./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/substring-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f4b24e32 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/array-memsafety/substring-alloca-2.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 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-14 06:09:14,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-14 06:09:14,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-14 06:09:14,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-14 06:09:14,218 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-14 06:09:14,219 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-14 06:09:14,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-14 06:09:14,225 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-14 06:09:14,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-14 06:09:14,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-14 06:09:14,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-14 06:09:14,244 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-14 06:09:14,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-14 06:09:14,246 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-14 06:09:14,247 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-14 06:09:14,248 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-14 06:09:14,249 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-14 06:09:14,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-14 06:09:14,252 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-14 06:09:14,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-14 06:09:14,257 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-14 06:09:14,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-14 06:09:14,258 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-14 06:09:14,259 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-14 06:09:14,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-14 06:09:14,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-14 06:09:14,265 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-14 06:09:14,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-14 06:09:14,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-14 06:09:14,267 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-14 06:09:14,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-14 06:09:14,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-14 06:09:14,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-14 06:09:14,281 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-14 06:09:14,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-14 06:09:14,282 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-14 06:09:14,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-14 06:09:14,283 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-14 06:09:14,283 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-14 06:09:14,283 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-14 06:09:14,284 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-14 06:09:14,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-14 06:09:14,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-14 06:09:14,324 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-14 06:09:14,324 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-14 06:09:14,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-14 06:09:14,325 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-14 06:09:14,325 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-14 06:09:14,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-14 06:09:14,326 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-14 06:09:14,326 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-14 06:09:14,326 INFO L138 SettingsManager]: * Use SBE=true [2022-07-14 06:09:14,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-14 06:09:14,327 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-14 06:09:14,327 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-14 06:09:14,327 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-14 06:09:14,327 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-14 06:09:14,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-14 06:09:14,328 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-14 06:09:14,328 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-14 06:09:14,328 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-14 06:09:14,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-14 06:09:14,328 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-14 06:09:14,328 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-14 06:09:14,328 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-14 06:09:14,329 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-14 06:09:14,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-14 06:09:14,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-14 06:09:14,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:09:14,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-14 06:09:14,329 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-14 06:09:14,330 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-14 06:09:14,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-14 06:09:14,330 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4cb6276eff0c60579b1d5f7034948eb4f53891709ff48cdd11b3329ec3c4cc2e [2022-07-14 06:09:14,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-14 06:09:14,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-14 06:09:14,712 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-14 06:09:14,713 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-14 06:09:14,713 INFO L275 PluginConnector]: CDTParser initialized [2022-07-14 06:09:14,714 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2022-07-14 06:09:14,794 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de91d7525/1e5e11a0d0b4488fa211a255a8898134/FLAG3776c8564 [2022-07-14 06:09:15,540 INFO L306 CDTParser]: Found 1 translation units. [2022-07-14 06:09:15,541 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/substring-alloca-2.i [2022-07-14 06:09:15,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de91d7525/1e5e11a0d0b4488fa211a255a8898134/FLAG3776c8564 [2022-07-14 06:09:15,806 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de91d7525/1e5e11a0d0b4488fa211a255a8898134 [2022-07-14 06:09:15,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-14 06:09:15,809 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-14 06:09:15,810 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-14 06:09:15,810 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-14 06:09:15,812 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-14 06:09:15,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:09:15" (1/1) ... [2022-07-14 06:09:15,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@275abf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:15, skipping insertion in model container [2022-07-14 06:09:15,829 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.07 06:09:15" (1/1) ... [2022-07-14 06:09:15,833 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-14 06:09:15,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-14 06:09:16,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:09:16,294 INFO L203 MainTranslator]: Completed pre-run [2022-07-14 06:09:16,353 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-14 06:09:16,387 INFO L208 MainTranslator]: Completed translation [2022-07-14 06:09:16,387 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:16 WrapperNode [2022-07-14 06:09:16,387 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-14 06:09:16,388 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-14 06:09:16,388 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-14 06:09:16,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-14 06:09:16,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:16" (1/1) ... [2022-07-14 06:09:16,429 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:16" (1/1) ... [2022-07-14 06:09:16,459 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 103 [2022-07-14 06:09:16,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-14 06:09:16,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-14 06:09:16,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-14 06:09:16,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-14 06:09:16,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:16" (1/1) ... [2022-07-14 06:09:16,475 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:16" (1/1) ... [2022-07-14 06:09:16,480 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:16" (1/1) ... [2022-07-14 06:09:16,480 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:16" (1/1) ... [2022-07-14 06:09:16,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:16" (1/1) ... [2022-07-14 06:09:16,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:16" (1/1) ... [2022-07-14 06:09:16,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:16" (1/1) ... [2022-07-14 06:09:16,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-14 06:09:16,522 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-14 06:09:16,522 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-14 06:09:16,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-14 06:09:16,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:16" (1/1) ... [2022-07-14 06:09:16,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-14 06:09:16,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:16,556 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-14 06:09:16,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-14 06:09:16,645 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-14 06:09:16,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-14 06:09:16,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-14 06:09:16,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-14 06:09:16,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-14 06:09:16,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-14 06:09:16,819 INFO L234 CfgBuilder]: Building ICFG [2022-07-14 06:09:16,820 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-14 06:09:17,176 INFO L275 CfgBuilder]: Performing block encoding [2022-07-14 06:09:17,180 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-14 06:09:17,183 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-14 06:09:17,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:09:17 BoogieIcfgContainer [2022-07-14 06:09:17,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-14 06:09:17,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-14 06:09:17,193 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-14 06:09:17,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-14 06:09:17,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.07 06:09:15" (1/3) ... [2022-07-14 06:09:17,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a231de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:09:17, skipping insertion in model container [2022-07-14 06:09:17,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.07 06:09:16" (2/3) ... [2022-07-14 06:09:17,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a231de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.07 06:09:17, skipping insertion in model container [2022-07-14 06:09:17,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.07 06:09:17" (3/3) ... [2022-07-14 06:09:17,198 INFO L111 eAbstractionObserver]: Analyzing ICFG substring-alloca-2.i [2022-07-14 06:09:17,213 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-14 06:09:17,227 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-14 06:09:17,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-14 06:09:17,307 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@cb351b2, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@28b01a10 [2022-07-14 06:09:17,308 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-14 06:09:17,325 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 32 states have (on average 1.96875) internal successors, (63), 51 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:09:17,353 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:17,354 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:17,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:17,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:17,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-14 06:09:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:17,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153946577] [2022-07-14 06:09:17,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:17,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:17,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:17,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:17,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153946577] [2022-07-14 06:09:17,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153946577] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:17,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:17,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:17,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961982600] [2022-07-14 06:09:17,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:17,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:17,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:17,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:17,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:17,660 INFO L87 Difference]: Start difference. First operand has 52 states, 32 states have (on average 1.96875) internal successors, (63), 51 states have internal predecessors, (63), 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) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:17,714 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2022-07-14 06:09:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:17,716 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:09:17,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:17,734 INFO L225 Difference]: With dead ends: 96 [2022-07-14 06:09:17,734 INFO L226 Difference]: Without dead ends: 92 [2022-07-14 06:09:17,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:17,738 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 94 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 108 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 [2022-07-14 06:09:17,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 108 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-14 06:09:17,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 53. [2022-07-14 06:09:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 52 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-14 06:09:17,781 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-07-14 06:09:17,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:17,781 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-14 06:09:17,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,782 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-14 06:09:17,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:09:17,782 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:17,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:17,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-14 06:09:17,783 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:17,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:17,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-14 06:09:17,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:17,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062062038] [2022-07-14 06:09:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:17,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:17,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:17,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:17,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062062038] [2022-07-14 06:09:17,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062062038] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:17,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:17,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-14 06:09:17,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785741419] [2022-07-14 06:09:17,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:17,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:09:17,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:09:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:09:17,926 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:17,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:17,965 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2022-07-14 06:09:17,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:09:17,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:09:17,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:17,991 INFO L225 Difference]: With dead ends: 51 [2022-07-14 06:09:17,991 INFO L226 Difference]: Without dead ends: 51 [2022-07-14 06:09:17,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:09:17,996 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:17,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:17,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-14 06:09:18,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-14 06:09:18,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 50 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2022-07-14 06:09:18,009 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 7 [2022-07-14 06:09:18,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:18,010 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2022-07-14 06:09:18,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2022-07-14 06:09:18,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-14 06:09:18,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:18,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:18,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-14 06:09:18,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:18,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:18,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-14 06:09:18,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:18,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43523991] [2022-07-14 06:09:18,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:18,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:18,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:18,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:18,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43523991] [2022-07-14 06:09:18,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43523991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:18,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:18,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:09:18,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745928029] [2022-07-14 06:09:18,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:18,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:18,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:18,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:18,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:18,143 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:18,261 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2022-07-14 06:09:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:18,262 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-14 06:09:18,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:18,263 INFO L225 Difference]: With dead ends: 93 [2022-07-14 06:09:18,264 INFO L226 Difference]: Without dead ends: 93 [2022-07-14 06:09:18,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:18,269 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 48 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:18,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 94 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-14 06:09:18,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2022-07-14 06:09:18,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 52 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-07-14 06:09:18,288 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 7 [2022-07-14 06:09:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:18,289 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-07-14 06:09:18,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,289 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-07-14 06:09:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:09:18,290 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:18,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:18,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-14 06:09:18,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:18,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:18,291 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-14 06:09:18,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:18,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048685256] [2022-07-14 06:09:18,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:18,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:18,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:18,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048685256] [2022-07-14 06:09:18,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048685256] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:18,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:18,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:09:18,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122706350] [2022-07-14 06:09:18,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:18,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:18,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:18,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:18,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:18,394 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:18,441 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2022-07-14 06:09:18,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:18,442 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-07-14 06:09:18,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:18,443 INFO L225 Difference]: With dead ends: 52 [2022-07-14 06:09:18,443 INFO L226 Difference]: Without dead ends: 52 [2022-07-14 06:09:18,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:18,444 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 93 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:18,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-14 06:09:18,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-07-14 06:09:18,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 51 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2022-07-14 06:09:18,447 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 9 [2022-07-14 06:09:18,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:18,447 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2022-07-14 06:09:18,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,447 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2022-07-14 06:09:18,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:09:18,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:18,448 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:18,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-14 06:09:18,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:18,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:18,449 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-14 06:09:18,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:18,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333548474] [2022-07-14 06:09:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:18,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:18,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:18,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333548474] [2022-07-14 06:09:18,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333548474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:18,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:18,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:18,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304632138] [2022-07-14 06:09:18,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:18,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:18,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:18,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:18,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:18,527 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:18,544 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2022-07-14 06:09:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:18,552 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 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 9 [2022-07-14 06:09:18,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:18,554 INFO L225 Difference]: With dead ends: 94 [2022-07-14 06:09:18,556 INFO L226 Difference]: Without dead ends: 94 [2022-07-14 06:09:18,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:18,557 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 74 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:18,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:18,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-14 06:09:18,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2022-07-14 06:09:18,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 47 states have (on average 1.5957446808510638) internal successors, (75), 62 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-14 06:09:18,565 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2022-07-14 06:09:18,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:18,566 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-14 06:09:18,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-14 06:09:18,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:09:18,573 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:18,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:18,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-14 06:09:18,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:18,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:18,577 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-14 06:09:18,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:18,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405951551] [2022-07-14 06:09:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:18,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:18,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:18,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405951551] [2022-07-14 06:09:18,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405951551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:18,663 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:18,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:18,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336394938] [2022-07-14 06:09:18,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:18,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:09:18,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:18,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:09:18,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:18,676 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:18,739 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-07-14 06:09:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:09:18,740 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-07-14 06:09:18,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:18,741 INFO L225 Difference]: With dead ends: 98 [2022-07-14 06:09:18,741 INFO L226 Difference]: Without dead ends: 98 [2022-07-14 06:09:18,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:18,743 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 155 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:18,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:18,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-14 06:09:18,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 61. [2022-07-14 06:09:18,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 47 states have (on average 1.553191489361702) internal successors, (73), 60 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 73 transitions. [2022-07-14 06:09:18,753 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 73 transitions. Word has length 9 [2022-07-14 06:09:18,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:18,753 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 73 transitions. [2022-07-14 06:09:18,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,754 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 73 transitions. [2022-07-14 06:09:18,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-14 06:09:18,754 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:18,755 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:18,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-14 06:09:18,755 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:18,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:18,755 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-14 06:09:18,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:18,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113819424] [2022-07-14 06:09:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:18,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:18,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:18,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113819424] [2022-07-14 06:09:18,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113819424] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:18,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:18,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:18,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787898690] [2022-07-14 06:09:18,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:18,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:09:18,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:18,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:09:18,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:18,880 INFO L87 Difference]: Start difference. First operand 61 states and 73 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:18,962 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2022-07-14 06:09:18,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:09:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 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 9 [2022-07-14 06:09:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:18,963 INFO L225 Difference]: With dead ends: 94 [2022-07-14 06:09:18,963 INFO L226 Difference]: Without dead ends: 94 [2022-07-14 06:09:18,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:09:18,964 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 82 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:18,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 88 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:18,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-14 06:09:18,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 63. [2022-07-14 06:09:18,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 62 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2022-07-14 06:09:18,985 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 9 [2022-07-14 06:09:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:18,985 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2022-07-14 06:09:18,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2022-07-14 06:09:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-14 06:09:18,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:18,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:18,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-14 06:09:18,986 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:18,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:18,987 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-14 06:09:18,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:18,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560434151] [2022-07-14 06:09:18,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:18,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:19,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:19,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:19,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560434151] [2022-07-14 06:09:19,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560434151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:19,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:19,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:09:19,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349068929] [2022-07-14 06:09:19,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:19,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:19,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:19,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:19,071 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:19,091 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2022-07-14 06:09:19,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:19,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-14 06:09:19,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:19,092 INFO L225 Difference]: With dead ends: 62 [2022-07-14 06:09:19,092 INFO L226 Difference]: Without dead ends: 62 [2022-07-14 06:09:19,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:19,093 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 85 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:19,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 34 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:19,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-14 06:09:19,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-14 06:09:19,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 49 states have (on average 1.530612244897959) internal successors, (75), 61 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:19,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-07-14 06:09:19,096 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 10 [2022-07-14 06:09:19,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:19,096 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-07-14 06:09:19,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:19,096 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-07-14 06:09:19,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-14 06:09:19,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:19,097 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:19,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-14 06:09:19,103 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:19,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:19,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-14 06:09:19,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:19,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340044213] [2022-07-14 06:09:19,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:19,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:19,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:19,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:19,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340044213] [2022-07-14 06:09:19,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340044213] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:19,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918178829] [2022-07-14 06:09:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:19,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:19,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:19,211 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:19,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-14 06:09:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:19,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-14 06:09:19,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:19,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:09:19,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:09:19,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:19,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:19,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:19,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918178829] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:19,750 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:19,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2022-07-14 06:09:19,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22418585] [2022-07-14 06:09:19,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:19,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-14 06:09:19,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:19,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-14 06:09:19,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:09:19,755 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:19,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:19,937 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2022-07-14 06:09:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:09:19,937 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-14 06:09:19,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:19,938 INFO L225 Difference]: With dead ends: 143 [2022-07-14 06:09:19,938 INFO L226 Difference]: Without dead ends: 143 [2022-07-14 06:09:19,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:09:19,941 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 277 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:19,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 233 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:19,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-14 06:09:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 57. [2022-07-14 06:09:19,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 45 states have (on average 1.488888888888889) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-14 06:09:19,950 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 11 [2022-07-14 06:09:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:19,951 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-14 06:09:19,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:19,951 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-14 06:09:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:09:19,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:19,952 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:19,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:20,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:20,169 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:20,170 INFO L85 PathProgramCache]: Analyzing trace with hash -464624129, now seen corresponding path program 1 times [2022-07-14 06:09:20,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:20,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628508689] [2022-07-14 06:09:20,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:20,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:20,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:20,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:20,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628508689] [2022-07-14 06:09:20,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628508689] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:20,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:20,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:09:20,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064066207] [2022-07-14 06:09:20,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:20,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:09:20,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:20,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:09:20,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:09:20,273 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-07-14 06:09:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:20,347 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2022-07-14 06:09:20,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:09:20,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 [2022-07-14 06:09:20,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:20,349 INFO L225 Difference]: With dead ends: 81 [2022-07-14 06:09:20,349 INFO L226 Difference]: Without dead ends: 81 [2022-07-14 06:09:20,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:09:20,350 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 230 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:20,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:20,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-14 06:09:20,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 58. [2022-07-14 06:09:20,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.5) internal successors, (69), 57 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:20,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2022-07-14 06:09:20,355 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 12 [2022-07-14 06:09:20,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:20,355 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2022-07-14 06:09:20,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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) [2022-07-14 06:09:20,356 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2022-07-14 06:09:20,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-14 06:09:20,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:20,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:20,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-14 06:09:20,358 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:20,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:20,360 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-14 06:09:20,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:20,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893936097] [2022-07-14 06:09:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:20,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:20,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:20,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893936097] [2022-07-14 06:09:20,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893936097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:20,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:20,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:09:20,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285468047] [2022-07-14 06:09:20,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:20,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:20,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:20,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:20,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:20,444 