts. Automaton has 5283 states and 7375 transitions. Word has length 60 [2023-02-18 05:38:57,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:57,720 INFO L495 AbstractCegarLoop]: Abstraction has 5283 states and 7375 transitions. [2023-02-18 05:38:57,720 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) [2023-02-18 05:38:57,720 INFO L276 IsEmpty]: Start isEmpty. Operand 5283 states and 7375 transitions. [2023-02-18 05:38:57,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-18 05:38:57,720 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:57,721 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] [2023-02-18 05:38:57,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2023-02-18 05:38:57,721 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:57,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:57,722 INFO L85 PathProgramCache]: Analyzing trace with hash -707292911, now seen corresponding path program 1 times [2023-02-18 05:38:57,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:57,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225181756] [2023-02-18 05:38:57,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:57,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:57,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:57,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:57,766 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:57,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:57,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225181756] [2023-02-18 05:38:57,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225181756] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:57,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456021436] [2023-02-18 05:38:57,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:57,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:57,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:57,768 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) [2023-02-18 05:38:57,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 05:38:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:57,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-18 05:38:57,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:57,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:57,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:38:57,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:57,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456021436] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:38:57,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:38:57,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2023-02-18 05:38:57,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224031109] [2023-02-18 05:38:57,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:38:57,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:57,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:57,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:57,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:57,970 INFO L87 Difference]: Start difference. First operand 5283 states and 7375 transitions. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2023-02-18 05:38:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:58,016 INFO L93 Difference]: Finished difference Result 12258 states and 17085 transitions. [2023-02-18 05:38:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 05:38:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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 [2023-02-18 05:38:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:58,033 INFO L225 Difference]: With dead ends: 12258 [2023-02-18 05:38:58,033 INFO L226 Difference]: Without dead ends: 12258 [2023-02-18 05:38:58,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:58,035 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 682 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 688 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:58,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [688 Valid, 993 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:58,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12258 states. [2023-02-18 05:38:58,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12258 to 8120. [2023-02-18 05:38:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8120 states, 7766 states have (on average 1.3942827710533092) internal successors, (10828), 7905 states have internal predecessors, (10828), 296 states have call successors, (296), 18 states have call predecessors, (296), 18 states have return successors, (296), 196 states have call predecessors, (296), 296 states have call successors, (296) [2023-02-18 05:38:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8120 states to 8120 states and 11420 transitions. [2023-02-18 05:38:58,136 INFO L78 Accepts]: Start accepts. Automaton has 8120 states and 11420 transitions. Word has length 62 [2023-02-18 05:38:58,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:58,137 INFO L495 AbstractCegarLoop]: Abstraction has 8120 states and 11420 transitions. [2023-02-18 05:38:58,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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) [2023-02-18 05:38:58,137 INFO L276 IsEmpty]: Start isEmpty. Operand 8120 states and 11420 transitions. [2023-02-18 05:38:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 05:38:58,138 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:58,138 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] [2023-02-18 05:38:58,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-18 05:38:58,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:58,357 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:58,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:58,358 INFO L85 PathProgramCache]: Analyzing trace with hash 940111791, now seen corresponding path program 1 times [2023-02-18 05:38:58,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:58,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757095021] [2023-02-18 05:38:58,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:58,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:58,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:58,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:58,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 05:38:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:58,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-18 05:38:58,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:58,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757095021] [2023-02-18 05:38:58,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757095021] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:58,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:58,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 05:38:58,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058571286] [2023-02-18 05:38:58,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:58,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 05:38:58,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:58,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 05:38:58,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:58,413 INFO L87 Difference]: Start difference. First operand 8120 states and 11420 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) [2023-02-18 05:38:58,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:58,450 INFO L93 Difference]: Finished difference Result 15144 states and 21515 transitions. [2023-02-18 05:38:58,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 05:38:58,451 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 [2023-02-18 05:38:58,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:58,473 INFO L225 Difference]: With dead ends: 15144 [2023-02-18 05:38:58,474 INFO L226 Difference]: Without dead ends: 15144 [2023-02-18 05:38:58,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 05:38:58,474 INFO L413 NwaCegarLoop]: 337 mSDtfsCounter, 281 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:58,474 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 716 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 05:38:58,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15144 states. [2023-02-18 05:38:58,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15144 to 8176. [2023-02-18 05:38:58,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8176 states, 7822 states have (on average 1.392738430069036) internal successors, (10894), 7961 states have internal predecessors, (10894), 296 states have call successors, (296), 18 states have call predecessors, (296), 18 states have return successors, (296), 