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2022-07-14 06:09:20,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:20,467 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-14 06:09:20,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:20,468 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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 [2022-07-14 06:09:20,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:20,469 INFO L225 Difference]: With dead ends: 57 [2022-07-14 06:09:20,469 INFO L226 Difference]: Without dead ends: 57 [2022-07-14 06:09:20,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:20,469 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 61 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:20,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 49 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:20,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-14 06:09:20,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-14 06:09:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.4565217391304348) internal successors, (67), 56 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-14 06:09:20,488 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2022-07-14 06:09:20,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:20,488 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-14 06:09:20,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 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) [2022-07-14 06:09:20,488 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-14 06:09:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-14 06:09:20,490 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:20,491 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:20,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-14 06:09:20,491 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:20,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:20,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-14 06:09:20,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:20,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188614359] [2022-07-14 06:09:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:20,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:20,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:20,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:20,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188614359] [2022-07-14 06:09:20,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188614359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:20,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884825084] [2022-07-14 06:09:20,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:20,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:20,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:20,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:20,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-14 06:09:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:20,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-14 06:09:20,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:20,670 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:20,671 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:09:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:20,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:20,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884825084] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:20,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:20,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-14 06:09:20,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95688593] [2022-07-14 06:09:20,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:20,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:09:20,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:20,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:09:20,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:09:20,852 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:23,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:23,331 INFO L93 Difference]: Finished difference Result 115 states and 132 transitions. [2022-07-14 06:09:23,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-14 06:09:23,332 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 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 13 [2022-07-14 06:09:23,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:23,332 INFO L225 Difference]: With dead ends: 115 [2022-07-14 06:09:23,332 INFO L226 Difference]: Without dead ends: 115 [2022-07-14 06:09:23,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:09:23,333 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 180 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:23,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 193 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-14 06:09:23,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-14 06:09:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 54. [2022-07-14 06:09:23,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 53 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:23,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-14 06:09:23,335 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 13 [2022-07-14 06:09:23,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:23,335 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-14 06:09:23,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-14 06:09:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:09:23,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:23,335 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:23,361 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:23,535 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,SelfDestructingSolverStorable11 [2022-07-14 06:09:23,536 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:23,536 INFO L85 PathProgramCache]: Analyzing trace with hash 172811107, now seen corresponding path program 1 times [2022-07-14 06:09:23,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:23,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498113639] [2022-07-14 06:09:23,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:23,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:23,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:23,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498113639] [2022-07-14 06:09:23,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498113639] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:23,581 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:23,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:23,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268956426] [2022-07-14 06:09:23,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:23,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:09:23,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:23,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:09:23,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:23,583 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:23,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:23,625 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2022-07-14 06:09:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:09:23,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 14 [2022-07-14 06:09:23,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:23,626 INFO L225 Difference]: With dead ends: 54 [2022-07-14 06:09:23,626 INFO L226 Difference]: Without dead ends: 54 [2022-07-14 06:09:23,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:09:23,627 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 74 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:23,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 62 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:23,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-14 06:09:23,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2022-07-14 06:09:23,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:23,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-07-14 06:09:23,630 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 14 [2022-07-14 06:09:23,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:23,631 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-07-14 06:09:23,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:23,631 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-07-14 06:09:23,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-14 06:09:23,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:23,632 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:23,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-14 06:09:23,632 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:23,633 INFO L85 PathProgramCache]: Analyzing trace with hash 172811108, now seen corresponding path program 1 times [2022-07-14 06:09:23,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:23,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638731469] [2022-07-14 06:09:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:23,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:23,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:24,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:24,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638731469] [2022-07-14 06:09:24,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638731469] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:24,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:24,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-14 06:09:24,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394247790] [2022-07-14 06:09:24,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:24,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:09:24,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:09:24,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:09:24,401 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:24,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:24,895 INFO L93 Difference]: Finished difference Result 69 states and 81 transitions. [2022-07-14 06:09:24,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-14 06:09:24,896 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 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 14 [2022-07-14 06:09:24,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:24,896 INFO L225 Difference]: With dead ends: 69 [2022-07-14 06:09:24,896 INFO L226 Difference]: Without dead ends: 69 [2022-07-14 06:09:24,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:09:24,897 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 156 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:24,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 75 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:09:24,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-14 06:09:24,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 59. [2022-07-14 06:09:24,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 58 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:24,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2022-07-14 06:09:24,898 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 14 [2022-07-14 06:09:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:24,898 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2022-07-14 06:09:24,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2022-07-14 06:09:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-14 06:09:24,899 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:24,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:24,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-14 06:09:24,899 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1432273078, now seen corresponding path program 1 times [2022-07-14 06:09:24,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:24,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409469916] [2022-07-14 06:09:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:24,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:25,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:25,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:25,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409469916] [2022-07-14 06:09:25,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409469916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:25,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:25,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:09:25,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541395140] [2022-07-14 06:09:25,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:25,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-14 06:09:25,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:25,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-14 06:09:25,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:25,005 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:25,020 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-07-14 06:09:25,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-14 06:09:25,020 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 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 16 [2022-07-14 06:09:25,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:25,021 INFO L225 Difference]: With dead ends: 58 [2022-07-14 06:09:25,021 INFO L226 Difference]: Without dead ends: 55 [2022-07-14 06:09:25,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-14 06:09:25,023 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:25,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 62 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:25,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-14 06:09:25,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-14 06:09:25,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 54 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-07-14 06:09:25,025 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 16 [2022-07-14 06:09:25,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:25,026 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-07-14 06:09:25,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,026 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-07-14 06:09:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:09:25,026 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:25,026 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:25,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-14 06:09:25,027 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:25,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:25,028 INFO L85 PathProgramCache]: Analyzing trace with hash -2001954455, now seen corresponding path program 1 times [2022-07-14 06:09:25,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:25,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459967238] [2022-07-14 06:09:25,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:25,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:25,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:25,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:25,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459967238] [2022-07-14 06:09:25,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459967238] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:25,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:25,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-14 06:09:25,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521781453] [2022-07-14 06:09:25,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:25,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-14 06:09:25,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:25,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-14 06:09:25,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-14 06:09:25,092 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:25,122 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2022-07-14 06:09:25,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-14 06:09:25,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 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 18 [2022-07-14 06:09:25,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:25,123 INFO L225 Difference]: With dead ends: 55 [2022-07-14 06:09:25,123 INFO L226 Difference]: Without dead ends: 55 [2022-07-14 06:09:25,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:09:25,124 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:25,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 54 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-14 06:09:25,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-07-14 06:09:25,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 53 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-07-14 06:09:25,127 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 18 [2022-07-14 06:09:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:25,127 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-07-14 06:09:25,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,127 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-07-14 06:09:25,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:09:25,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:25,128 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:25,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-14 06:09:25,128 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:25,128 INFO L85 PathProgramCache]: Analyzing trace with hash -2001954454, now seen corresponding path program 1 times [2022-07-14 06:09:25,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:25,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383899374] [2022-07-14 06:09:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:25,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:25,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383899374] [2022-07-14 06:09:25,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383899374] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:25,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:25,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:09:25,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723522781] [2022-07-14 06:09:25,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:25,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:09:25,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:25,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:09:25,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:09:25,230 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:25,362 INFO L93 Difference]: Finished difference Result 80 states and 95 transitions. [2022-07-14 06:09:25,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:09:25,362 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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 18 [2022-07-14 06:09:25,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:25,363 INFO L225 Difference]: With dead ends: 80 [2022-07-14 06:09:25,363 INFO L226 Difference]: Without dead ends: 80 [2022-07-14 06:09:25,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:09:25,365 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 208 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:25,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 64 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:25,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-14 06:09:25,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2022-07-14 06:09:25,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.309090909090909) internal successors, (72), 59 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-07-14 06:09:25,367 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 18 [2022-07-14 06:09:25,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:25,369 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-07-14 06:09:25,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,371 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-07-14 06:09:25,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-14 06:09:25,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:25,372 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:25,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-14 06:09:25,372 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:25,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:25,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2001945381, now seen corresponding path program 1 times [2022-07-14 06:09:25,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:25,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112016875] [2022-07-14 06:09:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:25,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:25,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:25,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112016875] [2022-07-14 06:09:25,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112016875] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:25,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:25,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-14 06:09:25,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662120656] [2022-07-14 06:09:25,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:25,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-14 06:09:25,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:25,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-14 06:09:25,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-14 06:09:25,412 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:25,421 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-07-14 06:09:25,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-14 06:09:25,422 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2022-07-14 06:09:25,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:25,423 INFO L225 Difference]: With dead ends: 62 [2022-07-14 06:09:25,423 INFO L226 Difference]: Without dead ends: 62 [2022-07-14 06:09:25,423 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 [2022-07-14 06:09:25,424 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 70 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 [2022-07-14 06:09:25,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 70 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:25,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-14 06:09:25,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-07-14 06:09:25,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.2982456140350878) internal successors, (74), 61 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 74 transitions. [2022-07-14 06:09:25,438 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 74 transitions. Word has length 18 [2022-07-14 06:09:25,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:25,438 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 74 transitions. [2022-07-14 06:09:25,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,439 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 74 transitions. [2022-07-14 06:09:25,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-14 06:09:25,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:25,439 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] [2022-07-14 06:09:25,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-14 06:09:25,440 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash 275803338, now seen corresponding path program 1 times [2022-07-14 06:09:25,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:25,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973566840] [2022-07-14 06:09:25,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:25,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:25,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:25,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973566840] [2022-07-14 06:09:25,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973566840] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:25,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:25,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-14 06:09:25,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304310512] [2022-07-14 06:09:25,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:25,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-14 06:09:25,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:25,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-14 06:09:25,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-14 06:09:25,488 INFO L87 Difference]: Start difference. First operand 62 states and 74 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:25,548 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2022-07-14 06:09:25,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:09:25,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-14 06:09:25,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:25,548 INFO L225 Difference]: With dead ends: 66 [2022-07-14 06:09:25,548 INFO L226 Difference]: Without dead ends: 63 [2022-07-14 06:09:25,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:09:25,549 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:25,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 115 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:25,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-14 06:09:25,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-07-14 06:09:25,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.263157894736842) internal successors, (72), 61 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2022-07-14 06:09:25,551 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 20 [2022-07-14 06:09:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:25,551 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2022-07-14 06:09:25,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:25,551 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2022-07-14 06:09:25,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 06:09:25,552 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:25,552 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:25,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-14 06:09:25,552 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:25,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:25,553 INFO L85 PathProgramCache]: Analyzing trace with hash -309239812, now seen corresponding path program 1 times [2022-07-14 06:09:25,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:25,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305002460] [2022-07-14 06:09:25,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:25,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:25,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:25,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305002460] [2022-07-14 06:09:25,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305002460] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:25,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:25,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-07-14 06:09:25,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444825401] [2022-07-14 06:09:25,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:25,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-14 06:09:25,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-14 06:09:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-14 06:09:25,738 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:26,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:26,001 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2022-07-14 06:09:26,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:09:26,002 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-14 06:09:26,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:26,002 INFO L225 Difference]: With dead ends: 112 [2022-07-14 06:09:26,002 INFO L226 Difference]: Without dead ends: 112 [2022-07-14 06:09:26,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2022-07-14 06:09:26,003 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:26,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 255 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:26,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-14 06:09:26,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2022-07-14 06:09:26,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 80 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:26,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-07-14 06:09:26,005 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 21 [2022-07-14 06:09:26,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:26,005 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-07-14 06:09:26,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:26,005 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-07-14 06:09:26,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-14 06:09:26,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:26,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:26,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-14 06:09:26,005 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:26,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:26,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1998183554, now seen corresponding path program 1 times [2022-07-14 06:09:26,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:26,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311741884] [2022-07-14 06:09:26,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:26,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:26,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:26,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311741884] [2022-07-14 06:09:26,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311741884] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:26,195 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:26,195 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-14 06:09:26,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409481591] [2022-07-14 06:09:26,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:26,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-14 06:09:26,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:26,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-14 06:09:26,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:09:26,198 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:26,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:26,801 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2022-07-14 06:09:26,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:09:26,801 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-14 06:09:26,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:26,802 INFO L225 Difference]: With dead ends: 139 [2022-07-14 06:09:26,802 INFO L226 Difference]: Without dead ends: 139 [2022-07-14 06:09:26,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2022-07-14 06:09:26,802 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 145 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:26,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 251 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:09:26,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-14 06:09:26,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 83. [2022-07-14 06:09:26,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 82 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:26,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2022-07-14 06:09:26,804 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 21 [2022-07-14 06:09:26,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:26,804 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2022-07-14 06:09:26,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:26,804 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2022-07-14 06:09:26,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 06:09:26,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:26,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:26,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-14 06:09:26,805 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:26,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:26,805 INFO L85 PathProgramCache]: Analyzing trace with hash -826750037, now seen corresponding path program 1 times [2022-07-14 06:09:26,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:26,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178859067] [2022-07-14 06:09:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:26,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:26,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:26,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178859067] [2022-07-14 06:09:26,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178859067] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:26,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:26,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-14 06:09:26,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141773761] [2022-07-14 06:09:26,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:26,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-14 06:09:26,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:26,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-14 06:09:26,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-14 06:09:26,893 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:26,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:26,979 INFO L93 Difference]: Finished difference Result 95 states and 108 transitions. [2022-07-14 06:09:26,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-14 06:09:26,980 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 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 23 [2022-07-14 06:09:26,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:26,980 INFO L225 Difference]: With dead ends: 95 [2022-07-14 06:09:26,980 INFO L226 Difference]: Without dead ends: 78 [2022-07-14 06:09:26,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-14 06:09:26,982 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:26,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 173 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:26,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-14 06:09:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-07-14 06:09:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.2191780821917808) internal successors, (89), 77 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2022-07-14 06:09:26,986 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 23 [2022-07-14 06:09:26,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:26,986 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2022-07-14 06:09:26,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2022-07-14 06:09:26,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-14 06:09:26,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:26,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:26,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-14 06:09:26,987 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash -404048211, now seen corresponding path program 1 times [2022-07-14 06:09:26,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:26,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803710409] [2022-07-14 06:09:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:26,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:27,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:27,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:27,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803710409] [2022-07-14 06:09:27,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803710409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:27,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:27,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-14 06:09:27,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020585774] [2022-07-14 06:09:27,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:27,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-14 06:09:27,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:27,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-14 06:09:27,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-14 06:09:27,120 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:27,220 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-07-14 06:09:27,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:09:27,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 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 23 [2022-07-14 06:09:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:27,221 INFO L225 Difference]: With dead ends: 77 [2022-07-14 06:09:27,221 INFO L226 Difference]: Without dead ends: 65 [2022-07-14 06:09:27,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:09:27,222 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 63 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:27,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 152 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:27,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-14 06:09:27,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2022-07-14 06:09:27,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2407407407407407) internal successors, (67), 58 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:27,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2022-07-14 06:09:27,224 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 23 [2022-07-14 06:09:27,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:27,224 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2022-07-14 06:09:27,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:27,224 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2022-07-14 06:09:27,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:09:27,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:27,225 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:27,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-14 06:09:27,225 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:27,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:27,225 INFO L85 PathProgramCache]: Analyzing trace with hash -481506431, now seen corresponding path program 1 times [2022-07-14 06:09:27,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:27,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727498750] [2022-07-14 06:09:27,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:27,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:27,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:27,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727498750] [2022-07-14 06:09:27,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727498750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:27,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:27,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-14 06:09:27,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197543224] [2022-07-14 06:09:27,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:27,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-14 06:09:27,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:27,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-14 06:09:27,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-14 06:09:27,313 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:27,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:27,406 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-07-14 06:09:27,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:09:27,407 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 25 [2022-07-14 06:09:27,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:27,407 INFO L225 Difference]: With dead ends: 67 [2022-07-14 06:09:27,407 INFO L226 Difference]: Without dead ends: 51 [2022-07-14 06:09:27,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-14 06:09:27,408 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:27,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 185 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-14 06:09:27,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-14 06:09:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-07-14 06:09:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 50 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-07-14 06:09:27,410 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 25 [2022-07-14 06:09:27,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:27,410 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-07-14 06:09:27,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:27,410 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-07-14 06:09:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-14 06:09:27,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:27,411 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:27,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-14 06:09:27,412 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash -262651713, now seen corresponding path program 1 times [2022-07-14 06:09:27,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:27,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056607529] [2022-07-14 06:09:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:27,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:27,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:27,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:27,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:27,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056607529] [2022-07-14 06:09:27,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056607529] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-14 06:09:27,536 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-14 06:09:27,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-14 06:09:27,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813033018] [2022-07-14 06:09:27,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-14 06:09:27,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-14 06:09:27,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:27,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-14 06:09:27,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-07-14 06:09:27,537 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:27,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:27,663 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-07-14 06:09:27,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:09:27,663 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 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 25 [2022-07-14 06:09:27,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:27,664 INFO L225 Difference]: With dead ends: 63 [2022-07-14 06:09:27,664 INFO L226 Difference]: Without dead ends: 55 [2022-07-14 06:09:27,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:09:27,664 