196 states have call predecessors, (296), 296 states have call successors, (296) [2023-02-18 05:38:58,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 11486 transitions. [2023-02-18 05:38:58,580 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 11486 transitions. Word has length 63 [2023-02-18 05:38:58,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:58,581 INFO L495 AbstractCegarLoop]: Abstraction has 8176 states and 11486 transitions. [2023-02-18 05:38:58,581 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) [2023-02-18 05:38:58,581 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 11486 transitions. [2023-02-18 05:38:58,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 05:38:58,582 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:58,582 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] [2023-02-18 05:38:58,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2023-02-18 05:38:58,583 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:58,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:58,583 INFO L85 PathProgramCache]: Analyzing trace with hash 940111853, now seen corresponding path program 1 times [2023-02-18 05:38:58,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:58,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632775560] [2023-02-18 05:38:58,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:58,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:58,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:58,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:58,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 05:38:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:58,635 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 05:38:58,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:58,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632775560] [2023-02-18 05:38:58,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632775560] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:58,636 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:58,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:38:58,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75634622] [2023-02-18 05:38:58,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:58,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:58,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:58,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:58,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:58,637 INFO L87 Difference]: Start difference. First operand 8176 states and 11486 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) [2023-02-18 05:38:58,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:58,831 INFO L93 Difference]: Finished difference Result 8796 states and 12549 transitions. [2023-02-18 05:38:58,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 05:38:58,831 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 [2023-02-18 05:38:58,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:58,842 INFO L225 Difference]: With dead ends: 8796 [2023-02-18 05:38:58,843 INFO L226 Difference]: Without dead ends: 8796 [2023-02-18 05:38:58,843 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 [2023-02-18 05:38:58,844 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 142 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:58,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 619 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:58,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8796 states. [2023-02-18 05:38:58,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8796 to 8176. [2023-02-18 05:38:58,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8176 states, 7822 states have (on average 1.3897980056251598) internal successors, (10871), 7961 states have internal predecessors, (10871), 296 states have call successors, (296), 18 states have call predecessors, (296), 18 states have return successors, (296), 196 states have call predecessors, (296), 296 states have call successors, (296) [2023-02-18 05:38:58,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8176 states to 8176 states and 11463 transitions. [2023-02-18 05:38:58,918 INFO L78 Accepts]: Start accepts. Automaton has 8176 states and 11463 transitions. Word has length 63 [2023-02-18 05:38:58,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:58,918 INFO L495 AbstractCegarLoop]: Abstraction has 8176 states and 11463 transitions. [2023-02-18 05:38:58,919 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) [2023-02-18 05:38:58,919 INFO L276 IsEmpty]: Start isEmpty. Operand 8176 states and 11463 transitions. [2023-02-18 05:38:58,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 05:38:58,920 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:58,920 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] [2023-02-18 05:38:58,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-02-18 05:38:58,920 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:58,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:58,921 INFO L85 PathProgramCache]: Analyzing trace with hash 940111854, now seen corresponding path program 1 times [2023-02-18 05:38:58,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:58,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119981913] [2023-02-18 05:38:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:58,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:59,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:59,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 05:38:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 05:38:59,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:59,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119981913] [2023-02-18 05:38:59,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119981913] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:38:59,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:38:59,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:38:59,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382577843] [2023-02-18 05:38:59,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:38:59,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:38:59,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:38:59,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:38:59,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:38:59,004 INFO L87 Difference]: Start difference. First operand 8176 states and 11463 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) [2023-02-18 05:38:59,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:38:59,138 INFO L93 Difference]: Finished difference Result 8172 states and 11267 transitions. [2023-02-18 05:38:59,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-18 05:38:59,139 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 [2023-02-18 05:38:59,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:38:59,149 INFO L225 Difference]: With dead ends: 8172 [2023-02-18 05:38:59,150 INFO L226 Difference]: Without dead ends: 8172 [2023-02-18 05:38:59,150 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 [2023-02-18 05:38:59,150 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 146 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 05:38:59,150 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 594 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 05:38:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2023-02-18 05:38:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 8172. [2023-02-18 05:38:59,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8172 states, 7822 states have (on average 1.3647404755816928) internal successors, (10675), 7957 states have internal predecessors, (10675), 296 states have call successors, (296), 18 states have call predecessors, (296), 18 states have return successors, (296), 196 states have call predecessors, (296), 296 states have call successors, (296) [2023-02-18 05:38:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8172 states to 8172 states and 11267 transitions. [2023-02-18 05:38:59,217 INFO L78 Accepts]: Start accepts. Automaton has 8172 states and 11267 transitions. Word has length 63 [2023-02-18 05:38:59,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:38:59,217 INFO L495 AbstractCegarLoop]: Abstraction has 8172 states and 11267 transitions. [2023-02-18 05:38:59,218 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) [2023-02-18 05:38:59,218 INFO L276 IsEmpty]: Start isEmpty. Operand 8172 states and 11267 transitions. [2023-02-18 05:38:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 05:38:59,218 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:38:59,219 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] [2023-02-18 05:38:59,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-02-18 05:38:59,219 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:38:59,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:38:59,219 INFO L85 PathProgramCache]: Analyzing trace with hash -451244996, now seen corresponding path program 1 times [2023-02-18 05:38:59,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:38:59,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370616269] [2023-02-18 05:38:59,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:59,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:38:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:59,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:38:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:59,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:59,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:38:59,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370616269] [2023-02-18 05:38:59,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370616269] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:38:59,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422736638] [2023-02-18 05:38:59,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:38:59,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:38:59,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:38:59,530 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) [2023-02-18 05:38:59,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 05:38:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:38:59,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-18 05:38:59,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:38:59,882 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 [2023-02-18 05:38:59,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:38:59,911 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 [2023-02-18 05:38:59,964 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 [2023-02-18 05:38:59,979 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 40 treesize of output 36 [2023-02-18 05:38:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:38:59,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:39:00,058 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (* ~unnamed1~0~LIST_END (- 1)))) (let ((.cse0 (<= (+ ~unnamed1~0~LIST_BEG 1 .cse2) 0)) (.cse1 (= ~unnamed1~0~LIST_BEG 0))) (and (or .cse0 (= (+ ~unnamed1~0~LIST_END (- 1)) 0)) .cse1 (or (not .cse0) (and (or (= (+ ~unnamed1~0~LIST_BEG .cse2) 0) (forall ((v_ArrVal_1469 Int)) (= (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_append_one_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |c_ULTIMATE.start_append_one_~list#1.offset|) v_ArrVal_1469)) |c_~#list~0.base|) (+ |c_~#list~0.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) |c_ULTIMATE.start_main_old_#valid#1|)) (<= 0 (+ ~unnamed1~0~LIST_BEG (- 1)))) .cse1))))) is different from false [2023-02-18 05:39:00,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 142 [2023-02-18 05:39:01,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422736638] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:39:01,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 05:39:01,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2023-02-18 05:39:01,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640408839] [2023-02-18 05:39:01,685 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 05:39:01,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-18 05:39:01,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:39:01,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-18 05:39:01,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=810, Unknown=1, NotChecked=58, Total=992 [2023-02-18 05:39:01,686 INFO L87 Difference]: Start difference. First operand 8172 states and 11267 transitions. Second operand has 24 states, 23 states have (on average 5.043478260869565) internal successors, (116), 24 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) [2023-02-18 05:39:02,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:39:02,409 INFO L93 Difference]: Finished difference Result 8428 states and 11601 transitions. [2023-02-18 05:39:02,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 05:39:02,410 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.043478260869565) internal successors, (116), 24 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 [2023-02-18 05:39:02,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:39:02,423 INFO L225 Difference]: With dead ends: 8428 [2023-02-18 05:39:02,423 INFO L226 Difference]: Without dead ends: 8417 [2023-02-18 05:39:02,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 94 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=311, Invalid=1174, Unknown=1, NotChecked=74, Total=1560 [2023-02-18 05:39:02,424 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 884 mSDsluCounter, 1253 mSDsCounter, 0 mSdLazyCounter, 1044 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 1396 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 05:39:02,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [885 Valid, 1396 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1044 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 05:39:02,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8417 states. [2023-02-18 05:39:02,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8417 to 8200. [2023-02-18 05:39:02,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8200 states, 7850 states have (on average 1.3643312101910827) internal successors, (10710), 7985 states have internal predecessors, (10710), 296 states have call successors, (296), 18 states have call predecessors, (296), 18 states have return successors, (296), 196 states have call predecessors, (296), 296 states have call successors, (296) [2023-02-18 05:39:02,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8200 states to 8200 states and 11302 transitions. [2023-02-18 05:39:02,495 INFO L78 Accepts]: Start accepts. Automaton has 8200 states and 11302 transitions. Word has length 63 [2023-02-18 05:39:02,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:39:02,495 INFO L495 AbstractCegarLoop]: Abstraction has 8200 states and 11302 transitions. [2023-02-18 05:39:02,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.043478260869565) internal successors, (116), 24 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) [2023-02-18 05:39:02,495 INFO L276 IsEmpty]: Start isEmpty. Operand 8200 states and 11302 transitions. [2023-02-18 05:39:02,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-18 05:39:02,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:39:02,496 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] [2023-02-18 05:39:02,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 05:39:02,701 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,SelfDestructingSolverStorable56 [2023-02-18 05:39:02,702 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:39:02,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:39:02,702 INFO L85 PathProgramCache]: Analyzing trace with hash -193079558, now seen corresponding path program 1 times [2023-02-18 05:39:02,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:39:02,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725263572] [2023-02-18 05:39:02,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:02,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:39:02,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:03,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:39:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:39:03,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:39:03,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725263572] [2023-02-18 05:39:03,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725263572] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:39:03,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751232840] [2023-02-18 05:39:03,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:03,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:39:03,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:39:03,008 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) [2023-02-18 05:39:03,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 05:39:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:03,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-18 05:39:03,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:39:03,288 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 [2023-02-18 05:39:03,375 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:39:03,376 