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:27,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 164 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:27,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-14 06:09:27,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2022-07-14 06:09:27,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 51 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:27,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2022-07-14 06:09:27,666 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 25 [2022-07-14 06:09:27,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:27,666 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2022-07-14 06:09:27,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:27,666 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2022-07-14 06:09:27,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-14 06:09:27,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:27,666 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] [2022-07-14 06:09:27,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-14 06:09:27,666 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:27,667 INFO L85 PathProgramCache]: Analyzing trace with hash 838689666, now seen corresponding path program 1 times [2022-07-14 06:09:27,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:27,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444792657] [2022-07-14 06:09:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:27,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:27,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:27,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:27,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444792657] [2022-07-14 06:09:27,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444792657] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:27,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730533714] [2022-07-14 06:09:27,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:27,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:27,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:27,788 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:27,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-14 06:09:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:27,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-14 06:09:27,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:27,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:28,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:09:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:28,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730533714] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:28,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:28,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-07-14 06:09:28,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303344246] [2022-07-14 06:09:28,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:28,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-14 06:09:28,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:28,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-14 06:09:28,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-14 06:09:28,042 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:28,196 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2022-07-14 06:09:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-14 06:09:28,197 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 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 29 [2022-07-14 06:09:28,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:28,197 INFO L225 Difference]: With dead ends: 73 [2022-07-14 06:09:28,197 INFO L226 Difference]: Without dead ends: 69 [2022-07-14 06:09:28,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:09:28,198 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 333 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:28,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 165 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:28,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-14 06:09:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 48. [2022-07-14 06:09:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-07-14 06:09:28,199 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 29 [2022-07-14 06:09:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:28,200 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-07-14 06:09:28,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:28,200 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-07-14 06:09:28,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-14 06:09:28,200 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:28,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:28,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:28,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:28,407 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:28,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:28,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1473116751, now seen corresponding path program 1 times [2022-07-14 06:09:28,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:28,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355334077] [2022-07-14 06:09:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:28,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:28,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:28,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:28,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355334077] [2022-07-14 06:09:28,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355334077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:28,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14100981] [2022-07-14 06:09:28,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:28,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:28,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:28,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:28,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-14 06:09:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:28,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-14 06:09:28,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:28,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:09:28,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:09:28,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:28,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:28,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14100981] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:28,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:28,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2022-07-14 06:09:28,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000044953] [2022-07-14 06:09:28,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:28,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-14 06:09:28,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:28,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-14 06:09:28,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-14 06:09:28,844 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 17 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:29,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:29,037 INFO L93 Difference]: Finished difference Result 86 states and 96 transitions. [2022-07-14 06:09:29,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-14 06:09:29,037 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 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 31 [2022-07-14 06:09:29,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:29,037 INFO L225 Difference]: With dead ends: 86 [2022-07-14 06:09:29,038 INFO L226 Difference]: Without dead ends: 86 [2022-07-14 06:09:29,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:09:29,038 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 280 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:29,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 117 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:29,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-14 06:09:29,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-07-14 06:09:29,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 58 states have (on average 1.206896551724138) internal successors, (70), 60 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2022-07-14 06:09:29,040 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 31 [2022-07-14 06:09:29,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:29,040 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2022-07-14 06:09:29,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.75) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:29,040 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2022-07-14 06:09:29,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-14 06:09:29,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:29,040 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] [2022-07-14 06:09:29,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:29,240 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,SelfDestructingSolverStorable26 [2022-07-14 06:09:29,241 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:29,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:29,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1707334280, now seen corresponding path program 1 times [2022-07-14 06:09:29,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:29,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574692183] [2022-07-14 06:09:29,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:29,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:29,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:29,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:29,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574692183] [2022-07-14 06:09:29,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574692183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:29,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803255959] [2022-07-14 06:09:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:29,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:29,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:29,321 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:29,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-14 06:09:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:29,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-14 06:09:29,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:29,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:09:29,398 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:09:29,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:29,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:29,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:29,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:29,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803255959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:29,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:29,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-07-14 06:09:29,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411865996] [2022-07-14 06:09:29,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:29,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:09:29,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:29,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:09:29,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:09:29,690 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:30,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:30,000 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2022-07-14 06:09:30,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:09:30,001 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-14 06:09:30,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:30,001 INFO L225 Difference]: With dead ends: 80 [2022-07-14 06:09:30,001 INFO L226 Difference]: Without dead ends: 80 [2022-07-14 06:09:30,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=188, Invalid=682, Unknown=0, NotChecked=0, Total=870 [2022-07-14 06:09:30,002 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 234 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:30,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 153 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:30,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-14 06:09:30,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 65. [2022-07-14 06:09:30,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 62 states have (on average 1.1935483870967742) internal successors, (74), 64 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2022-07-14 06:09:30,004 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 33 [2022-07-14 06:09:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:30,004 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2022-07-14 06:09:30,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.7368421052631575) internal successors, (90), 20 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:30,004 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2022-07-14 06:09:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-14 06:09:30,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:30,004 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:30,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:30,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-14 06:09:30,205 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:30,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:30,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2102124002, now seen corresponding path program 2 times [2022-07-14 06:09:30,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:30,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497682249] [2022-07-14 06:09:30,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:30,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:30,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:30,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497682249] [2022-07-14 06:09:30,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497682249] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:30,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206822348] [2022-07-14 06:09:30,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:09:30,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:30,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:30,364 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:30,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-14 06:09:30,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:09:30,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:30,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-14 06:09:30,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:30,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:09:30,759 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:30,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 06:09:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:30,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:31,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:09:31,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:09:31,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:09:31,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:31,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206822348] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:31,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:31,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2022-07-14 06:09:31,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298406488] [2022-07-14 06:09:31,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:31,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-14 06:09:31,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:31,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-14 06:09:31,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:09:31,313 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:31,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:31,662 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-07-14 06:09:31,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:09:31,662 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 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 36 [2022-07-14 06:09:31,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:31,664 INFO L225 Difference]: With dead ends: 93 [2022-07-14 06:09:31,664 INFO L226 Difference]: Without dead ends: 90 [2022-07-14 06:09:31,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=205, Invalid=1687, Unknown=0, NotChecked=0, Total=1892 [2022-07-14 06:09:31,665 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 100 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:31,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 303 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 118 Unchecked, 0.1s Time] [2022-07-14 06:09:31,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-14 06:09:31,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2022-07-14 06:09:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 1.1728395061728396) internal successors, (95), 83 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-07-14 06:09:31,667 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 36 [2022-07-14 06:09:31,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:31,668 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-07-14 06:09:31,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6363636363636362) internal successors, (87), 33 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:31,668 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-07-14 06:09:31,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-14 06:09:31,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:31,668 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-14 06:09:31,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:31,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-14 06:09:31,886 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:31,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:31,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1563569052, now seen corresponding path program 1 times [2022-07-14 06:09:31,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:31,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698333788] [2022-07-14 06:09:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:31,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:31,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:31,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698333788] [2022-07-14 06:09:31,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698333788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:31,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934571941] [2022-07-14 06:09:31,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:31,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:31,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:31,959 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:31,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-14 06:09:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:32,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-14 06:09:32,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:32,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:09:32,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:09:32,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:32,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:32,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:32,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934571941] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:32,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:32,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2022-07-14 06:09:32,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000455214] [2022-07-14 06:09:32,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:32,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-14 06:09:32,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:32,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-14 06:09:32,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-07-14 06:09:32,303 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:32,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:32,652 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2022-07-14 06:09:32,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:09:32,653 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 20 states have internal predecessors, (94), 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 37 [2022-07-14 06:09:32,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:32,653 INFO L225 Difference]: With dead ends: 114 [2022-07-14 06:09:32,653 INFO L226 Difference]: Without dead ends: 114 [2022-07-14 06:09:32,654 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=232, Invalid=824, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:09:32,654 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 390 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:32,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 117 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:09:32,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-14 06:09:32,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 84. [2022-07-14 06:09:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 83 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-07-14 06:09:32,656 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 37 [2022-07-14 06:09:32,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:32,656 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-07-14 06:09:32,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 4.947368421052632) internal successors, (94), 20 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:32,656 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-07-14 06:09:32,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-14 06:09:32,656 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:32,657 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-14 06:09:32,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:32,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:32,867 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:32,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:32,868 INFO L85 PathProgramCache]: Analyzing trace with hash 2117126329, now seen corresponding path program 2 times [2022-07-14 06:09:32,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:32,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745277999] [2022-07-14 06:09:32,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:32,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:33,121 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:33,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:33,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745277999] [2022-07-14 06:09:33,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745277999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:33,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244395913] [2022-07-14 06:09:33,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:09:33,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:33,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:33,128 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:33,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-14 06:09:33,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:09:33,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:33,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-14 06:09:33,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:33,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:33,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:09:33,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:09:33,447 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:33,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2022-07-14 06:09:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:33,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:33,506 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_390 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_390) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 1)) 0)) is different from false [2022-07-14 06:09:33,528 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:33,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:09:33,532 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:33,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:09:33,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:09:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:33,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244395913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:33,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:33,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 30 [2022-07-14 06:09:33,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090071795] [2022-07-14 06:09:33,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:33,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-14 06:09:33,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-14 06:09:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=718, Unknown=1, NotChecked=54, Total=870 [2022-07-14 06:09:33,656 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:33,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:33,834 INFO L93 Difference]: Finished difference Result 146 states and 161 transitions. [2022-07-14 06:09:33,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:09:33,834 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 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 42 [2022-07-14 06:09:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:33,835 INFO L225 Difference]: With dead ends: 146 [2022-07-14 06:09:33,835 INFO L226 Difference]: Without dead ends: 130 [2022-07-14 06:09:33,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=922, Unknown=1, NotChecked=62, Total=1122 [2022-07-14 06:09:33,835 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 106 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:33,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 254 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2022-07-14 06:09:33,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-14 06:09:33,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-07-14 06:09:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 122 states have (on average 1.139344262295082) internal successors, (139), 124 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:33,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 139 transitions. [2022-07-14 06:09:33,837 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 139 transitions. Word has length 42 [2022-07-14 06:09:33,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:33,838 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 139 transitions. [2022-07-14 06:09:33,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.1666666666666665) internal successors, (95), 30 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:33,838 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 139 transitions. [2022-07-14 06:09:33,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-14 06:09:33,838 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:33,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2022-07-14 06:09:33,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-14 06:09:34,044 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,SelfDestructingSolverStorable30 [2022-07-14 06:09:34,044 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:34,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1160738303, now seen corresponding path program 2 times [2022-07-14 06:09:34,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:34,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571252296] [2022-07-14 06:09:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:34,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:34,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571252296] [2022-07-14 06:09:34,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571252296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:34,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807365062] [2022-07-14 06:09:34,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:09:34,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:34,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:34,417 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:34,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-14 06:09:34,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:09:34,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:34,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-14 06:09:34,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:34,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:09:34,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:09:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:34,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:34,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:09:34,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:09:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:34,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807365062] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:34,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:34,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 32 [2022-07-14 06:09:34,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073093653] [2022-07-14 06:09:34,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:34,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-14 06:09:34,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:34,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-14 06:09:34,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:09:34,931 INFO L87 Difference]: Start difference. First operand 125 states and 139 transitions. Second operand has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:36,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:36,337 INFO L93 Difference]: Finished difference Result 218 states and 234 transitions. [2022-07-14 06:09:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-14 06:09:36,341 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 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 44 [2022-07-14 06:09:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:36,341 INFO L225 Difference]: With dead ends: 218 [2022-07-14 06:09:36,341 INFO L226 Difference]: Without dead ends: 193 [2022-07-14 06:09:36,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 72 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=428, Invalid=2434, Unknown=0, NotChecked=0, Total=2862 [2022-07-14 06:09:36,342 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 375 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:36,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 566 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 604 Invalid, 0 Unknown, 142 Unchecked, 0.3s Time] [2022-07-14 06:09:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-14 06:09:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 145. [2022-07-14 06:09:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 144 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2022-07-14 06:09:36,345 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 44 [2022-07-14 06:09:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:36,345 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2022-07-14 06:09:36,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.75) internal successors, (88), 32 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:36,345 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2022-07-14 06:09:36,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-14 06:09:36,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:36,345 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] [2022-07-14 06:09:36,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-14 06:09:36,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:36,563 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:36,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:36,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1310015382, now seen corresponding path program 3 times [2022-07-14 06:09:36,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:36,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450809005] [2022-07-14 06:09:36,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:36,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:36,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:36,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450809005] [2022-07-14 06:09:36,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450809005] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:36,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213841857] [2022-07-14 06:09:36,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:09:36,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:36,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:36,668 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:36,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-14 06:09:36,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:09:36,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:36,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-14 06:09:36,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:36,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:09:36,785 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:09:36,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:37,086 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:37,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:37,417 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:37,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213841857] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:37,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:37,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2022-07-14 06:09:37,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31429349] [2022-07-14 06:09:37,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:37,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-14 06:09:37,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:37,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-14 06:09:37,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-07-14 06:09:37,421 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand has 25 states, 24 states have (on average 5.416666666666667) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:37,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:37,821 INFO L93 Difference]: Finished difference Result 203 states and 219 transitions. [2022-07-14 06:09:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:09:37,822 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.416666666666667) internal successors, (130), 25 states have internal predecessors, (130), 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 46 [2022-07-14 06:09:37,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:37,823 INFO L225 Difference]: With dead ends: 203 [2022-07-14 06:09:37,823 INFO L226 Difference]: Without dead ends: 203 [2022-07-14 06:09:37,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:09:37,823 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 518 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:37,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 240 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:09:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-14 06:09:37,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 164. [2022-07-14 06:09:37,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 161 states have (on average 1.1428571428571428) internal successors, (184), 163 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:37,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2022-07-14 06:09:37,826 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 46 [2022-07-14 06:09:37,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:37,826 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2022-07-14 06:09:37,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.416666666666667) internal successors, (130), 25 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2022-07-14 06:09:37,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 06:09:37,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:37,826 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:37,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:38,039 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,SelfDestructingSolverStorable32 [2022-07-14 06:09:38,039 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:38,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:38,040 INFO L85 PathProgramCache]: Analyzing trace with hash -204836258, now seen corresponding path program 3 times [2022-07-14 06:09:38,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:38,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188088575] [2022-07-14 06:09:38,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:38,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:38,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:38,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:38,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188088575] [2022-07-14 06:09:38,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188088575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:38,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873547912] [2022-07-14 06:09:38,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:09:38,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:38,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:38,371 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:38,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-14 06:09:38,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:09:38,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:38,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 06:09:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:38,535 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:38,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:09:38,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:09:38,994 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:09:38,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-07-14 06:09:39,031 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:39,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:39,340 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (|v_ULTIMATE.start_substring_~ps2~0#1.offset_36| Int) (v_ArrVal_494 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.offset| Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_494))) (let ((.cse1 (select (select .cse0 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps2~0#1.offset_36|) (not (= (select (select .cse0 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps2~0#1.offset_36| 1)) .cse1)) (= .cse1 0) (not (<= 0 |v_ULTIMATE.start_substring_~ps2~0#1.offset_36|)))))) is different from false [2022-07-14 06:09:39,354 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:39,355 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-07-14 06:09:39,369 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:39,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 111 treesize of output 120 [2022-07-14 06:09:39,378 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:39,379 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 64 [2022-07-14 06:09:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:39,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873547912] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:39,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:39,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 44 [2022-07-14 06:09:39,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802511522] [2022-07-14 06:09:39,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:39,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-14 06:09:39,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:39,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-14 06:09:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1654, Unknown=1, NotChecked=82, Total=1892 [2022-07-14 06:09:39,796 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:40,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:40,327 INFO L93 Difference]: Finished difference Result 159 states and 176 transitions. [2022-07-14 06:09:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-14 06:09:40,328 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 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 48 [2022-07-14 06:09:40,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:40,328 INFO L225 Difference]: With dead ends: 159 [2022-07-14 06:09:40,329 INFO L226 Difference]: Without dead ends: 126 [2022-07-14 06:09:40,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=362, Invalid=2833, Unknown=1, NotChecked=110, Total=3306 [2022-07-14 06:09:40,330 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 119 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:40,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 633 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 515 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2022-07-14 06:09:40,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-14 06:09:40,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2022-07-14 06:09:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 120 states have (on average 1.1583333333333334) internal successors, (139), 122 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:40,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 139 transitions. [2022-07-14 06:09:40,332 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 139 transitions. Word has length 48 [2022-07-14 06:09:40,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:40,332 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 139 transitions. [2022-07-14 06:09:40,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 44 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:40,332 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 139 transitions. [2022-07-14 06:09:40,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-14 06:09:40,333 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:40,333 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:40,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:40,550 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,SelfDestructingSolverStorable33 [2022-07-14 06:09:40,550 