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 [2023-02-18 05:39:03,387 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 22 treesize of output 18 [2023-02-18 05:39:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:39:03,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:39:03,441 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 62 treesize of output 54 [2023-02-18 05:39:03,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751232840] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:39:03,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 05:39:03,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-02-18 05:39:03,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247982505] [2023-02-18 05:39:03,743 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 05:39:03,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-18 05:39:03,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:39:03,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-18 05:39:03,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2023-02-18 05:39:03,744 INFO L87 Difference]: Start difference. First operand 8200 states and 11302 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) [2023-02-18 05:39:04,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:39:04,533 INFO L93 Difference]: Finished difference Result 8420 states and 11592 transitions. [2023-02-18 05:39:04,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-18 05:39:04,533 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 [2023-02-18 05:39:04,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:39:04,546 INFO L225 Difference]: With dead ends: 8420 [2023-02-18 05:39:04,546 INFO L226 Difference]: Without dead ends: 8407 [2023-02-18 05:39:04,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=338, Invalid=1384, Unknown=0, NotChecked=0, Total=1722 [2023-02-18 05:39:04,547 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 1158 mSDsluCounter, 1456 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1158 SdHoareTripleChecker+Valid, 1599 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 05:39:04,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1158 Valid, 1599 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 05:39:04,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8407 states. [2023-02-18 05:39:04,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8407 to 8198. [2023-02-18 05:39:04,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8198 states, 7848 states have (on average 1.3641692150866462) internal successors, (10706), 7983 states have internal predecessors, (10706), 296 states have call successors, (296), 18 states have call predecessors, (296), 18 states have return successors, (296), 196 states have call predecessors, (296), 296 states have call successors, (296) [2023-02-18 05:39:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8198 states to 8198 states and 11298 transitions. [2023-02-18 05:39:04,648 INFO L78 Accepts]: Start accepts. Automaton has 8198 states and 11298 transitions. Word has length 63 [2023-02-18 05:39:04,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:39:04,649 INFO L495 AbstractCegarLoop]: Abstraction has 8198 states and 11298 transitions. [2023-02-18 05:39:04,649 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) [2023-02-18 05:39:04,649 INFO L276 IsEmpty]: Start isEmpty. Operand 8198 states and 11298 transitions. [2023-02-18 05:39:04,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 05:39:04,650 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:39:04,650 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] [2023-02-18 05:39:04,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 05:39:04,855 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,SelfDestructingSolverStorable57 [2023-02-18 05:39:04,856 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:39:04,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:39:04,857 INFO L85 PathProgramCache]: Analyzing trace with hash -367739905, now seen corresponding path program 1 times [2023-02-18 05:39:04,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:39:04,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833494342] [2023-02-18 05:39:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:04,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:39:04,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:05,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:39:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:05,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 05:39:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:39:05,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:39:05,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833494342] [2023-02-18 05:39:05,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833494342] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:39:05,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:39:05,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 05:39:05,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132285746] [2023-02-18 05:39:05,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:39:05,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 05:39:05,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:39:05,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 05:39:05,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 05:39:05,143 INFO L87 Difference]: Start difference. First operand 8198 states and 11298 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) [2023-02-18 05:39:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:39:05,784 INFO L93 Difference]: Finished difference Result 10232 states and 13876 transitions. [2023-02-18 05:39:05,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 05:39:05,790 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 [2023-02-18 05:39:05,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:39:05,803 INFO L225 Difference]: With dead ends: 10232 [2023-02-18 05:39:05,816 INFO L226 Difference]: Without dead ends: 10232 [2023-02-18 05:39:05,817 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 [2023-02-18 05:39:05,817 INFO L413 NwaCegarLoop]: 271 mSDtfsCounter, 1061 mSDsluCounter, 1539 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 1810 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-18 05:39:05,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 1810 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-18 05:39:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10232 states. [2023-02-18 05:39:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10232 to 8198. [2023-02-18 05:39:05,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8198 states, 7848 states have (on average 1.3598369011213047) internal successors, (10672), 7983 states have internal predecessors, (10672), 296 states have call successors, (296), 18 states have call predecessors, (296), 18 states have return successors, (296), 196 states have call predecessors, (296), 296 states have call successors, (296) [2023-02-18 05:39:05,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8198 states to 8198 states and 11264 transitions. [2023-02-18 05:39:05,925 INFO L78 Accepts]: Start accepts. Automaton has 8198 states and 11264 transitions. Word has length 64 [2023-02-18 05:39:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:39:05,925 INFO L495 AbstractCegarLoop]: Abstraction has 8198 states and 11264 transitions. [2023-02-18 05:39:05,926 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) [2023-02-18 05:39:05,926 INFO L276 IsEmpty]: Start isEmpty. Operand 8198 states and 11264 transitions. [2023-02-18 05:39:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 05:39:05,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:39:05,927 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] [2023-02-18 05:39:05,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2023-02-18 05:39:05,927 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:39:05,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:39:05,927 INFO L85 PathProgramCache]: Analyzing trace with hash -966158781, now seen corresponding path program 1 times [2023-02-18 05:39:05,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:39:05,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757001326] [2023-02-18 05:39:05,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:05,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:39:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:06,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:39:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:06,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 05:39:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:39:06,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:39:06,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757001326] [2023-02-18 05:39:06,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757001326] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:39:06,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234994853] [2023-02-18 05:39:06,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:06,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:39:06,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:39:06,617 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) [2023-02-18 05:39:06,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 05:39:06,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:06,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-18 05:39:06,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:39:06,850 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 [2023-02-18 05:39:06,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:06,882 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 [2023-02-18 05:39:07,126 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 26 treesize of output 18 [2023-02-18 05:39:07,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:07,130 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:39:07,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 20 [2023-02-18 05:39:07,176 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:39:07,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:39:07,246 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:07,246 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 [2023-02-18 05:39:07,429 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 138 treesize of output 130 [2023-02-18 05:39:07,682 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 05:39:07,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234994853] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 05:39:07,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 05:39:07,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 16] total 49 [2023-02-18 05:39:07,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946109454] [2023-02-18 05:39:07,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 05:39:07,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-18 05:39:07,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:39:07,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-18 05:39:07,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2023-02-18 05:39:07,684 INFO L87 Difference]: Start difference. First operand 8198 states and 11264 transitions. Second operand has 50 states, 49 states have (on average 3.63265306122449) internal successors, (178), 46 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) [2023-02-18 05:39:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:39:30,889 INFO L93 Difference]: Finished difference Result 30482 states and 42641 transitions. [2023-02-18 05:39:30,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-02-18 05:39:30,890 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 3.63265306122449) internal successors, (178), 46 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 [2023-02-18 05:39:30,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:39:30,930 INFO L225 Difference]: With dead ends: 30482 [2023-02-18 05:39:30,931 INFO L226 Difference]: Without dead ends: 30482 [2023-02-18 05:39:30,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7424 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4065, Invalid=19795, Unknown=10, NotChecked=0, Total=23870 [2023-02-18 05:39:30,933 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 6905 mSDsluCounter, 7309 mSDsCounter, 0 mSdLazyCounter, 4555 mSolverCounterSat, 716 mSolverCounterUnsat, 48 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6906 SdHoareTripleChecker+Valid, 7621 SdHoareTripleChecker+Invalid, 5319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 716 IncrementalHoareTripleChecker+Valid, 4555 IncrementalHoareTripleChecker+Invalid, 48 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.7s IncrementalHoareTripleChecker+Time [2023-02-18 05:39:30,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6906 Valid, 7621 Invalid, 5319 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [716 Valid, 4555 Invalid, 48 Unknown, 0 Unchecked, 16.7s Time] [2023-02-18 05:39:30,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30482 states. [2023-02-18 05:39:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30482 to 8642. [2023-02-18 05:39:31,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8642 states, 8282 states have (on average 1.3609031634870805) internal successors, (11271), 8416 states have internal predecessors, (11271), 306 states have call successors, (306), 19 states have call predecessors, (306), 19 states have return successors, (306), 206 states have call predecessors, (306), 306 states have call successors, (306) [2023-02-18 05:39:31,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8642 states to 8642 states and 11883 transitions. [2023-02-18 05:39:31,137 INFO L78 Accepts]: Start accepts. Automaton has 8642 states and 11883 transitions. Word has length 64 [2023-02-18 05:39:31,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:39:31,138 INFO L495 AbstractCegarLoop]: Abstraction has 8642 states and 11883 transitions. [2023-02-18 05:39:31,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 3.63265306122449) internal successors, (178), 46 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) [2023-02-18 05:39:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 8642 states and 11883 transitions. [2023-02-18 05:39:31,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-18 05:39:31,139 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:39:31,139 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] [2023-02-18 05:39:31,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 05:39:31,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-18 05:39:31,345 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:39:31,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:39:31,345 INFO L85 PathProgramCache]: Analyzing trace with hash -966158782, now seen corresponding path program 1 times [2023-02-18 05:39:31,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:39:31,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203188573] [2023-02-18 05:39:31,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:31,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:39:31,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:31,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:39:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:31,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 05:39:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-18 05:39:31,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:39:31,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203188573] [2023-02-18 05:39:31,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203188573] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:39:31,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:39:31,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 05:39:31,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639040328] [2023-02-18 05:39:31,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:39:31,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 05:39:31,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:39:31,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 05:39:31,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 05:39:31,408 INFO L87 Difference]: Start difference. First operand 8642 states and 11883 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) [2023-02-18 05:39:31,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:39:31,593 INFO L93 Difference]: Finished difference Result 13698 states and 18698 transitions. [2023-02-18 05:39:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 05:39:31,594 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 [2023-02-18 05:39:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:39:31,609 INFO L225 Difference]: With dead ends: 13698 [2023-02-18 05:39:31,610 INFO L226 Difference]: Without dead ends: 13698 [2023-02-18 05:39:31,619 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 [2023-02-18 05:39:31,630 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 121 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 05:39:31,630 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 813 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 05:39:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13698 states. [2023-02-18 