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:40,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:40,550 INFO L85 PathProgramCache]: Analyzing trace with hash 532688685, now seen corresponding path program 1 times [2022-07-14 06:09:40,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:40,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4177611] [2022-07-14 06:09:40,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:40,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:40,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:40,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4177611] [2022-07-14 06:09:40,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4177611] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:40,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579660758] [2022-07-14 06:09:40,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:40,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:40,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:40,645 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:40,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-14 06:09:40,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:40,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-14 06:09:40,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:40,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:09:40,758 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:09:40,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:40,943 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:40,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:41,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579660758] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:41,164 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:41,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-07-14 06:09:41,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458629277] [2022-07-14 06:09:41,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:41,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-14 06:09:41,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:41,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-14 06:09:41,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-07-14 06:09:41,165 INFO L87 Difference]: Start difference. First operand 123 states and 139 transitions. Second operand has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:41,763 INFO L93 Difference]: Finished difference Result 152 states and 165 transitions. [2022-07-14 06:09:41,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:09:41,763 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 25 states have internal predecessors, (127), 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 48 [2022-07-14 06:09:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:41,764 INFO L225 Difference]: With dead ends: 152 [2022-07-14 06:09:41,764 INFO L226 Difference]: Without dead ends: 152 [2022-07-14 06:09:41,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=317, Invalid=1165, Unknown=0, NotChecked=0, Total=1482 [2022-07-14 06:09:41,765 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 548 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 548 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:41,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [548 Valid, 197 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:09:41,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-07-14 06:09:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 127. [2022-07-14 06:09:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 124 states have (on average 1.153225806451613) internal successors, (143), 126 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:41,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 143 transitions. [2022-07-14 06:09:41,767 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 143 transitions. Word has length 48 [2022-07-14 06:09:41,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:41,767 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 143 transitions. [2022-07-14 06:09:41,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 5.291666666666667) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:41,767 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 143 transitions. [2022-07-14 06:09:41,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-14 06:09:41,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:41,767 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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] [2022-07-14 06:09:41,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:41,975 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,SelfDestructingSolverStorable34 [2022-07-14 06:09:41,975 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:41,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash -575516839, now seen corresponding path program 1 times [2022-07-14 06:09:41,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:41,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168796336] [2022-07-14 06:09:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:41,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:42,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:42,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168796336] [2022-07-14 06:09:42,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168796336] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:42,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704412248] [2022-07-14 06:09:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:42,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:42,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:42,372 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:42,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-14 06:09:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:42,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-14 06:09:42,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:42,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:09:42,769 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:42,769 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2022-07-14 06:09:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:09:42,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:43,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:09:43,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:09:43,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-07-14 06:09:43,249 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:09:43,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704412248] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:43,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:43,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12, 12] total 42 [2022-07-14 06:09:43,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492891122] [2022-07-14 06:09:43,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:43,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:09:43,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:09:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1597, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 06:09:43,251 INFO L87 Difference]: Start difference. First operand 127 states and 143 transitions. Second operand has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:44,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:44,241 INFO L93 Difference]: Finished difference Result 251 states and 276 transitions. [2022-07-14 06:09:44,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-14 06:09:44,242 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-07-14 06:09:44,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:44,242 INFO L225 Difference]: With dead ends: 251 [2022-07-14 06:09:44,242 INFO L226 Difference]: Without dead ends: 251 [2022-07-14 06:09:44,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=457, Invalid=4513, Unknown=0, NotChecked=0, Total=4970 [2022-07-14 06:09:44,244 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 174 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:44,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 590 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 944 Invalid, 0 Unknown, 316 Unchecked, 0.3s Time] [2022-07-14 06:09:44,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-07-14 06:09:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 212. [2022-07-14 06:09:44,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 209 states have (on average 1.1291866028708133) internal successors, (236), 211 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:44,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 236 transitions. [2022-07-14 06:09:44,246 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 236 transitions. Word has length 51 [2022-07-14 06:09:44,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:44,247 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 236 transitions. [2022-07-14 06:09:44,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 42 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:44,247 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 236 transitions. [2022-07-14 06:09:44,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-14 06:09:44,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:44,247 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:44,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:44,447 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,SelfDestructingSolverStorable35 [2022-07-14 06:09:44,448 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:44,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:44,448 INFO L85 PathProgramCache]: Analyzing trace with hash 314543995, now seen corresponding path program 4 times [2022-07-14 06:09:44,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:44,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599674428] [2022-07-14 06:09:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:44,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:44,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:44,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599674428] [2022-07-14 06:09:44,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599674428] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:44,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410074292] [2022-07-14 06:09:44,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:09:44,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:44,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:44,542 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) [2022-07-14 06:09:44,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-14 06:09:44,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:09:44,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:44,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-14 06:09:44,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:44,652 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:44,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:09:44,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:44,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:09:44,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-14 06:09:45,138 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-14 06:09:45,138 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 51 [2022-07-14 06:09:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:45,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:45,631 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (v_ArrVal_604 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.offset| Int) (|v_ULTIMATE.start_substring_~ps2~0#1.offset_52| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_604))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (not (<= 0 |v_ULTIMATE.start_substring_~ps2~0#1.offset_52|)) (<= (+ |v_ULTIMATE.start_substring_~ps2~0#1.offset_52| 3) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps2~0#1.offset_52| 1)))) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps2~0#1.offset_52|) (= .cse0 0))))) is different from false [2022-07-14 06:09:45,640 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:45,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-07-14 06:09:45,652 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:45,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 111 treesize of output 120 [2022-07-14 06:09:45,659 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:45,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 64 [2022-07-14 06:09:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:09:46,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410074292] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:46,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:46,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17, 17] total 41 [2022-07-14 06:09:46,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907700512] [2022-07-14 06:09:46,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:46,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:09:46,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:46,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:09:46,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1479, Unknown=1, NotChecked=78, Total=1722 [2022-07-14 06:09:46,310 INFO L87 Difference]: Start difference. First operand 212 states and 236 transitions. Second operand has 42 states, 41 states have (on average 3.024390243902439) internal successors, (124), 42 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:47,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:47,815 INFO L93 Difference]: Finished difference Result 238 states and 264 transitions. [2022-07-14 06:09:47,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:09:47,822 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.024390243902439) internal successors, (124), 42 states have internal predecessors, (124), 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 52 [2022-07-14 06:09:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:47,822 INFO L225 Difference]: With dead ends: 238 [2022-07-14 06:09:47,822 INFO L226 Difference]: Without dead ends: 238 [2022-07-14 06:09:47,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=759, Invalid=3276, Unknown=1, NotChecked=124, Total=4160 [2022-07-14 06:09:47,824 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 432 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 328 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:47,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 328 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 503 Invalid, 0 Unknown, 328 Unchecked, 0.2s Time] [2022-07-14 06:09:47,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-14 06:09:47,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 223. [2022-07-14 06:09:47,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 220 states have (on average 1.1318181818181818) internal successors, (249), 222 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:47,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 249 transitions. [2022-07-14 06:09:47,827 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 249 transitions. Word has length 52 [2022-07-14 06:09:47,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:47,827 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 249 transitions. [2022-07-14 06:09:47,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.024390243902439) internal successors, (124), 42 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:47,827 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 249 transitions. [2022-07-14 06:09:47,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-14 06:09:47,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:47,828 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:47,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:48,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:48,055 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:48,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1038457781, now seen corresponding path program 3 times [2022-07-14 06:09:48,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:48,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506476080] [2022-07-14 06:09:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:48,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 38 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:48,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506476080] [2022-07-14 06:09:48,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506476080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:48,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842303667] [2022-07-14 06:09:48,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:09:48,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:48,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:48,248 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:48,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-14 06:09:48,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-14 06:09:48,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:48,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-14 06:09:48,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:48,638 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:48,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:48,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-14 06:09:48,884 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:48,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842303667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:48,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:48,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-07-14 06:09:48,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607807601] [2022-07-14 06:09:48,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:48,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-14 06:09:48,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:48,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-14 06:09:48,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:09:48,885 INFO L87 Difference]: Start difference. First operand 223 states and 249 transitions. Second operand has 31 states, 30 states have (on average 4.133333333333334) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:49,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:49,337 INFO L93 Difference]: Finished difference Result 467 states and 523 transitions. [2022-07-14 06:09:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:09:49,337 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.133333333333334) internal successors, (124), 31 states have internal predecessors, (124), 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 55 [2022-07-14 06:09:49,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:49,338 INFO L225 Difference]: With dead ends: 467 [2022-07-14 06:09:49,338 INFO L226 Difference]: Without dead ends: 467 [2022-07-14 06:09:49,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2022-07-14 06:09:49,339 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 583 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:49,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 411 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:09:49,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-07-14 06:09:49,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 292. [2022-07-14 06:09:49,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 289 states have (on average 1.1522491349480968) internal successors, (333), 291 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:49,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 333 transitions. [2022-07-14 06:09:49,343 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 333 transitions. Word has length 55 [2022-07-14 06:09:49,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:49,344 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 333 transitions. [2022-07-14 06:09:49,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.133333333333334) internal successors, (124), 31 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 333 transitions. [2022-07-14 06:09:49,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-14 06:09:49,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:49,345 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:49,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:49,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-14 06:09:49,556 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:49,556 INFO L85 PathProgramCache]: Analyzing trace with hash -869737036, now seen corresponding path program 4 times [2022-07-14 06:09:49,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:49,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305828396] [2022-07-14 06:09:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:49,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 21 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:50,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:50,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305828396] [2022-07-14 06:09:50,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305828396] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:50,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868621088] [2022-07-14 06:09:50,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:09:50,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:50,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:50,088 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:50,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-14 06:09:50,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:09:50,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:50,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-14 06:09:50,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:50,184 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:50,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:09:50,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:09:50,548 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:50,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-14 06:09:50,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-07-14 06:09:52,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:09:52,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 11 [2022-07-14 06:09:52,369 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:09:52,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2022-07-14 06:09:52,371 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:52,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:52,655 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:52,656 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 22 [2022-07-14 06:09:52,660 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:52,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2022-07-14 06:09:52,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-07-14 06:09:53,042 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 31 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:09:53,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868621088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:53,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:53,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 16] total 48 [2022-07-14 06:09:53,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588593158] [2022-07-14 06:09:53,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:53,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-14 06:09:53,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:53,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-14 06:09:53,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2053, Unknown=21, NotChecked=0, Total=2256 [2022-07-14 06:09:53,053 INFO L87 Difference]: Start difference. First operand 292 states and 333 transitions. Second operand has 48 states, 48 states have (on average 2.9375) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:54,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:54,044 INFO L93 Difference]: Finished difference Result 315 states and 356 transitions. [2022-07-14 06:09:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:09:54,044 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9375) internal successors, (141), 48 states have internal predecessors, (141), 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 57 [2022-07-14 06:09:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:54,045 INFO L225 Difference]: With dead ends: 315 [2022-07-14 06:09:54,045 INFO L226 Difference]: Without dead ends: 277 [2022-07-14 06:09:54,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=458, Invalid=4351, Unknown=21, NotChecked=0, Total=4830 [2022-07-14 06:09:54,046 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 150 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:54,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 401 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 396 Invalid, 0 Unknown, 144 Unchecked, 0.1s Time] [2022-07-14 06:09:54,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-07-14 06:09:54,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 262. [2022-07-14 06:09:54,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 259 states have (on average 1.162162162162162) internal successors, (301), 261 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:54,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 301 transitions. [2022-07-14 06:09:54,049 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 301 transitions. Word has length 57 [2022-07-14 06:09:54,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:54,050 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 301 transitions. [2022-07-14 06:09:54,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9375) internal successors, (141), 48 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:54,050 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 301 transitions. [2022-07-14 06:09:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-14 06:09:54,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:54,050 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 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] [2022-07-14 06:09:54,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:54,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-14 06:09:54,271 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:54,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:54,271 INFO L85 PathProgramCache]: Analyzing trace with hash 421187170, now seen corresponding path program 2 times [2022-07-14 06:09:54,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:54,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595100573] [2022-07-14 06:09:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:54,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:54,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:54,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595100573] [2022-07-14 06:09:54,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595100573] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:54,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159521731] [2022-07-14 06:09:54,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:09:54,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:54,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:54,650 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:54,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-14 06:09:54,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:09:54,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:54,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-14 06:09:54,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:54,841 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:09:55,085 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-14 06:09:55,086 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-14 06:09:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:09:55,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:55,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:09:55,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:09:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-14 06:09:55,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159521731] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:55,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:55,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 14, 14] total 41 [2022-07-14 06:09:55,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876147959] [2022-07-14 06:09:55,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:55,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:09:55,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:55,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:09:55,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1533, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:09:55,300 INFO L87 Difference]: Start difference. First operand 262 states and 301 transitions. Second operand has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:56,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:56,918 INFO L93 Difference]: Finished difference Result 462 states and 517 transitions. [2022-07-14 06:09:56,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-14 06:09:56,918 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 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 59 [2022-07-14 06:09:56,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:56,919 INFO L225 Difference]: With dead ends: 462 [2022-07-14 06:09:56,919 INFO L226 Difference]: Without dead ends: 456 [2022-07-14 06:09:56,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 100 SyntacticMatches, 6 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=499, Invalid=6307, Unknown=0, NotChecked=0, Total=6806 [2022-07-14 06:09:56,921 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 136 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 1481 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 1658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:56,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 930 Invalid, 1658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1481 Invalid, 0 Unknown, 143 Unchecked, 0.5s Time] [2022-07-14 06:09:56,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-07-14 06:09:56,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 365. [2022-07-14 06:09:56,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 362 states have (on average 1.1519337016574585) internal successors, (417), 364 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:56,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 417 transitions. [2022-07-14 06:09:56,925 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 417 transitions. Word has length 59 [2022-07-14 06:09:56,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:56,925 INFO L495 AbstractCegarLoop]: Abstraction has 365 states and 417 transitions. [2022-07-14 06:09:56,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.341463414634146) internal successors, (137), 41 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:56,925 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 417 transitions. [2022-07-14 06:09:56,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-14 06:09:56,925 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:56,926 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:56,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:57,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-14 06:09:57,126 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:57,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:57,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1826839330, now seen corresponding path program 3 times [2022-07-14 06:09:57,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:57,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098932665] [2022-07-14 06:09:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:57,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 1 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:09:57,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:57,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098932665] [2022-07-14 06:09:57,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098932665] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:57,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015209096] [2022-07-14 06:09:57,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:09:57,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:57,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:57,236 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:57,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-14 06:09:57,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:09:57,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:57,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:09:57,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:57,336 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:09:57,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:09:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-14 06:09:57,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:57,737 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-14 06:09:57,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015209096] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:57,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:57,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 28 [2022-07-14 06:09:57,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796071462] [2022-07-14 06:09:57,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:57,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-14 06:09:57,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:57,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-14 06:09:57,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:09:57,738 INFO L87 Difference]: Start difference. First operand 365 states and 417 transitions. Second operand has 28 states, 28 states have (on average 5.25) internal successors, (147), 28 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:09:58,882 INFO L93 Difference]: Finished difference Result 581 states and 650 transitions. [2022-07-14 06:09:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-14 06:09:58,883 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.25) internal successors, (147), 28 states have internal predecessors, (147), 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 59 [2022-07-14 06:09:58,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:09:58,884 INFO L225 Difference]: With dead ends: 581 [2022-07-14 06:09:58,884 INFO L226 Difference]: Without dead ends: 579 [2022-07-14 06:09:58,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=709, Invalid=2831, Unknown=0, NotChecked=0, Total=3540 [2022-07-14 06:09:58,885 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 555 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 1259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:09:58,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 506 Invalid, 1259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:09:58,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-07-14 06:09:58,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 426. [2022-07-14 06:09:58,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 423 states have (on average 1.1442080378250592) internal successors, (484), 425 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:58,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 484 transitions. [2022-07-14 06:09:58,891 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 484 transitions. Word has length 59 [2022-07-14 06:09:58,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:09:58,891 INFO L495 AbstractCegarLoop]: Abstraction has 426 states and 484 transitions. [2022-07-14 06:09:58,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.25) internal successors, (147), 28 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:09:58,891 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 484 transitions. [2022-07-14 06:09:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-14 06:09:58,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:09:58,892 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:09:58,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-14 06:09:59,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:59,103 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:09:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:09:59,104 INFO L85 PathProgramCache]: Analyzing trace with hash 723375223, now seen corresponding path program 5 times [2022-07-14 06:09:59,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:09:59,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542500539] [2022-07-14 06:09:59,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:09:59,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:09:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:09:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:59,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:09:59,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542500539] [2022-07-14 06:09:59,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542500539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:09:59,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173486396] [2022-07-14 06:09:59,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:09:59,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:09:59,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:09:59,394 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:09:59,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-14 06:09:59,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-14 06:09:59,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:09:59,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-14 06:09:59,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:09:59,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:09:59,651 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:09:59,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:09:59,801 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:59,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2022-07-14 06:09:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:59,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:09:59,856 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_787) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:09:59,859 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:59,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:09:59,863 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:09:59,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:09:59,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:09:59,974 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:09:59,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173486396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:09:59,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:09:59,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 35 [2022-07-14 06:09:59,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660946891] [2022-07-14 06:09:59,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:09:59,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-14 06:09:59,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:09:59,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-14 06:09:59,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1022, Unknown=1, NotChecked=64, Total=1190 [2022-07-14 06:09:59,976 INFO L87 Difference]: Start difference. First operand 426 states and 484 transitions. Second operand has 35 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 35 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:00,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:00,217 INFO L93 Difference]: Finished difference Result 474 states and 529 transitions. [2022-07-14 06:10:00,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:10:00,218 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 35 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-14 06:10:00,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:00,219 INFO L225 Difference]: With dead ends: 474 [2022-07-14 06:10:00,219 INFO L226 Difference]: Without dead ends: 426 [2022-07-14 06:10:00,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=1340, Unknown=1, NotChecked=74, Total=1560 [2022-07-14 06:10:00,220 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 93 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:00,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 590 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 642 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-07-14 06:10:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-07-14 06:10:00,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 400. [2022-07-14 06:10:00,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 397 states have (on average 1.1360201511335013) internal successors, (451), 399 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 451 transitions. [2022-07-14 06:10:00,224 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 451 transitions. Word has length 61 [2022-07-14 06:10:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:00,225 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 451 transitions. [2022-07-14 06:10:00,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.6857142857142855) internal successors, (129), 35 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:00,225 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 451 transitions. [2022-07-14 06:10:00,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-14 06:10:00,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:00,225 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:00,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-14 06:10:00,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:00,445 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1359597257, now seen corresponding path program 6 times [2022-07-14 06:10:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:00,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151528394] [2022-07-14 06:10:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:00,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:00,548 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 1 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:00,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:00,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151528394] [2022-07-14 06:10:00,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151528394] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:00,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617921975] [2022-07-14 06:10:00,549 