05:39:31,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13698 to 8640. [2023-02-18 05:39:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8640 states, 8282 states have (on average 1.3471383723738228) internal successors, (11157), 8414 states have internal predecessors, (11157), 306 states have call successors, (306), 19 states have call predecessors, (306), 19 states have return successors, (306), 206 states have call predecessors, (306), 306 states have call successors, (306) [2023-02-18 05:39:31,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8640 states to 8640 states and 11769 transitions. [2023-02-18 05:39:31,752 INFO L78 Accepts]: Start accepts. Automaton has 8640 states and 11769 transitions. Word has length 64 [2023-02-18 05:39:31,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:39:31,752 INFO L495 AbstractCegarLoop]: Abstraction has 8640 states and 11769 transitions. [2023-02-18 05:39:31,752 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) [2023-02-18 05:39:31,752 INFO L276 IsEmpty]: Start isEmpty. Operand 8640 states and 11769 transitions. [2023-02-18 05:39:31,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-18 05:39:31,753 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:39:31,753 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:39:31,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2023-02-18 05:39:31,753 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:39:31,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:39:31,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1485673092, now seen corresponding path program 1 times [2023-02-18 05:39:31,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:39:31,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912481159] [2023-02-18 05:39:31,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:31,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:39:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:32,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:39:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:32,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 05:39:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:39:32,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:39:32,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912481159] [2023-02-18 05:39:32,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912481159] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:39:32,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:39:32,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2023-02-18 05:39:32,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860589150] [2023-02-18 05:39:32,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:39:32,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 05:39:32,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:39:32,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 05:39:32,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-02-18 05:39:32,384 INFO L87 Difference]: Start difference. First operand 8640 states and 11769 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) [2023-02-18 05:39:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:39:33,250 INFO L93 Difference]: Finished difference Result 9967 states and 13363 transitions. [2023-02-18 05:39:33,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 05:39:33,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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 [2023-02-18 05:39:33,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:39:33,262 INFO L225 Difference]: With dead ends: 9967 [2023-02-18 05:39:33,262 INFO L226 Difference]: Without dead ends: 9967 [2023-02-18 05:39:33,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2023-02-18 05:39:33,266 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 1133 mSDsluCounter, 1231 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1133 SdHoareTripleChecker+Valid, 1453 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 05:39:33,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1133 Valid, 1453 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 05:39:33,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9967 states. [2023-02-18 05:39:33,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9967 to 8629. [2023-02-18 05:39:33,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8629 states, 8271 states have (on average 1.3415548301293676) internal successors, (11096), 8403 states have internal predecessors, (11096), 306 states have call successors, (306), 19 states have call predecessors, (306), 19 states have return successors, (306), 206 states have call predecessors, (306), 306 states have call successors, (306) [2023-02-18 05:39:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8629 states to 8629 states and 11708 transitions. [2023-02-18 05:39:33,348 INFO L78 Accepts]: Start accepts. Automaton has 8629 states and 11708 transitions. Word has length 65 [2023-02-18 05:39:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:39:33,349 INFO L495 AbstractCegarLoop]: Abstraction has 8629 states and 11708 transitions. [2023-02-18 05:39:33,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 14 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) [2023-02-18 05:39:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 8629 states and 11708 transitions. [2023-02-18 05:39:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-18 05:39:33,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:39:33,350 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 05:39:33,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2023-02-18 05:39:33,350 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:39:33,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:39:33,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1484965091, now seen corresponding path program 1 times [2023-02-18 05:39:33,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:39:33,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936872421] [2023-02-18 05:39:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:33,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:39:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:33,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:39:33,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:33,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 05:39:33,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:39:33,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:39:33,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936872421] [2023-02-18 05:39:33,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936872421] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:39:33,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:39:33,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2023-02-18 05:39:33,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116540658] [2023-02-18 05:39:33,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:39:33,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 05:39:33,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:39:33,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 05:39:33,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-18 05:39:33,650 INFO L87 Difference]: Start difference. First operand 8629 states and 11708 transitions. Second operand has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 13 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) [2023-02-18 05:39:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:39:34,382 INFO L93 Difference]: Finished difference Result 10864 states and 14547 transitions. [2023-02-18 05:39:34,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-18 05:39:34,383 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 13 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 [2023-02-18 05:39:34,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:39:34,394 INFO L225 Difference]: With dead ends: 10864 [2023-02-18 05:39:34,394 INFO L226 Difference]: Without dead ends: 10864 [2023-02-18 05:39:34,394 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 [2023-02-18 05:39:34,394 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 949 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 949 SdHoareTripleChecker+Valid, 1711 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 05:39:34,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [949 Valid, 1711 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 05:39:34,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10864 states. [2023-02-18 05:39:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10864 to 8629. [2023-02-18 