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:10:00,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:00,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:00,564 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:00,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-14 06:10:00,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-14 06:10:00,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:00,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-14 06:10:00,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:00,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:01,036 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-14 06:10:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:01,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617921975] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:01,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:01,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-07-14 06:10:01,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171194710] [2022-07-14 06:10:01,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:01,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-14 06:10:01,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:01,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-14 06:10:01,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-07-14 06:10:01,064 INFO L87 Difference]: Start difference. First operand 400 states and 451 transitions. Second operand has 29 states, 28 states have (on average 5.535714285714286) internal successors, (155), 29 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:01,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:01,472 INFO L93 Difference]: Finished difference Result 637 states and 716 transitions. [2022-07-14 06:10:01,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-14 06:10:01,472 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 5.535714285714286) internal successors, (155), 29 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-07-14 06:10:01,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:01,473 INFO L225 Difference]: With dead ends: 637 [2022-07-14 06:10:01,473 INFO L226 Difference]: Without dead ends: 637 [2022-07-14 06:10:01,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=346, Invalid=1214, Unknown=0, NotChecked=0, Total=1560 [2022-07-14 06:10:01,476 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 724 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:01,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 327 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:10:01,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-07-14 06:10:01,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 506. [2022-07-14 06:10:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 503 states have (on average 1.1451292246520874) internal successors, (576), 505 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 576 transitions. [2022-07-14 06:10:01,495 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 576 transitions. Word has length 61 [2022-07-14 06:10:01,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:01,496 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 576 transitions. [2022-07-14 06:10:01,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 5.535714285714286) internal successors, (155), 29 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:01,497 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 576 transitions. [2022-07-14 06:10:01,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 06:10:01,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:01,497 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 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] [2022-07-14 06:10:01,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:01,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-07-14 06:10:01,698 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:01,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:01,698 INFO L85 PathProgramCache]: Analyzing trace with hash 123652268, now seen corresponding path program 2 times [2022-07-14 06:10:01,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:01,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089848806] [2022-07-14 06:10:01,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:01,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:01,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:01,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:01,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089848806] [2022-07-14 06:10:01,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089848806] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:01,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101566739] [2022-07-14 06:10:01,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:01,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:01,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:01,792 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:01,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-14 06:10:01,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:01,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:01,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-14 06:10:01,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:02,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:02,171 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:10:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:02,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101566739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:02,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:02,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 22 [2022-07-14 06:10:02,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755415121] [2022-07-14 06:10:02,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:02,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-14 06:10:02,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:02,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-14 06:10:02,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-07-14 06:10:02,189 INFO L87 Difference]: Start difference. First operand 506 states and 576 transitions. Second operand has 23 states, 22 states have (on average 5.454545454545454) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:02,434 INFO L93 Difference]: Finished difference Result 641 states and 718 transitions. [2022-07-14 06:10:02,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-14 06:10:02,434 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 5.454545454545454) internal successors, (120), 23 states have internal predecessors, (120), 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 62 [2022-07-14 06:10:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:02,435 INFO L225 Difference]: With dead ends: 641 [2022-07-14 06:10:02,435 INFO L226 Difference]: Without dead ends: 641 [2022-07-14 06:10:02,436 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2022-07-14 06:10:02,436 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 364 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:02,436 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [364 Valid, 232 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:10:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-07-14 06:10:02,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 535. [2022-07-14 06:10:02,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 532 states have (on average 1.1428571428571428) internal successors, (608), 534 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:02,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 608 transitions. [2022-07-14 06:10:02,451 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 608 transitions. Word has length 62 [2022-07-14 06:10:02,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:02,451 INFO L495 AbstractCegarLoop]: Abstraction has 535 states and 608 transitions. [2022-07-14 06:10:02,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 5.454545454545454) internal successors, (120), 23 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 608 transitions. [2022-07-14 06:10:02,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-14 06:10:02,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:02,452 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:02,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:02,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-14 06:10:02,669 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:02,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:02,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1748804299, now seen corresponding path program 4 times [2022-07-14 06:10:02,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:02,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130494629] [2022-07-14 06:10:02,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:02,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 27 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:02,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:02,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130494629] [2022-07-14 06:10:02,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130494629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:02,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218973197] [2022-07-14 06:10:02,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:10:02,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:02,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:02,773 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:02,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-14 06:10:02,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:10:02,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:02,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-14 06:10:02,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:02,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:10:02,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:10:02,925 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:10:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 46 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:03,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:03,193 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 31 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:03,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218973197] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:03,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:03,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 26 [2022-07-14 06:10:03,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015853032] [2022-07-14 06:10:03,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:03,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-14 06:10:03,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:03,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-14 06:10:03,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2022-07-14 06:10:03,194 INFO L87 Difference]: Start difference. First operand 535 states and 608 transitions. Second operand has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:03,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:03,403 INFO L93 Difference]: Finished difference Result 545 states and 614 transitions. [2022-07-14 06:10:03,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-14 06:10:03,403 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 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 62 [2022-07-14 06:10:03,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:03,405 INFO L225 Difference]: With dead ends: 545 [2022-07-14 06:10:03,405 INFO L226 Difference]: Without dead ends: 510 [2022-07-14 06:10:03,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=1046, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 06:10:03,405 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 221 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:03,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 234 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-14 06:10:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-07-14 06:10:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 504. [2022-07-14 06:10:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 501 states have (on average 1.1477045908183632) internal successors, (575), 503 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 575 transitions. [2022-07-14 06:10:03,410 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 575 transitions. Word has length 62 [2022-07-14 06:10:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:03,410 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 575 transitions. [2022-07-14 06:10:03,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.384615384615385) internal successors, (114), 26 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 575 transitions. [2022-07-14 06:10:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-14 06:10:03,411 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:03,411 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:03,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:03,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:03,611 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:03,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash -869581682, now seen corresponding path program 4 times [2022-07-14 06:10:03,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:03,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892982083] [2022-07-14 06:10:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:03,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:03,757 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:03,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:03,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892982083] [2022-07-14 06:10:03,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892982083] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:03,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36692963] [2022-07-14 06:10:03,757 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:10:03,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:03,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:03,771 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:03,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-14 06:10:03,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:10:03,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:03,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-14 06:10:03,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:03,874 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:10:03,874 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:10:03,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:10:04,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:10:04,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-14 06:10:04,196 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-14 06:10:04,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:04,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-14 06:10:04,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-14 06:10:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-14 06:10:04,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36692963] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:04,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:04,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2022-07-14 06:10:04,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401871817] [2022-07-14 06:10:04,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:04,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-14 06:10:04,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:04,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-14 06:10:04,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2022-07-14 06:10:04,696 INFO L87 Difference]: Start difference. First operand 504 states and 575 transitions. Second operand has 32 states, 32 states have (on average 4.28125) internal successors, (137), 32 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:05,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:05,423 INFO L93 Difference]: Finished difference Result 494 states and 554 transitions. [2022-07-14 06:10:05,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-14 06:10:05,423 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 4.28125) internal successors, (137), 32 states have internal predecessors, (137), 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 63 [2022-07-14 06:10:05,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:05,424 INFO L225 Difference]: With dead ends: 494 [2022-07-14 06:10:05,425 INFO L226 Difference]: Without dead ends: 485 [2022-07-14 06:10:05,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=488, Invalid=3672, Unknown=0, NotChecked=0, Total=4160 [2022-07-14 06:10:05,425 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 128 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 432 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:05,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 667 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 652 Invalid, 0 Unknown, 432 Unchecked, 0.2s Time] [2022-07-14 06:10:05,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-07-14 06:10:05,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 475. [2022-07-14 06:10:05,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 472 states have (on average 1.1334745762711864) internal successors, (535), 474 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:05,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 535 transitions. [2022-07-14 06:10:05,430 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 535 transitions. Word has length 63 [2022-07-14 06:10:05,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:05,430 INFO L495 AbstractCegarLoop]: Abstraction has 475 states and 535 transitions. [2022-07-14 06:10:05,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 4.28125) internal successors, (137), 32 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:05,431 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 535 transitions. [2022-07-14 06:10:05,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-14 06:10:05,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:05,431 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 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] [2022-07-14 06:10:05,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:05,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:05,649 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:05,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:05,649 INFO L85 PathProgramCache]: Analyzing trace with hash 876255922, now seen corresponding path program 5 times [2022-07-14 06:10:05,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:05,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421564146] [2022-07-14 06:10:05,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:05,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 43 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:10:05,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:05,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421564146] [2022-07-14 06:10:05,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421564146] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:05,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912158202] [2022-07-14 06:10:05,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:10:05,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:05,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:05,840 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:05,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-14 06:10:05,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-14 06:10:05,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:05,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-14 06:10:05,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:06,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:10:06,278 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-14 06:10:06,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-14 06:10:06,292 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:06,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:06,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:10:06,394 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:10:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 53 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:06,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912158202] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:06,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:06,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 36 [2022-07-14 06:10:06,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708527143] [2022-07-14 06:10:06,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:06,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-14 06:10:06,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:06,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-14 06:10:06,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2022-07-14 06:10:06,467 INFO L87 Difference]: Start difference. First operand 475 states and 535 transitions. Second operand has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 36 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:07,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:07,142 INFO L93 Difference]: Finished difference Result 455 states and 497 transitions. [2022-07-14 06:10:07,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-14 06:10:07,142 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 36 states have internal predecessors, (140), 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 66 [2022-07-14 06:10:07,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:07,144 INFO L225 Difference]: With dead ends: 455 [2022-07-14 06:10:07,146 INFO L226 Difference]: Without dead ends: 399 [2022-07-14 06:10:07,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 5 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=339, Invalid=4083, Unknown=0, NotChecked=0, Total=4422 [2022-07-14 06:10:07,146 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 70 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:07,146 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 829 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 596 Invalid, 0 Unknown, 251 Unchecked, 0.1s Time] [2022-07-14 06:10:07,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-07-14 06:10:07,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 331. [2022-07-14 06:10:07,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 328 states have (on average 1.1310975609756098) internal successors, (371), 330 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:07,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 371 transitions. [2022-07-14 06:10:07,178 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 371 transitions. Word has length 66 [2022-07-14 06:10:07,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:07,178 INFO L495 AbstractCegarLoop]: Abstraction has 331 states and 371 transitions. [2022-07-14 06:10:07,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 36 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 371 transitions. [2022-07-14 06:10:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-14 06:10:07,180 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:07,180 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:07,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:07,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-14 06:10:07,394 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:07,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:07,395 INFO L85 PathProgramCache]: Analyzing trace with hash -287521902, now seen corresponding path program 5 times [2022-07-14 06:10:07,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:07,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841917339] [2022-07-14 06:10:07,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:07,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:07,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:07,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:07,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841917339] [2022-07-14 06:10:07,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841917339] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:07,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67087951] [2022-07-14 06:10:07,573 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:10:07,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:07,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:07,574 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:07,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-14 06:10:07,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-14 06:10:07,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:07,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:10:07,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:07,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:10:08,087 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-14 06:10:08,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-14 06:10:08,103 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:08,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:08,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:10:08,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:10:08,336 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:08,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67087951] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:08,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:08,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 41 [2022-07-14 06:10:08,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227493044] [2022-07-14 06:10:08,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:08,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:10:08,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:08,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:10:08,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1537, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:10:08,338 INFO L87 Difference]: Start difference. First operand 331 states and 371 transitions. Second operand has 41 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 41 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:09,828 INFO L93 Difference]: Finished difference Result 761 states and 838 transitions. [2022-07-14 06:10:09,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-14 06:10:09,829 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 41 states have internal predecessors, (142), 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 66 [2022-07-14 06:10:09,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:09,834 INFO L225 Difference]: With dead ends: 761 [2022-07-14 06:10:09,834 INFO L226 Difference]: Without dead ends: 755 [2022-07-14 06:10:09,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 111 SyntacticMatches, 7 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 2155 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=640, Invalid=7916, Unknown=0, NotChecked=0, Total=8556 [2022-07-14 06:10:09,836 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 577 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 577 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 2947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 566 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:09,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [577 Valid, 1387 Invalid, 2947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2308 Invalid, 0 Unknown, 566 Unchecked, 0.5s Time] [2022-07-14 06:10:09,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 755 states. [2022-07-14 06:10:09,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 755 to 395. [2022-07-14 06:10:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 392 states have (on average 1.1326530612244898) internal successors, (444), 394 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:09,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 444 transitions. [2022-07-14 06:10:09,869 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 444 transitions. Word has length 66 [2022-07-14 06:10:09,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:09,869 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 444 transitions. [2022-07-14 06:10:09,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.4634146341463414) internal successors, (142), 41 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:09,870 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 444 transitions. [2022-07-14 06:10:09,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-14 06:10:09,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:09,870 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:09,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:10,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-14 06:10:10,071 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:10,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:10,071 INFO L85 PathProgramCache]: Analyzing trace with hash 850414963, now seen corresponding path program 7 times [2022-07-14 06:10:10,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:10,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350684573] [2022-07-14 06:10:10,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:10,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:10,224 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 31 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:10,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:10,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350684573] [2022-07-14 06:10:10,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350684573] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:10,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77255735] [2022-07-14 06:10:10,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:10:10,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:10,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:10,227 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:10,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-14 06:10:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:10,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-14 06:10:10,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:10,348 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:10:10,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:10:10,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:10:10,517 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:10:10,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-07-14 06:10:10,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:10:10,636 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:10,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 10 [2022-07-14 06:10:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:10,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:10,727 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_substring_~ps~0#1.offset_74| Int) (v_ArrVal_1053 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps~0#1.offset_74|) (not (<= 0 |v_ULTIMATE.start_substring_~ps~0#1.offset_74|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1053) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_74| 3)) 0))) is different from false [2022-07-14 06:10:10,732 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:10,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:10:10,737 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:10,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:10:10,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:10:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 31 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:11,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77255735] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:11,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:11,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 19, 19] total 42 [2022-07-14 06:10:11,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378699663] [2022-07-14 06:10:11,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:11,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:10:11,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:11,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:10:11,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1508, Unknown=1, NotChecked=78, Total=1722 [2022-07-14 06:10:11,415 INFO L87 Difference]: Start difference. First operand 395 states and 444 transitions. Second operand has 42 states, 42 states have (on average 3.6904761904761907) internal successors, (155), 42 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:11,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:11,974 INFO L93 Difference]: Finished difference Result 627 states and 691 transitions. [2022-07-14 06:10:11,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:10:11,975 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.6904761904761907) internal successors, (155), 42 states have internal predecessors, (155), 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 72 [2022-07-14 06:10:11,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:11,976 INFO L225 Difference]: With dead ends: 627 [2022-07-14 06:10:11,976 INFO L226 Difference]: Without dead ends: 563 [2022-07-14 06:10:11,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=343, Invalid=3317, Unknown=4, NotChecked=118, Total=3782 [2022-07-14 06:10:11,977 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 185 mSDsluCounter, 699 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 374 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:11,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 730 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 739 Invalid, 0 Unknown, 374 Unchecked, 0.2s Time] [2022-07-14 06:10:11,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-07-14 06:10:11,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 556. [2022-07-14 06:10:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 553 states have (on average 1.1157323688969258) internal successors, (617), 555 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:11,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 617 transitions. [2022-07-14 06:10:11,982 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 617 transitions. Word has length 72 [2022-07-14 06:10:11,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:11,983 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 617 transitions. [2022-07-14 06:10:11,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.6904761904761907) internal successors, (155), 42 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:11,983 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 617 transitions. [2022-07-14 06:10:11,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-14 06:10:11,984 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:11,984 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:12,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:12,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-14 06:10:12,200 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:12,201 INFO L85 PathProgramCache]: Analyzing trace with hash 779597011, now seen corresponding path program 6 times [2022-07-14 06:10:12,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:12,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046424572] [2022-07-14 06:10:12,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:12,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:12,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:12,319 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 1 proven. 77 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:10:12,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:12,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046424572] [2022-07-14 06:10:12,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046424572] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:12,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312259724] [2022-07-14 06:10:12,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:10:12,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:12,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:12,321 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:12,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-14 06:10:12,441 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-14 06:10:12,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:12,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-14 06:10:12,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:12,602 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:10:12,910 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:12,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:10:13,040 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:13,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:13,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:10:13,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:10:13,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:10:13,646 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:13,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312259724] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:13,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:13,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 21, 20] total 50 [2022-07-14 06:10:13,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436234291] [2022-07-14 06:10:13,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:13,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-14 06:10:13,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:13,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-14 06:10:13,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2302, Unknown=0, NotChecked=0, Total=2550 [2022-07-14 06:10:13,648 INFO L87 Difference]: Start difference. First operand 556 states and 617 transitions. Second operand has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:14,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:14,643 INFO L93 Difference]: Finished difference Result 823 states and 902 transitions. [2022-07-14 06:10:14,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-14 06:10:14,643 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 states have internal predecessors, (204), 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 74 [2022-07-14 06:10:14,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:14,645 INFO L225 Difference]: With dead ends: 823 [2022-07-14 06:10:14,645 INFO L226 Difference]: Without dead ends: 789 [2022-07-14 06:10:14,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 130 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=776, Invalid=6196, Unknown=0, NotChecked=0, Total=6972 [2022-07-14 06:10:14,646 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 260 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:14,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [260 Valid, 970 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 562 Invalid, 0 Unknown, 75 Unchecked, 0.2s Time] [2022-07-14 06:10:14,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-07-14 06:10:14,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 647. [2022-07-14 06:10:14,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 647 states, 644 states have (on average 1.1195652173913044) internal successors, (721), 646 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 647 states to 647 states and 721 transitions. [2022-07-14 06:10:14,652 INFO L78 Accepts]: Start accepts. Automaton has 647 states and 721 transitions. Word has length 74 [2022-07-14 06:10:14,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:14,652 INFO L495 AbstractCegarLoop]: Abstraction has 647 states and 721 transitions. [2022-07-14 06:10:14,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 4.08) internal successors, (204), 51 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:14,653 INFO L276 IsEmpty]: Start isEmpty. Operand 647 states and 721 transitions. [2022-07-14 06:10:14,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-14 06:10:14,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:14,654 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:14,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-07-14 06:10:14,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-14 06:10:14,854 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:14,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:14,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1176796164, now seen corresponding path program 7 times [2022-07-14 06:10:14,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:14,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152685110] [2022-07-14 06:10:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:14,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:14,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 25 proven. 59 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:10:15,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:15,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152685110] [2022-07-14 06:10:15,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152685110] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:15,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494941150] [2022-07-14 06:10:15,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:10:15,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:15,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:15,102 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:15,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-14 06:10:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:15,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:10:15,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:15,294 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:10:15,532 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-14 06:10:15,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-14 06:10:15,547 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-14 06:10:15,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:15,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:10:15,685 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:10:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 69 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-14 06:10:15,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494941150] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:15,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:15,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16, 16] total 42 [2022-07-14 06:10:15,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448794957] [2022-07-14 06:10:15,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:15,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:10:15,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:15,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:10:15,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1616, Unknown=0, NotChecked=0, Total=1722 [2022-07-14 06:10:15,773 INFO L87 Difference]: Start difference. First operand 647 states and 721 transitions. Second operand has 42 states, 42 states have (on average 4.0) internal successors, (168), 42 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:18,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:18,156 INFO L93 Difference]: Finished difference Result 941 states and 1021 transitions. [2022-07-14 06:10:18,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-14 06:10:18,156 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.0) internal successors, (168), 42 states have internal predecessors, (168), 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 74 [2022-07-14 06:10:18,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:18,158 INFO L225 Difference]: With dead ends: 941 [2022-07-14 06:10:18,159 INFO L226 Difference]: Without dead ends: 927 [2022-07-14 06:10:18,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 125 SyntacticMatches, 7 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 6 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=751, Invalid=8951, Unknown=0, NotChecked=0, Total=9702 [2022-07-14 06:10:18,160 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 563 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 2840 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1831 SdHoareTripleChecker+Invalid, 3384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 2840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 454 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:18,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 1831 Invalid, 3384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 2840 Invalid, 0 Unknown, 454 Unchecked, 0.7s Time] [2022-07-14 06:10:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-07-14 06:10:18,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 778. [2022-07-14 06:10:18,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 775 states have (on average 1.112258064516129) internal successors, (862), 777 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:18,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 862 transitions. [2022-07-14 06:10:18,166 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 862 transitions. Word has length 74 [2022-07-14 06:10:18,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:18,167 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 862 transitions. [2022-07-14 06:10:18,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.0) internal successors, (168), 42 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:18,167 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 862 transitions. [2022-07-14 06:10:18,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-14 06:10:18,168 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:18,168 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:18,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:18,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:18,383 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:18,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1703030388, now seen corresponding path program 6 times [2022-07-14 06:10:18,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:18,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305172096] [2022-07-14 06:10:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:18,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:18,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:18,532 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 6 proven. 68 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:18,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:18,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305172096] [2022-07-14 06:10:18,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305172096] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:18,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606984049] [2022-07-14 06:10:18,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:10:18,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:18,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:18,552 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:18,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-14 06:10:18,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-14 06:10:18,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:18,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-14 06:10:18,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:18,708 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:10:18,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:10:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:19,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:19,400 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 46 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:19,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606984049] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:19,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:19,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2022-07-14 06:10:19,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619337684] [2022-07-14 06:10:19,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:19,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:10:19,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:19,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:10:19,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1410, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:10:19,402 INFO L87 Difference]: Start difference. First operand 778 states and 862 transitions. Second operand has 41 states, 40 states have (on average 4.45) internal successors, (178), 41 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:19,875 INFO L93 Difference]: Finished difference Result 1167 states and 1291 transitions. [2022-07-14 06:10:19,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 06:10:19,875 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.45) internal successors, (178), 41 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2022-07-14 06:10:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:19,877 INFO L225 Difference]: With dead ends: 1167 [2022-07-14 06:10:19,877 INFO L226 Difference]: Without dead ends: 1167 [2022-07-14 06:10:19,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=588, Invalid=2274, Unknown=0, NotChecked=0, Total=2862 [2022-07-14 06:10:19,878 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 634 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:19,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 533 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:10:19,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-07-14 06:10:19,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 968. [2022-07-14 06:10:19,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 965 states have (on average 1.1264248704663213) internal successors, (1087), 967 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:19,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1087 transitions. [2022-07-14 06:10:19,886 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1087 transitions. Word has length 74 [2022-07-14 06:10:19,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:19,886 INFO L495 AbstractCegarLoop]: Abstraction has 968 states and 1087 transitions. [2022-07-14 06:10:19,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.45) internal successors, (178), 41 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:19,886 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1087 transitions. [2022-07-14 06:10:19,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-14 06:10:19,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:19,887 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:19,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-14 06:10:20,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:20,096 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:20,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:20,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1960256400, now seen corresponding path program 8 times [2022-07-14 06:10:20,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:20,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782460330] [2022-07-14 06:10:20,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:20,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:20,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:20,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782460330] [2022-07-14 06:10:20,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782460330] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:20,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377005575] [2022-07-14 06:10:20,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:20,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:20,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:20,220 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:20,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-14 06:10:20,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:20,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:20,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-14 06:10:20,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:20,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:20,759 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:10:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:20,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377005575] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:20,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:20,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 27 [2022-07-14 06:10:20,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708737733] [2022-07-14 06:10:20,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:20,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-14 06:10:20,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:20,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-14 06:10:20,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2022-07-14 06:10:20,792 INFO L87 Difference]: Start difference. First operand 968 states and 1087 transitions. Second operand has 28 states, 27 states have (on average 6.0) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:21,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:21,074 INFO L93 Difference]: Finished difference Result 1229 states and 1384 transitions. [2022-07-14 06:10:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-14 06:10:21,074 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 6.0) internal successors, (162), 28 states have internal predecessors, (162), 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 76 [2022-07-14 06:10:21,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:21,076 INFO L225 Difference]: With dead ends: 1229 [2022-07-14 06:10:21,076 INFO L226 Difference]: Without dead ends: 1229 [2022-07-14 06:10:21,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=271, Invalid=1061, Unknown=0, NotChecked=0, Total=1332 [2022-07-14 06:10:21,077 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 388 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:21,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 534 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:10:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-07-14 06:10:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1095. [2022-07-14 06:10:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1095 states, 1092 states have (on average 1.1336996336996337) internal successors, (1238), 1094 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:21,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1095 states to 1095 states and 1238 transitions. [2022-07-14 06:10:21,085 INFO L78 Accepts]: Start accepts. Automaton has 1095 states and 1238 transitions. Word has length 76 [2022-07-14 06:10:21,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:21,085 INFO L495 AbstractCegarLoop]: Abstraction has 1095 states and 1238 transitions. [2022-07-14 06:10:21,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 6.0) internal successors, (162), 28 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:21,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1095 states and 1238 transitions. [2022-07-14 06:10:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-14 06:10:21,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:21,086 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:21,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:21,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-07-14 06:10:21,303 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:21,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1781498856, now seen corresponding path program 8 times [2022-07-14 06:10:21,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:21,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679359816] [2022-07-14 06:10:21,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:21,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:21,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:21,688 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:21,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:21,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679359816] [2022-07-14 06:10:21,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679359816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:21,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760921950] [2022-07-14 06:10:21,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:21,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:21,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:21,690 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:21,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-14 06:10:21,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:21,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:21,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-14 06:10:21,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:21,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:10:22,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:10:22,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:10:22,305 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:10:22,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-07-14 06:10:22,327 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:22,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:22,423 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1274 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1274) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:10:22,426 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:22,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:10:22,429 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:22,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:10:22,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:10:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 20 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:22,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760921950] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:22,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:22,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 44 [2022-07-14 06:10:22,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839809500] [2022-07-14 06:10:22,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:22,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-14 06:10:22,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:22,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-14 06:10:22,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1686, Unknown=1, NotChecked=82, Total=1892 [2022-07-14 06:10:22,568 INFO L87 Difference]: Start difference. First operand 1095 states and 1238 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:23,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:23,315 INFO L93 Difference]: Finished difference Result 1099 states and 1234 transitions. [2022-07-14 06:10:23,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-14 06:10:23,315 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 states have internal predecessors, (130), 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 78 [2022-07-14 06:10:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:23,317 INFO L225 Difference]: With dead ends: 1099 [2022-07-14 06:10:23,317 INFO L226 Difference]: Without dead ends: 995 [2022-07-14 06:10:23,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 133 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=386, Invalid=3399, Unknown=1, NotChecked=120, Total=3906 [2022-07-14 06:10:23,318 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 376 mSDsluCounter, 790 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:23,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 824 Invalid, 1285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1081 Invalid, 0 Unknown, 170 Unchecked, 0.2s Time] [2022-07-14 06:10:23,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-07-14 06:10:23,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 951. [2022-07-14 06:10:23,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 951 states, 948 states have (on average 1.140295358649789) internal successors, (1081), 950 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 951 states to 951 states and 1081 transitions. [2022-07-14 06:10:23,325 INFO L78 Accepts]: Start accepts. Automaton has 951 states and 1081 transitions. Word has length 78 [2022-07-14 06:10:23,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:23,325 INFO L495 AbstractCegarLoop]: Abstraction has 951 states and 1081 transitions. [2022-07-14 06:10:23,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 44 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:23,326 INFO L276 IsEmpty]: Start isEmpty. Operand 951 states and 1081 transitions. [2022-07-14 06:10:23,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-14 06:10:23,327 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:23,327 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:23,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:23,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:23,536 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:23,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1662372974, now seen corresponding path program 5 times [2022-07-14 06:10:23,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:23,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879298583] [2022-07-14 06:10:23,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:23,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 6 proven. 84 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:23,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:23,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879298583] [2022-07-14 06:10:23,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879298583] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:23,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60085423] [2022-07-14 06:10:23,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:10:23,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:23,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:23,658 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:23,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-14 06:10:23,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-14 06:10:23,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:23,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-14 06:10:23,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:23,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:10:23,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:10:23,816 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:10:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:24,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:24,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60085423] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:24,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:24,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-07-14 06:10:24,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413311054] [2022-07-14 06:10:24,304 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:24,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-14 06:10:24,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:24,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-14 06:10:24,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-07-14 06:10:24,306 INFO L87 Difference]: Start difference. First operand 951 states and 1081 transitions. Second operand has 33 states, 32 states have (on average 5.625) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:24,747 INFO L93 Difference]: Finished difference Result 981 states and 1108 transitions. [2022-07-14 06:10:24,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:10:24,747 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 5.625) internal successors, (180), 33 states have internal predecessors, (180), 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 78 [2022-07-14 06:10:24,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:24,749 INFO L225 Difference]: With dead ends: 981 [2022-07-14 06:10:24,749 INFO L226 Difference]: Without dead ends: 981 [2022-07-14 06:10:24,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=492, Invalid=1860, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 06:10:24,750 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 320 mSDsluCounter, 445 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:24,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 493 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:10:24,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-07-14 06:10:24,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 955. [2022-07-14 06:10:24,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 952 states have (on average 1.1397058823529411) internal successors, (1085), 954 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:24,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1085 transitions. [2022-07-14 06:10:24,757 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1085 transitions. Word has length 78 [2022-07-14 06:10:24,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:24,757 INFO L495 AbstractCegarLoop]: Abstraction has 955 states and 1085 transitions. [2022-07-14 06:10:24,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 5.625) internal successors, (180), 33 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:24,757 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1085 transitions. [2022-07-14 06:10:24,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-14 06:10:24,758 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:24,759 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:24,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:24,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:24,971 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:24,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:24,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1715458345, now seen corresponding path program 9 times [2022-07-14 06:10:24,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:24,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274856872] [2022-07-14 06:10:24,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:24,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:24,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 1 proven. 103 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-14 06:10:25,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:25,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274856872] [2022-07-14 06:10:25,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274856872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:25,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147264956] [2022-07-14 06:10:25,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:10:25,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:25,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:25,093 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:25,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-14 06:10:25,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-14 06:10:25,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:25,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-14 06:10:25,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:25,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:10:25,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:10:25,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:10:25,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-14 06:10:25,608 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:25,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2022-07-14 06:10:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:10:25,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:26,267 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:26,267 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 27 [2022-07-14 06:10:26,271 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:26,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2022-07-14 06:10:26,276 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:26,276 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-07-14 06:10:26,486 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:10:26,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147264956] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:26,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:26,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15, 16] total 40 [2022-07-14 06:10:26,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795343038] [2022-07-14 06:10:26,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:26,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:10:26,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:26,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:10:26,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:10:26,488 INFO L87 Difference]: Start difference. First operand 955 states and 1085 transitions. Second operand has 41 states, 40 states have (on average 4.275) internal successors, (171), 41 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:28,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:28,586 INFO L93 Difference]: Finished difference Result 1088 states and 1210 transitions. [2022-07-14 06:10:28,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-14 06:10:28,586 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 4.275) internal successors, (171), 41 states have internal predecessors, (171), 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 81 [2022-07-14 06:10:28,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:28,588 INFO L225 Difference]: With dead ends: 1088 [2022-07-14 06:10:28,589 INFO L226 Difference]: Without dead ends: 971 [2022-07-14 06:10:28,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2255 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1089, Invalid=7653, Unknown=0, NotChecked=0, Total=8742 [2022-07-14 06:10:28,589 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 220 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 414 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:28,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 428 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 887 Invalid, 0 Unknown, 414 Unchecked, 0.3s Time] [2022-07-14 06:10:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2022-07-14 06:10:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 793. [2022-07-14 06:10:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 790 states have (on average 1.1379746835443039) internal successors, (899), 792 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:28,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 899 transitions. [2022-07-14 06:10:28,596 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 899 transitions. Word has length 81 [2022-07-14 06:10:28,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:28,597 INFO L495 AbstractCegarLoop]: Abstraction has 793 states and 899 transitions. [2022-07-14 06:10:28,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 4.275) internal successors, (171), 41 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:28,597 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 899 transitions. [2022-07-14 06:10:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-14 06:10:28,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:28,599 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:28,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:28,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-14 06:10:28,819 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:28,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:28,820 INFO L85 PathProgramCache]: Analyzing trace with hash 515705984, now seen corresponding path program 10 times [2022-07-14 06:10:28,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:28,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812515866] [2022-07-14 06:10:28,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:28,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 80 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:10:29,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:29,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812515866] [2022-07-14 06:10:29,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812515866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:29,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118827018] [2022-07-14 06:10:29,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:10:29,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:29,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:29,039 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:29,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-14 06:10:29,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:10:29,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:29,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-14 06:10:29,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:29,173 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:10:29,173 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:10:29,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:10:29,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:10:29,639 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-14 06:10:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 34 proven. 69 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:10:29,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:30,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-14 06:10:30,007 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-14 06:10:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 29 proven. 74 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-14 06:10:30,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118827018] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:30,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:30,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 47 [2022-07-14 06:10:30,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777269351] [2022-07-14 06:10:30,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:30,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-14 06:10:30,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:30,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-14 06:10:30,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2022-07-14 06:10:30,422 INFO L87 Difference]: Start difference. First operand 793 states and 899 transitions. Second operand has 47 states, 47 states have (on average 3.9361702127659575) internal successors, (185), 47 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:31,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:31,363 INFO L93 Difference]: Finished difference Result 786 states and 873 transitions. [2022-07-14 06:10:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-14 06:10:31,363 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.9361702127659575) internal successors, (185), 47 states have internal predecessors, (185), 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 81 [2022-07-14 06:10:31,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:31,366 INFO L225 Difference]: With dead ends: 786 [2022-07-14 06:10:31,366 INFO L226 Difference]: Without dead ends: 708 [2022-07-14 06:10:31,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1670 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=768, Invalid=7242, Unknown=0, NotChecked=0, Total=8010 [2022-07-14 06:10:31,386 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 174 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 429 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:31,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 915 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 537 Invalid, 0 Unknown, 429 Unchecked, 0.2s Time] [2022-07-14 06:10:31,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2022-07-14 06:10:31,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 572. [2022-07-14 06:10:31,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 569 states have (on average 1.131810193321617) internal successors, (644), 571 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:31,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 644 transitions. [2022-07-14 06:10:31,397 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 644 transitions. Word has length 81 [2022-07-14 06:10:31,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:31,398 INFO L495 AbstractCegarLoop]: Abstraction has 572 states and 644 transitions. [2022-07-14 06:10:31,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.9361702127659575) internal successors, (185), 47 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:31,398 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 644 transitions. [2022-07-14 06:10:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-14 06:10:31,399 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:31,399 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:31,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:31,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-14 06:10:31,616 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:31,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:31,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1514648788, now seen corresponding path program 7 times [2022-07-14 06:10:31,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:31,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097793685] [2022-07-14 06:10:31,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:31,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:32,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:32,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097793685] [2022-07-14 06:10:32,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097793685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:32,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254590673] [2022-07-14 06:10:32,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:10:32,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:32,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:32,210 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:32,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-14 06:10:32,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:32,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 06:10:32,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:32,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:10:32,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:10:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:32,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:32,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:10:32,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:10:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 21 proven. 