05:39:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8629 states, 8271 states have (on average 1.3374440817313504) internal successors, (11062), 8403 states have internal predecessors, (11062), 306 states have call successors, (306), 19 states have call predecessors, (306), 19 states have return successors, (306), 206 states have call predecessors, (306), 306 states have call successors, (306) [2023-02-18 05:39:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8629 states to 8629 states and 11674 transitions. [2023-02-18 05:39:34,475 INFO L78 Accepts]: Start accepts. Automaton has 8629 states and 11674 transitions. Word has length 65 [2023-02-18 05:39:34,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:39:34,478 INFO L495 AbstractCegarLoop]: Abstraction has 8629 states and 11674 transitions. [2023-02-18 05:39:34,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.916666666666667) internal successors, (59), 13 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) [2023-02-18 05:39:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 8629 states and 11674 transitions. [2023-02-18 05:39:34,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-18 05:39:34,479 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:39:34,479 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] [2023-02-18 05:39:34,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2023-02-18 05:39:34,479 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:39:34,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:39:34,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1210722175, now seen corresponding path program 1 times [2023-02-18 05:39:34,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:39:34,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672397300] [2023-02-18 05:39:34,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:34,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:39:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:34,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:39:34,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:34,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 05:39:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:39:34,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:39:34,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672397300] [2023-02-18 05:39:34,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672397300] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:39:34,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 05:39:34,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-18 05:39:34,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463986528] [2023-02-18 05:39:34,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:39:34,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 05:39:34,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:39:34,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 05:39:34,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-02-18 05:39:34,742 INFO L87 Difference]: Start difference. First operand 8629 states and 11674 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) [2023-02-18 05:39:35,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:39:35,580 INFO L93 Difference]: Finished difference Result 10709 states and 14514 transitions. [2023-02-18 05:39:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 05:39:35,580 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 [2023-02-18 05:39:35,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:39:35,590 INFO L225 Difference]: With dead ends: 10709 [2023-02-18 05:39:35,590 INFO L226 Difference]: Without dead ends: 10709 [2023-02-18 05:39:35,590 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 [2023-02-18 05:39:35,591 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 944 mSDsluCounter, 1482 mSDsCounter, 0 mSdLazyCounter, 1238 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 1709 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 05:39:35,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [946 Valid, 1709 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1238 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 05:39:35,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10709 states. [2023-02-18 05:39:35,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10709 to 8762. [2023-02-18 05:39:35,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8762 states, 8404 states have (on average 1.3374583531651594) internal successors, (11240), 8536 states have internal predecessors, (11240), 306 states have call successors, (306), 19 states have call predecessors, (306), 19 states have return successors, (306), 206 states have call predecessors, (306), 306 states have call successors, (306) [2023-02-18 05:39:35,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8762 states to 8762 states and 11852 transitions. [2023-02-18 05:39:35,661 INFO L78 Accepts]: Start accepts. Automaton has 8762 states and 11852 transitions. Word has length 66 [2023-02-18 05:39:35,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:39:35,661 INFO L495 AbstractCegarLoop]: Abstraction has 8762 states and 11852 transitions. [2023-02-18 05:39:35,662 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) [2023-02-18 05:39:35,662 INFO L276 IsEmpty]: Start isEmpty. Operand 8762 states and 11852 transitions. [2023-02-18 05:39:35,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 05:39:35,662 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:39:35,663 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] [2023-02-18 05:39:35,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2023-02-18 05:39:35,663 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:39:35,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:39:35,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1122318501, now seen corresponding path program 1 times [2023-02-18 05:39:35,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:39:35,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83938288] [2023-02-18 05:39:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:35,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:39:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:36,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:39:36,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:36,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-18 05:39:36,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:39:36,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:39:36,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83938288] [2023-02-18 05:39:36,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83938288] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:39:36,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891140622] [2023-02-18 05:39:36,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:36,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:39:36,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:39:36,026 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) [2023-02-18 05:39:36,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 05:39:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:36,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-18 05:39:36,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:39:36,206 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:36,206 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 [2023-02-18 05:39:36,284 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 [2023-02-18 05:39:36,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:36,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:36,357 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:39:36,358 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 [2023-02-18 05:39:36,410 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 [2023-02-18 05:39:36,432 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 [2023-02-18 05:39:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:39:36,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 05:39:36,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891140622] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 05:39:36,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-18 05:39:36,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [15] total 26 [2023-02-18 05:39:36,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747270701] [2023-02-18 05:39:36,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 05:39:36,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 05:39:36,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 05:39:36,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 