82 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:32,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254590673] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:32,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:32,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18, 18] total 41 [2022-07-14 06:10:32,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237979416] [2022-07-14 06:10:32,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:32,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:10:32,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:32,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:10:32,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2022-07-14 06:10:32,927 INFO L87 Difference]: Start difference. First operand 572 states and 644 transitions. Second operand has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 41 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:35,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:35,448 INFO L93 Difference]: Finished difference Result 1509 states and 1672 transitions. [2022-07-14 06:10:35,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-14 06:10:35,448 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 41 states have internal predecessors, (133), 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 81 [2022-07-14 06:10:35,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:35,451 INFO L225 Difference]: With dead ends: 1509 [2022-07-14 06:10:35,451 INFO L226 Difference]: Without dead ends: 1488 [2022-07-14 06:10:35,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 143 SyntacticMatches, 6 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=640, Invalid=5060, Unknown=0, NotChecked=0, Total=5700 [2022-07-14 06:10:35,452 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 1123 mSDsluCounter, 1801 mSDsCounter, 0 mSdLazyCounter, 2040 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1123 SdHoareTripleChecker+Valid, 1883 SdHoareTripleChecker+Invalid, 2498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 2040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:35,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1123 Valid, 1883 Invalid, 2498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 2040 Invalid, 0 Unknown, 377 Unchecked, 0.8s Time] [2022-07-14 06:10:35,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1488 states. [2022-07-14 06:10:35,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1488 to 840. [2022-07-14 06:10:35,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 837 states have (on average 1.135005973715651) internal successors, (950), 839 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:35,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 950 transitions. [2022-07-14 06:10:35,460 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 950 transitions. Word has length 81 [2022-07-14 06:10:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:35,460 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 950 transitions. [2022-07-14 06:10:35,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.2439024390243905) internal successors, (133), 41 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 950 transitions. [2022-07-14 06:10:35,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-14 06:10:35,461 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:35,461 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:35,483 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:35,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-14 06:10:35,678 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:35,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:35,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1760327563, now seen corresponding path program 11 times [2022-07-14 06:10:35,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:35,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050847722] [2022-07-14 06:10:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:35,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:35,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:35,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050847722] [2022-07-14 06:10:35,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050847722] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:35,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099776274] [2022-07-14 06:10:35,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:10:35,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:35,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:35,808 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:35,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-14 06:10:35,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-14 06:10:35,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:35,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-14 06:10:35,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:36,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:10:36,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:10:36,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:10:36,328 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:36,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:36,664 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 70 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:36,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099776274] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:36,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:36,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2022-07-14 06:10:36,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459382034] [2022-07-14 06:10:36,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:36,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-14 06:10:36,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:36,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-14 06:10:36,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-07-14 06:10:36,666 INFO L87 Difference]: Start difference. First operand 840 states and 950 transitions. Second operand has 34 states, 33 states have (on average 6.121212121212121) internal successors, (202), 34 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:37,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:37,291 INFO L93 Difference]: Finished difference Result 938 states and 1039 transitions. [2022-07-14 06:10:37,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-14 06:10:37,291 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 6.121212121212121) internal successors, (202), 34 states have internal predecessors, (202), 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 82 [2022-07-14 06:10:37,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:37,293 INFO L225 Difference]: With dead ends: 938 [2022-07-14 06:10:37,293 INFO L226 Difference]: Without dead ends: 938 [2022-07-14 06:10:37,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=616, Invalid=2354, Unknown=0, NotChecked=0, Total=2970 [2022-07-14 06:10:37,294 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 794 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 794 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:37,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [794 Valid, 389 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:10:37,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-07-14 06:10:37,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 840. [2022-07-14 06:10:37,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 837 states have (on average 1.1314217443249701) internal successors, (947), 839 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:37,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 947 transitions. [2022-07-14 06:10:37,301 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 947 transitions. Word has length 82 [2022-07-14 06:10:37,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:37,302 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 947 transitions. [2022-07-14 06:10:37,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 6.121212121212121) internal successors, (202), 34 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:37,302 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 947 transitions. [2022-07-14 06:10:37,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-14 06:10:37,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:37,303 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:37,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:37,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:37,516 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:37,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:37,517 INFO L85 PathProgramCache]: Analyzing trace with hash 87879678, now seen corresponding path program 12 times [2022-07-14 06:10:37,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:37,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025963873] [2022-07-14 06:10:37,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:37,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:37,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:37,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025963873] [2022-07-14 06:10:37,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025963873] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:37,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670618367] [2022-07-14 06:10:37,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:10:37,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:37,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:37,692 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:37,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-14 06:10:37,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-14 06:10:37,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:37,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-14 06:10:37,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:38,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:38,154 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-07-14 06:10:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:38,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670618367] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:38,178 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:38,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 34 [2022-07-14 06:10:38,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329766705] [2022-07-14 06:10:38,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:38,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-14 06:10:38,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:38,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-14 06:10:38,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:10:38,180 INFO L87 Difference]: Start difference. First operand 840 states and 947 transitions. Second operand has 35 states, 34 states have (on average 5.235294117647059) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:38,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:38,730 INFO L93 Difference]: Finished difference Result 924 states and 1024 transitions. [2022-07-14 06:10:38,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-14 06:10:38,731 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 5.235294117647059) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-14 06:10:38,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:38,733 INFO L225 Difference]: With dead ends: 924 [2022-07-14 06:10:38,733 INFO L226 Difference]: Without dead ends: 924 [2022-07-14 06:10:38,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 607 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=745, Invalid=2561, Unknown=0, NotChecked=0, Total=3306 [2022-07-14 06:10:38,733 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 733 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:38,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [733 Valid, 348 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 646 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:10:38,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-07-14 06:10:38,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 840. [2022-07-14 06:10:38,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 837 states have (on average 1.1278375149342892) internal successors, (944), 839 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 944 transitions. [2022-07-14 06:10:38,740 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 944 transitions. Word has length 82 [2022-07-14 06:10:38,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:38,740 INFO L495 AbstractCegarLoop]: Abstraction has 840 states and 944 transitions. [2022-07-14 06:10:38,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 5.235294117647059) internal successors, (178), 35 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 944 transitions. [2022-07-14 06:10:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-14 06:10:38,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:38,741 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:38,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:38,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-14 06:10:38,952 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:38,952 INFO L85 PathProgramCache]: Analyzing trace with hash -725839209, now seen corresponding path program 8 times [2022-07-14 06:10:38,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:38,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638234459] [2022-07-14 06:10:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:38,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:38,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:39,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:39,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638234459] [2022-07-14 06:10:39,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638234459] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:39,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173726531] [2022-07-14 06:10:39,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:39,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:39,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:39,132 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:39,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-14 06:10:39,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:39,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:39,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-14 06:10:39,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:39,491 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:39,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:39,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:10:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 28 proven. 92 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:39,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173726531] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:39,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:39,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 34 [2022-07-14 06:10:39,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588117174] [2022-07-14 06:10:39,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:39,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-14 06:10:39,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:39,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-14 06:10:39,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:10:39,771 INFO L87 Difference]: Start difference. First operand 840 states and 944 transitions. Second operand has 35 states, 34 states have (on average 4.5) internal successors, (153), 35 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:40,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:40,739 INFO L93 Difference]: Finished difference Result 1216 states and 1362 transitions. [2022-07-14 06:10:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:10:40,739 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.5) internal successors, (153), 35 states have internal predecessors, (153), 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 85 [2022-07-14 06:10:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:40,742 INFO L225 Difference]: With dead ends: 1216 [2022-07-14 06:10:40,742 INFO L226 Difference]: Without dead ends: 1216 [2022-07-14 06:10:40,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 148 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=508, Invalid=2144, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 06:10:40,742 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 517 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1729 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:40,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 920 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1729 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:10:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2022-07-14 06:10:40,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1047. [2022-07-14 06:10:40,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1044 states have (on average 1.1455938697318007) internal successors, (1196), 1046 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:40,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1196 transitions. [2022-07-14 06:10:40,750 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1196 transitions. Word has length 85 [2022-07-14 06:10:40,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:40,750 INFO L495 AbstractCegarLoop]: Abstraction has 1047 states and 1196 transitions. [2022-07-14 06:10:40,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.5) internal successors, (153), 35 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:40,751 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1196 transitions. [2022-07-14 06:10:40,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-14 06:10:40,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:40,752 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:40,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:40,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-07-14 06:10:40,969 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:40,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1679386246, now seen corresponding path program 9 times [2022-07-14 06:10:40,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:40,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103448467] [2022-07-14 06:10:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:40,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:41,153 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:41,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:41,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103448467] [2022-07-14 06:10:41,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103448467] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:41,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961097445] [2022-07-14 06:10:41,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:10:41,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:41,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:41,155 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:41,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-14 06:10:41,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-14 06:10:41,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:41,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:10:41,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:41,349 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:10:41,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:10:41,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:10:41,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:10:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:41,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:41,760 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1666 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1666) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:10:41,763 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:41,763 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:10:41,766 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:41,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:10:41,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:10:41,870 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 41 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:41,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961097445] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:41,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:41,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 31 [2022-07-14 06:10:41,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384175015] [2022-07-14 06:10:41,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:41,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-14 06:10:41,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:41,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-14 06:10:41,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=782, Unknown=1, NotChecked=56, Total=930 [2022-07-14 06:10:41,872 INFO L87 Difference]: Start difference. First operand 1047 states and 1196 transitions. Second operand has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:42,149 INFO L93 Difference]: Finished difference Result 1442 states and 1622 transitions. [2022-07-14 06:10:42,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:10:42,150 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 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 87 [2022-07-14 06:10:42,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:42,152 INFO L225 Difference]: With dead ends: 1442 [2022-07-14 06:10:42,152 INFO L226 Difference]: Without dead ends: 1300 [2022-07-14 06:10:42,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=150, Invalid=1259, Unknown=1, NotChecked=72, Total=1482 [2022-07-14 06:10:42,153 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 102 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:42,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 639 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 559 Invalid, 0 Unknown, 176 Unchecked, 0.1s Time] [2022-07-14 06:10:42,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1300 states. [2022-07-14 06:10:42,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1300 to 1282. [2022-07-14 06:10:42,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1282 states, 1279 states have (on average 1.1383893666927287) internal successors, (1456), 1281 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:42,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 1456 transitions. [2022-07-14 06:10:42,162 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 1456 transitions. Word has length 87 [2022-07-14 06:10:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:42,162 INFO L495 AbstractCegarLoop]: Abstraction has 1282 states and 1456 transitions. [2022-07-14 06:10:42,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.645161290322581) internal successors, (144), 31 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:42,162 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 1456 transitions. [2022-07-14 06:10:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-14 06:10:42,163 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:42,163 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:42,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-07-14 06:10:42,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:42,380 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:42,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:42,381 INFO L85 PathProgramCache]: Analyzing trace with hash 679180061, now seen corresponding path program 6 times [2022-07-14 06:10:42,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:42,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659428989] [2022-07-14 06:10:42,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:42,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 19 proven. 143 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:10:42,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:42,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659428989] [2022-07-14 06:10:42,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659428989] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:42,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084941992] [2022-07-14 06:10:42,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:10:42,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:42,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:42,647 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:42,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-14 06:10:42,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-14 06:10:42,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:42,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:10:42,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:42,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:10:43,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:10:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 130 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:43,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:43,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:10:43,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:10:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 10 proven. 130 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:43,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084941992] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:43,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:43,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 20, 20] total 40 [2022-07-14 06:10:43,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735636218] [2022-07-14 06:10:43,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:43,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-14 06:10:43,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:43,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-14 06:10:43,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1435, Unknown=0, NotChecked=0, Total=1560 [2022-07-14 06:10:43,325 INFO L87 Difference]: Start difference. First operand 1282 states and 1456 transitions. Second operand has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:44,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:44,648 INFO L93 Difference]: Finished difference Result 2184 states and 2461 transitions. [2022-07-14 06:10:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-14 06:10:44,648 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 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 89 [2022-07-14 06:10:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:44,652 INFO L225 Difference]: With dead ends: 2184 [2022-07-14 06:10:44,652 INFO L226 Difference]: Without dead ends: 2155 [2022-07-14 06:10:44,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 160 SyntacticMatches, 5 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=524, Invalid=4168, Unknown=0, NotChecked=0, Total=4692 [2022-07-14 06:10:44,653 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 984 mSDsluCounter, 1552 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 984 SdHoareTripleChecker+Valid, 1659 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:44,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [984 Valid, 1659 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1586 Invalid, 0 Unknown, 291 Unchecked, 0.5s Time] [2022-07-14 06:10:44,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2022-07-14 06:10:44,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1643. [2022-07-14 06:10:44,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1640 states have (on average 1.1384146341463415) internal successors, (1867), 1642 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 1867 transitions. [2022-07-14 06:10:44,668 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 1867 transitions. Word has length 89 [2022-07-14 06:10:44,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:44,668 INFO L495 AbstractCegarLoop]: Abstraction has 1643 states and 1867 transitions. [2022-07-14 06:10:44,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 1867 transitions. [2022-07-14 06:10:44,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-14 06:10:44,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:44,670 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:44,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:44,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2022-07-14 06:10:44,887 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:44,887 INFO L85 PathProgramCache]: Analyzing trace with hash -2046876227, now seen corresponding path program 10 times [2022-07-14 06:10:44,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:44,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719830429] [2022-07-14 06:10:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:44,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 15 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:10:45,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:45,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719830429] [2022-07-14 06:10:45,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719830429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:45,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549343348] [2022-07-14 06:10:45,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:10:45,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:45,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:45,082 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:45,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-14 06:10:45,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:10:45,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:45,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-14 06:10:45,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:45,238 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:10:45,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:10:45,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:10:45,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:10:45,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-14 06:10:45,982 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:45,982 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:10:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 32 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:46,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:46,562 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1769 (Array Int Int)) (|v_ULTIMATE.start_substring_~ps~0#1.offset_136| Int)) (let ((.cse0 (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|))) (or (<= (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_136| 6) .cse0) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1769) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_136| 4)) 0) (< .cse0 (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_136| 3)) (not (<= 0 |v_ULTIMATE.start_substring_~ps~0#1.offset_136|)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps~0#1.offset_136|)))) is different from false [2022-07-14 06:10:46,567 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:46,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:10:46,571 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:46,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:10:46,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:10:47,541 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 45 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:47,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549343348] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:47,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:47,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22, 23] total 57 [2022-07-14 06:10:47,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775165731] [2022-07-14 06:10:47,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:47,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-14 06:10:47,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:47,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-14 06:10:47,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=2861, Unknown=1, NotChecked=110, Total=3306 [2022-07-14 06:10:47,543 INFO L87 Difference]: Start difference. First operand 1643 states and 1867 transitions. Second operand has 58 states, 57 states have (on average 4.649122807017544) internal successors, (265), 58 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:50,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:50,140 INFO L93 Difference]: Finished difference Result 1959 states and 2230 transitions. [2022-07-14 06:10:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-14 06:10:50,142 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 4.649122807017544) internal successors, (265), 58 states have internal predecessors, (265), 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 91 [2022-07-14 06:10:50,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:50,145 INFO L225 Difference]: With dead ends: 1959 [2022-07-14 06:10:50,145 INFO L226 Difference]: Without dead ends: 1959 [2022-07-14 06:10:50,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 141 SyntacticMatches, 28 SemanticMatches, 91 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1764 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1610, Invalid=6765, Unknown=1, NotChecked=180, Total=8556 [2022-07-14 06:10:50,146 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 1401 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 731 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:50,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1401 Valid, 976 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 1396 Invalid, 0 Unknown, 731 Unchecked, 0.5s Time] [2022-07-14 06:10:50,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2022-07-14 06:10:50,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1769. [2022-07-14 06:10:50,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1769 states, 1766 states have (on average 1.1432616081540203) internal successors, (2019), 1768 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:50,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1769 states to 1769 states and 2019 transitions. [2022-07-14 06:10:50,158 INFO L78 Accepts]: Start accepts. Automaton has 1769 states and 2019 transitions. Word has length 91 [2022-07-14 06:10:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:50,158 INFO L495 AbstractCegarLoop]: Abstraction has 1769 states and 2019 transitions. [2022-07-14 06:10:50,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 4.649122807017544) internal successors, (265), 58 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:50,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1769 states and 2019 transitions. [2022-07-14 06:10:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-14 06:10:50,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:50,160 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:50,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:50,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:50,377 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:50,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:50,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1003903189, now seen corresponding path program 13 times [2022-07-14 06:10:50,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:50,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297236050] [2022-07-14 06:10:50,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:50,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 25 proven. 131 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:50,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:50,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297236050] [2022-07-14 06:10:50,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297236050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:50,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720080790] [2022-07-14 06:10:50,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:10:50,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:50,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:50,983 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:50,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-14 06:10:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:51,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-14 06:10:51,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:51,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:10:51,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:10:51,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:10:51,630 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:10:51,630 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-07-14 06:10:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 25 proven. 116 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:51,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:51,801 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1820 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1820) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-07-14 06:10:51,804 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:51,804 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:10:51,807 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:51,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:10:51,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:10:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 25 proven. 116 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:10:52,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720080790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:52,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:52,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 23, 23] total 49 [2022-07-14 06:10:52,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12697906] [2022-07-14 06:10:52,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:52,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-14 06:10:52,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:52,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-14 06:10:52,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2115, Unknown=1, NotChecked=92, Total=2352 [2022-07-14 06:10:52,013 INFO L87 Difference]: Start difference. First operand 1769 states and 2019 transitions. Second operand has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:53,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:53,553 INFO L93 Difference]: Finished difference Result 1734 states and 1967 transitions. [2022-07-14 06:10:53,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-14 06:10:53,553 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 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 93 [2022-07-14 06:10:53,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:53,556 INFO L225 Difference]: With dead ends: 1734 [2022-07-14 06:10:53,556 INFO L226 Difference]: Without dead ends: 1582 [2022-07-14 06:10:53,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 159 SyntacticMatches, 8 SemanticMatches, 75 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=412, Invalid=5290, Unknown=2, NotChecked=148, Total=5852 [2022-07-14 06:10:53,557 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 200 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 2274 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:53,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1543 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2274 Invalid, 0 Unknown, 298 Unchecked, 0.7s Time] [2022-07-14 06:10:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2022-07-14 06:10:53,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1566. [2022-07-14 06:10:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1563 states have (on average 1.1433141394753679) internal successors, (1787), 1565 states have internal predecessors, (1787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:53,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 1787 transitions. [2022-07-14 06:10:53,567 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 1787 transitions. Word has length 93 [2022-07-14 06:10:53,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:53,567 INFO L495 AbstractCegarLoop]: Abstraction has 1566 states and 1787 transitions. [2022-07-14 06:10:53,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 1787 transitions. [2022-07-14 06:10:53,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-14 06:10:53,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:53,568 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:53,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:53,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:53,785 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:53,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1836805286, now seen corresponding path program 14 times [2022-07-14 06:10:53,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:53,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432667539] [2022-07-14 06:10:53,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:53,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 25 proven. 106 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:54,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:54,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432667539] [2022-07-14 06:10:54,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432667539] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:54,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379444322] [2022-07-14 06:10:54,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:10:54,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:54,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:54,062 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:54,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-14 06:10:54,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:10:54,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:54,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-14 06:10:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:54,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:10:54,400 INFO L356 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2022-07-14 06:10:54,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-14 06:10:54,625 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:10:54,625 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-07-14 06:10:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 25 proven. 106 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:54,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:56,030 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:10:56,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 50 [2022-07-14 06:10:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 25 proven. 106 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:10:56,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379444322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:10:56,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:10:56,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 23] total 41 [2022-07-14 06:10:56,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645819735] [2022-07-14 06:10:56,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:10:56,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-14 06:10:56,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:10:56,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-14 06:10:56,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1441, Unknown=1, NotChecked=76, Total=1640 [2022-07-14 06:10:56,180 INFO L87 Difference]: Start difference. First operand 1566 states and 1787 transitions. Second operand has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:56,798 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_main_~nondetString2~0#1.offset| Int) (|ULTIMATE.start_main_~nondetString2~0#1.base| Int) (|ULTIMATE.start_main_~length2~0#1| Int)) (= (select (select (store |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base| (store (select |c_#memory_int| |ULTIMATE.start_main_~nondetString2~0#1.base|) (+ (- 1) |ULTIMATE.start_main_~nondetString2~0#1.offset| |ULTIMATE.start_main_~length2~0#1|) 0)) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (<= |c_ULTIMATE.start_main_~i~0#1| 4) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~length1~0#1| 5) (<= 5 |c_ULTIMATE.start_main_~length1~0#1|)) is different from false [2022-07-14 06:10:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:10:57,189 INFO L93 Difference]: Finished difference Result 1541 states and 1750 transitions. [2022-07-14 06:10:57,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:10:57,189 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 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 93 [2022-07-14 06:10:57,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:10:57,192 INFO L225 Difference]: With dead ends: 1541 [2022-07-14 06:10:57,192 INFO L226 Difference]: Without dead ends: 1399 [2022-07-14 06:10:57,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 7 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 2 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=234, Invalid=2528, Unknown=2, NotChecked=206, Total=2970 [2022-07-14 06:10:57,193 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 94 mSDsluCounter, 876 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:10:57,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 927 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1150 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-07-14 06:10:57,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2022-07-14 06:10:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1392. [2022-07-14 06:10:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1389 states have (on average 1.144708423326134) internal successors, (1590), 1391 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:57,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 1590 transitions. [2022-07-14 06:10:57,211 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 1590 transitions. Word has length 93 [2022-07-14 06:10:57,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:10:57,211 INFO L495 AbstractCegarLoop]: Abstraction has 1392 states and 1590 transitions. [2022-07-14 06:10:57,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.5365853658536586) internal successors, (145), 41 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:10:57,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 1590 transitions. [2022-07-14 06:10:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-14 06:10:57,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:10:57,213 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:10:57,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-14 06:10:57,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-14 06:10:57,420 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:10:57,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:10:57,421 INFO L85 PathProgramCache]: Analyzing trace with hash -993374287, now seen corresponding path program 15 times [2022-07-14 06:10:57,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:10:57,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530052944] [2022-07-14 06:10:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:10:57,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:10:57,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:10:57,820 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 25 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:10:57,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:10:57,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530052944] [2022-07-14 06:10:57,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530052944] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:10:57,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246915959] [2022-07-14 06:10:57,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:10:57,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:10:57,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:10:57,840 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:10:57,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-14 06:10:58,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-14 06:10:58,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:10:58,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-14 06:10:58,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:10:58,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:10:58,288 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:10:58,329 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:10:58,890 INFO L356 Elim1Store]: treesize reduction 3, result has 91.9 percent of original size [2022-07-14 06:10:58,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 32 treesize of output 47 [2022-07-14 06:10:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 15 proven. 