05:39:36,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2023-02-18 05:39:36,452 INFO L87 Difference]: Start difference. First operand 8762 states and 11852 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) [2023-02-18 05:39:37,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 05:39:37,735 INFO L93 Difference]: Finished difference Result 18933 states and 25759 transitions. [2023-02-18 05:39:37,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-18 05:39:37,736 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 [2023-02-18 05:39:37,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 05:39:37,756 INFO L225 Difference]: With dead ends: 18933 [2023-02-18 05:39:37,756 INFO L226 Difference]: Without dead ends: 18933 [2023-02-18 05:39:37,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=813, Invalid=2969, Unknown=0, NotChecked=0, Total=3782 [2023-02-18 05:39:37,758 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 1860 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1860 SdHoareTripleChecker+Valid, 2125 SdHoareTripleChecker+Invalid, 1502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-18 05:39:37,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1860 Valid, 2125 Invalid, 1502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-18 05:39:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18933 states. [2023-02-18 05:39:37,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18933 to 14096. [2023-02-18 05:39:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14096 states, 13536 states have (on average 1.3314864066193854) internal successors, (18023), 13720 states have internal predecessors, (18023), 494 states have call successors, (494), 33 states have call predecessors, (494), 33 states have return successors, (494), 342 states have call predecessors, (494), 494 states have call successors, (494) [2023-02-18 05:39:37,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14096 states to 14096 states and 19011 transitions. [2023-02-18 05:39:37,916 INFO L78 Accepts]: Start accepts. Automaton has 14096 states and 19011 transitions. Word has length 67 [2023-02-18 05:39:37,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 05:39:37,916 INFO L495 AbstractCegarLoop]: Abstraction has 14096 states and 19011 transitions. [2023-02-18 05:39:37,916 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) [2023-02-18 05:39:37,916 INFO L276 IsEmpty]: Start isEmpty. Operand 14096 states and 19011 transitions. [2023-02-18 05:39:37,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-18 05:39:37,917 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 05:39:37,917 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] [2023-02-18 05:39:37,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-18 05:39:38,123 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,SelfDestructingSolverStorable64 [2023-02-18 05:39:38,123 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2023-02-18 05:39:38,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 05:39:38,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1714217293, now seen corresponding path program 1 times [2023-02-18 05:39:38,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 05:39:38,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245985026] [2023-02-18 05:39:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:38,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 05:39:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:40,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-18 05:39:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:40,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2023-02-18 05:39:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:40,067 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-18 05:39:40,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 05:39:40,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245985026] [2023-02-18 05:39:40,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245985026] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 05:39:40,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138760075] [2023-02-18 05:39:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 05:39:40,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 05:39:40,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 05:39:40,070 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) [2023-02-18 05:39:40,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 05:39:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 05:39:40,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 124 conjunts are in the unsatisfiable core [2023-02-18 05:39:40,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 05:39:40,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:40,291 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 [2023-02-18 05:39:40,390 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 [2023-02-18 05:39:40,393 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 [2023-02-18 05:39:40,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:40,492 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 [2023-02-18 05:39:40,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:40,497 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 [2023-02-18 05:39:40,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:40,557 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 [2023-02-18 05:39:40,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:40,560 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 [2023-02-18 05:39:40,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:40,616 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 [2023-02-18 05:39:40,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:40,621 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 [2023-02-18 05:39:40,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:40,754 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 [2023-02-18 05:39:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:40,757 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 [2023-02-18 05:39:40,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:40,835 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 [2023-02-18 05:39:40,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:40,839 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:39:40,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:40,839 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 [2023-02-18 05:39:41,235 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:39:41,236 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:41,236 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 89 treesize of output 46 [2023-02-18 05:39:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 05:39:41,239 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:39:41,240 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:41,240 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 143 treesize of output 53 [2023-02-18 05:39:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 05:39:41,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 05:39:48,144 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:48,145 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 246 treesize of output 297 [2023-02-18 05:39:48,158 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:48,158 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 1 new quantified variables, introduced 3 case distinctions, treesize of input 150 treesize of output 249 [2023-02-18 05:39:48,167 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:48,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 3412 treesize of output 3498 [2023-02-18 05:39:48,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:48,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 14410 treesize of output 14084 [2023-02-18 05:39:48,219 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 22578 treesize of output 21570 [2023-02-18 05:39:48,293 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:48,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 41922 treesize of output 39510 [2023-02-18 05:39:48,457 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:48,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 108 [2023-02-18 05:39:48,557 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:39:48,559 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 05:39:48,562 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:48,562 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 92 [2023-02-18 05:39:52,999 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 05:39:53,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 38408 treesize of output 37856