110 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:10:59,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:10:59,946 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1933 (Array Int Int)) (|ULTIMATE.start_substring_~pt~0#1.base| Int) (|v_ULTIMATE.start_substring_~ps2~0#1.offset_246| Int) (|ULTIMATE.start_substring_~pt~0#1.offset| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1933))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |v_ULTIMATE.start_substring_~ps2~0#1.offset_246|))) (not (<= 0 |v_ULTIMATE.start_substring_~ps2~0#1.offset_246|)) (<= (+ 2 |v_ULTIMATE.start_substring_~ps2~0#1.offset_246|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (< (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|) |v_ULTIMATE.start_substring_~ps2~0#1.offset_246|) (= .cse0 0))))) is different from false [2022-07-14 06:10:59,956 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:59,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2022-07-14 06:10:59,968 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:59,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 112 [2022-07-14 06:10:59,976 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:10:59,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-07-14 06:10:59,981 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:11:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 28 proven. 97 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:11:00,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246915959] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:00,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:00,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21, 21] total 67 [2022-07-14 06:11:00,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650901282] [2022-07-14 06:11:00,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:00,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-14 06:11:00,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:00,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-14 06:11:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=3978, Unknown=1, NotChecked=128, Total=4422 [2022-07-14 06:11:00,534 INFO L87 Difference]: Start difference. First operand 1392 states and 1590 transitions. Second operand has 67 states, 67 states have (on average 3.5671641791044775) internal successors, (239), 67 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:03,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:03,241 INFO L93 Difference]: Finished difference Result 1524 states and 1726 transitions. [2022-07-14 06:11:03,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-14 06:11:03,241 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.5671641791044775) internal successors, (239), 67 states have internal predecessors, (239), 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 93 [2022-07-14 06:11:03,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:03,249 INFO L225 Difference]: With dead ends: 1524 [2022-07-14 06:11:03,249 INFO L226 Difference]: Without dead ends: 1460 [2022-07-14 06:11:03,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 150 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1854, Invalid=19611, Unknown=1, NotChecked=290, Total=21756 [2022-07-14 06:11:03,251 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 111 mSDsluCounter, 631 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:03,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 653 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 936 Invalid, 0 Unknown, 275 Unchecked, 0.2s Time] [2022-07-14 06:11:03,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2022-07-14 06:11:03,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1392. [2022-07-14 06:11:03,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1389 states have (on average 1.1454283657307416) internal successors, (1591), 1391 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 1591 transitions. [2022-07-14 06:11:03,259 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 1591 transitions. Word has length 93 [2022-07-14 06:11:03,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:03,259 INFO L495 AbstractCegarLoop]: Abstraction has 1392 states and 1591 transitions. [2022-07-14 06:11:03,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.5671641791044775) internal successors, (239), 67 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:03,260 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 1591 transitions. [2022-07-14 06:11:03,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-14 06:11:03,261 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:03,261 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:03,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:03,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-07-14 06:11:03,473 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:03,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:03,473 INFO L85 PathProgramCache]: Analyzing trace with hash -219946528, now seen corresponding path program 7 times [2022-07-14 06:11:03,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:03,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703645627] [2022-07-14 06:11:03,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:03,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:03,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:03,860 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 25 proven. 163 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:11:03,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:03,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703645627] [2022-07-14 06:11:03,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703645627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:03,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647486905] [2022-07-14 06:11:03,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:11:03,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:03,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:03,862 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:03,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-14 06:11:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:03,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-14 06:11:03,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:03,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:11:04,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:11:04,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:11:04,459 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:11:04,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-07-14 06:11:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:11:04,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:04,619 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1996 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1996) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:11:04,623 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:04,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:11:04,627 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:04,627 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:11:04,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:11:04,834 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 25 proven. 98 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:11:04,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647486905] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:04,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:04,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 49 [2022-07-14 06:11:04,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209494757] [2022-07-14 06:11:04,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:04,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-14 06:11:04,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:04,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-14 06:11:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2094, Unknown=1, NotChecked=92, Total=2352 [2022-07-14 06:11:04,836 INFO L87 Difference]: Start difference. First operand 1392 states and 1591 transitions. Second operand has 49 states, 49 states have (on average 3.122448979591837) internal successors, (153), 49 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:05,910 INFO L93 Difference]: Finished difference Result 1401 states and 1594 transitions. [2022-07-14 06:11:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-14 06:11:05,910 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.122448979591837) internal successors, (153), 49 states have internal predecessors, (153), 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 93 [2022-07-14 06:11:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:05,912 INFO L225 Difference]: With dead ends: 1401 [2022-07-14 06:11:05,912 INFO L226 Difference]: Without dead ends: 1401 [2022-07-14 06:11:05,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 6 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 3 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=459, Invalid=4946, Unknown=1, NotChecked=144, Total=5550 [2022-07-14 06:11:05,913 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 215 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 1847 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 1188 SdHoareTripleChecker+Invalid, 2168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:05,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 1188 Invalid, 2168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1847 Invalid, 0 Unknown, 283 Unchecked, 0.5s Time] [2022-07-14 06:11:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-07-14 06:11:05,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1340. [2022-07-14 06:11:05,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1340 states, 1337 states have (on average 1.1451009723261032) internal successors, (1531), 1339 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:05,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1340 states to 1340 states and 1531 transitions. [2022-07-14 06:11:05,921 INFO L78 Accepts]: Start accepts. Automaton has 1340 states and 1531 transitions. Word has length 93 [2022-07-14 06:11:05,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:05,921 INFO L495 AbstractCegarLoop]: Abstraction has 1340 states and 1531 transitions. [2022-07-14 06:11:05,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.122448979591837) internal successors, (153), 49 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:05,922 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states and 1531 transitions. [2022-07-14 06:11:05,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-14 06:11:05,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:05,923 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:05,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:06,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-07-14 06:11:06,139 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:06,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash 2095756590, now seen corresponding path program 16 times [2022-07-14 06:11:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:06,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483091603] [2022-07-14 06:11:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:06,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:06,342 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 15 proven. 143 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:11:06,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:06,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483091603] [2022-07-14 06:11:06,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483091603] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:06,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519016538] [2022-07-14 06:11:06,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:11:06,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:06,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:06,344 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:06,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-14 06:11:06,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:11:06,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:06,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-14 06:11:06,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:06,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:11:06,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:11:07,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:11:07,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:11:07,038 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-14 06:11:07,631 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-14 06:11:07,631 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 51 [2022-07-14 06:11:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 32 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:11:07,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:08,457 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_substring_~pt~0#1.base| Int) (|ULTIMATE.start_substring_~pt~0#1.offset| Int) (|v_ULTIMATE.start_substring_~ps~0#1.offset_159| Int) (v_ArrVal_2052 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2052))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_substring_~pt~0#1.base|) |ULTIMATE.start_substring_~pt~0#1.offset|))) (or (not (= .cse0 (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_159| 4)))) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_substring_~ps~0#1.offset_159|) (<= (+ |v_ULTIMATE.start_substring_~ps~0#1.offset_159| 6) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (<= 0 |v_ULTIMATE.start_substring_~ps~0#1.offset_159|)) (= .cse0 0))))) is different from false [2022-07-14 06:11:08,467 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:08,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-07-14 06:11:08,481 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:08,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 111 treesize of output 120 [2022-07-14 06:11:08,489 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:08,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 64 [2022-07-14 06:11:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 45 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:11:10,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519016538] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:10,036 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:10,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 28, 28] total 69 [2022-07-14 06:11:10,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322839078] [2022-07-14 06:11:10,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:10,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-14 06:11:10,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:10,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-14 06:11:10,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=4303, Unknown=1, NotChecked=134, Total=4830 [2022-07-14 06:11:10,037 INFO L87 Difference]: Start difference. First operand 1340 states and 1531 transitions. Second operand has 70 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 70 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:14,029 INFO L93 Difference]: Finished difference Result 1678 states and 1888 transitions. [2022-07-14 06:11:14,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-14 06:11:14,030 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 70 states have internal predecessors, (275), 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 97 [2022-07-14 06:11:14,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:14,031 INFO L225 Difference]: With dead ends: 1678 [2022-07-14 06:11:14,031 INFO L226 Difference]: Without dead ends: 1678 [2022-07-14 06:11:14,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 153 SyntacticMatches, 16 SemanticMatches, 129 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4274 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1846, Invalid=14911, Unknown=17, NotChecked=256, Total=17030 [2022-07-14 06:11:14,032 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 382 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 966 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1156 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:14,032 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 966 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 662 Invalid, 0 Unknown, 1156 Unchecked, 0.2s Time] [2022-07-14 06:11:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2022-07-14 06:11:14,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1476. [2022-07-14 06:11:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1473 states have (on average 1.1391717583163612) internal successors, (1678), 1475 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:14,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 1678 transitions. [2022-07-14 06:11:14,048 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 1678 transitions. Word has length 97 [2022-07-14 06:11:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:14,048 INFO L495 AbstractCegarLoop]: Abstraction has 1476 states and 1678 transitions. [2022-07-14 06:11:14,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 3.9855072463768115) internal successors, (275), 70 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:14,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 1678 transitions. [2022-07-14 06:11:14,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-14 06:11:14,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:14,050 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:14,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:14,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:14,268 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:14,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:14,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1262854493, now seen corresponding path program 17 times [2022-07-14 06:11:14,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:14,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970623118] [2022-07-14 06:11:14,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:14,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 15 proven. 133 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:11:14,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:14,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970623118] [2022-07-14 06:11:14,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970623118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:14,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640400235] [2022-07-14 06:11:14,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:11:14,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:14,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:14,390 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:14,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-14 06:11:14,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 06:11:14,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:14,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:11:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:14,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:11:14,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:11:14,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:11:14,917 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 28 proven. 120 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:11:14,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 45 proven. 103 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:11:15,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640400235] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:15,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:15,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2022-07-14 06:11:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506380514] [2022-07-14 06:11:15,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:15,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-14 06:11:15,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:15,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-14 06:11:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2022-07-14 06:11:15,291 INFO L87 Difference]: Start difference. First operand 1476 states and 1678 transitions. Second operand has 40 states, 39 states have (on average 6.0256410256410255) internal successors, (235), 40 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:16,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:16,265 INFO L93 Difference]: Finished difference Result 1588 states and 1779 transitions. [2022-07-14 06:11:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-14 06:11:16,265 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 6.0256410256410255) internal successors, (235), 40 states have internal predecessors, (235), 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 97 [2022-07-14 06:11:16,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:16,266 INFO L225 Difference]: With dead ends: 1588 [2022-07-14 06:11:16,266 INFO L226 Difference]: Without dead ends: 1588 [2022-07-14 06:11:16,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=918, Invalid=3504, Unknown=0, NotChecked=0, Total=4422 [2022-07-14 06:11:16,267 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 905 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 1310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:16,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [905 Valid, 606 Invalid, 1310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:11:16,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-07-14 06:11:16,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1476. [2022-07-14 06:11:16,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1473 states have (on average 1.1371350984385609) internal successors, (1675), 1475 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 1675 transitions. [2022-07-14 06:11:16,276 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 1675 transitions. Word has length 97 [2022-07-14 06:11:16,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:16,276 INFO L495 AbstractCegarLoop]: Abstraction has 1476 states and 1675 transitions. [2022-07-14 06:11:16,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 6.0256410256410255) internal successors, (235), 40 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 1675 transitions. [2022-07-14 06:11:16,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-14 06:11:16,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:16,278 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:16,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:16,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-14 06:11:16,495 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:16,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:16,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1415254045, now seen corresponding path program 8 times [2022-07-14 06:11:16,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:16,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222438863] [2022-07-14 06:11:16,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:16,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:16,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 15 proven. 125 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:11:16,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:16,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222438863] [2022-07-14 06:11:16,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222438863] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:16,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821415963] [2022-07-14 06:11:16,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:11:16,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:16,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:16,669 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:16,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-14 06:11:16,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:11:16,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:16,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:11:16,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:11:17,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:17,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:11:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 28 proven. 112 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:11:17,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821415963] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:17,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:17,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 34 [2022-07-14 06:11:17,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343821855] [2022-07-14 06:11:17,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:17,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-14 06:11:17,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:17,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-14 06:11:17,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2022-07-14 06:11:17,203 INFO L87 Difference]: Start difference. First operand 1476 states and 1675 transitions. Second operand has 35 states, 34 states have (on average 4.764705882352941) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:17,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:17,619 INFO L93 Difference]: Finished difference Result 1522 states and 1718 transitions. [2022-07-14 06:11:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:11:17,619 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 4.764705882352941) internal successors, (162), 35 states have internal predecessors, (162), 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 97 [2022-07-14 06:11:17,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:17,621 INFO L225 Difference]: With dead ends: 1522 [2022-07-14 06:11:17,621 INFO L226 Difference]: Without dead ends: 1522 [2022-07-14 06:11:17,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=584, Invalid=2172, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 06:11:17,621 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 596 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:17,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 525 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-14 06:11:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-07-14 06:11:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1480. [2022-07-14 06:11:17,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1480 states, 1477 states have (on average 1.1367637102234258) internal successors, (1679), 1479 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:17,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1480 states to 1480 states and 1679 transitions. [2022-07-14 06:11:17,630 INFO L78 Accepts]: Start accepts. Automaton has 1480 states and 1679 transitions. Word has length 97 [2022-07-14 06:11:17,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:17,630 INFO L495 AbstractCegarLoop]: Abstraction has 1480 states and 1679 transitions. [2022-07-14 06:11:17,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 4.764705882352941) internal successors, (162), 35 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 1480 states and 1679 transitions. [2022-07-14 06:11:17,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-14 06:11:17,631 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:17,632 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:17,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-14 06:11:17,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:17,849 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:17,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:17,849 INFO L85 PathProgramCache]: Analyzing trace with hash -437416829, now seen corresponding path program 18 times [2022-07-14 06:11:17,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:17,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327699687] [2022-07-14 06:11:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:17,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:17,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 173 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:11:18,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327699687] [2022-07-14 06:11:18,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327699687] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:18,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952419779] [2022-07-14 06:11:18,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:11:18,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:18,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:18,187 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:18,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-14 06:11:18,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-14 06:11:18,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:18,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 66 conjunts are in the unsatisfiable core [2022-07-14 06:11:18,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:18,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:11:18,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:11:18,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:11:19,000 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:11:19,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-07-14 06:11:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 128 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-14 06:11:19,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:19,175 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2229 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2229) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 4 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:11:19,178 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:19,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:11:19,183 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:19,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:11:19,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:11:19,433 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 30 proven. 128 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-14 06:11:19,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952419779] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:19,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:19,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 47 [2022-07-14 06:11:19,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282997254] [2022-07-14 06:11:19,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:19,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-14 06:11:19,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:19,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-14 06:11:19,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1916, Unknown=1, NotChecked=88, Total=2162 [2022-07-14 06:11:19,434 INFO L87 Difference]: Start difference. First operand 1480 states and 1679 transitions. Second operand has 47 states, 47 states have (on average 3.404255319148936) internal successors, (160), 47 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:20,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:20,441 INFO L93 Difference]: Finished difference Result 1471 states and 1666 transitions. [2022-07-14 06:11:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-14 06:11:20,442 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.404255319148936) internal successors, (160), 47 states have internal predecessors, (160), 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 100 [2022-07-14 06:11:20,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:20,443 INFO L225 Difference]: With dead ends: 1471 [2022-07-14 06:11:20,443 INFO L226 Difference]: Without dead ends: 1374 [2022-07-14 06:11:20,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 175 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 1065 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=377, Invalid=4182, Unknown=1, NotChecked=132, Total=4692 [2022-07-14 06:11:20,444 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 156 mSDsluCounter, 1063 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:20,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1112 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1751 Invalid, 0 Unknown, 267 Unchecked, 0.5s Time] [2022-07-14 06:11:20,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2022-07-14 06:11:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1371. [2022-07-14 06:11:20,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 1368 states have (on average 1.141812865497076) internal successors, (1562), 1370 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:20,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 1562 transitions. [2022-07-14 06:11:20,452 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 1562 transitions. Word has length 100 [2022-07-14 06:11:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:20,452 INFO L495 AbstractCegarLoop]: Abstraction has 1371 states and 1562 transitions. [2022-07-14 06:11:20,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.404255319148936) internal successors, (160), 47 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 1562 transitions. [2022-07-14 06:11:20,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-14 06:11:20,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:20,453 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:20,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:20,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:20,670 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:20,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:20,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1647941571, now seen corresponding path program 19 times [2022-07-14 06:11:20,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:20,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149096898] [2022-07-14 06:11:20,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:20,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:11:20,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:20,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149096898] [2022-07-14 06:11:20,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149096898] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:20,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529726750] [2022-07-14 06:11:20,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:11:20,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:20,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:20,826 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:20,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-14 06:11:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:21,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-14 06:11:21,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:21,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:11:21,027 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:11:21,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:11:21,457 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 28 proven. 147 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:11:21,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:21,864 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 45 proven. 130 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:11:21,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529726750] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:21,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:21,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-07-14 06:11:21,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032856790] [2022-07-14 06:11:21,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:21,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-14 06:11:21,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:21,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-14 06:11:21,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2022-07-14 06:11:21,866 INFO L87 Difference]: Start difference. First operand 1371 states and 1562 transitions. Second operand has 43 states, 42 states have (on average 5.428571428571429) internal successors, (228), 43 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:22,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:22,694 INFO L93 Difference]: Finished difference Result 1461 states and 1648 transitions. [2022-07-14 06:11:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:11:22,695 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 5.428571428571429) internal successors, (228), 43 states have internal predecessors, (228), 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 100 [2022-07-14 06:11:22,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:22,696 INFO L225 Difference]: With dead ends: 1461 [2022-07-14 06:11:22,696 INFO L226 Difference]: Without dead ends: 1461 [2022-07-14 06:11:22,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1061, Invalid=4051, Unknown=0, NotChecked=0, Total=5112 [2022-07-14 06:11:22,697 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 914 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:22,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 544 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:11:22,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1461 states. [2022-07-14 06:11:22,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1461 to 1349. [2022-07-14 06:11:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1346 states have (on average 1.1411589895988112) internal successors, (1536), 1348 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 1536 transitions. [2022-07-14 06:11:22,706 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 1536 transitions. Word has length 100 [2022-07-14 06:11:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:22,706 INFO L495 AbstractCegarLoop]: Abstraction has 1349 states and 1536 transitions. [2022-07-14 06:11:22,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 5.428571428571429) internal successors, (228), 43 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:22,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 1536 transitions. [2022-07-14 06:11:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-14 06:11:22,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:22,707 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:22,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:22,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2022-07-14 06:11:22,925 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:22,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:22,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1860717283, now seen corresponding path program 9 times [2022-07-14 06:11:22,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:22,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307350592] [2022-07-14 06:11:22,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:22,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:23,088 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 28 proven. 149 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:11:23,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:23,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307350592] [2022-07-14 06:11:23,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307350592] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:23,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424656416] [2022-07-14 06:11:23,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:11:23,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:23,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:23,104 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:23,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-14 06:11:23,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-14 06:11:23,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:23,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-14 06:11:23,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:23,366 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:11:23,366 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:11:23,694 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:11:23,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 66 proven. 111 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:11:24,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424656416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:24,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:24,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 52 [2022-07-14 06:11:24,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991526378] [2022-07-14 06:11:24,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:24,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-14 06:11:24,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:24,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-14 06:11:24,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=2380, Unknown=0, NotChecked=0, Total=2756 [2022-07-14 06:11:24,136 INFO L87 Difference]: Start difference. First operand 1349 states and 1536 transitions. Second operand has 53 states, 52 states have (on average 4.6923076923076925) internal successors, (244), 53 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:25,200 INFO L93 Difference]: Finished difference Result 1842 states and 2087 transitions. [2022-07-14 06:11:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-14 06:11:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 4.6923076923076925) internal successors, (244), 53 states have internal predecessors, (244), 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 100 [2022-07-14 06:11:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:25,202 INFO L225 Difference]: With dead ends: 1842 [2022-07-14 06:11:25,202 INFO L226 Difference]: Without dead ends: 1842 [2022-07-14 06:11:25,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1039, Invalid=4073, Unknown=0, NotChecked=0, Total=5112 [2022-07-14 06:11:25,204 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 722 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 722 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 2448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:25,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [722 Valid, 1131 Invalid, 2448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:11:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1842 states. [2022-07-14 06:11:25,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1842 to 1625. [2022-07-14 06:11:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1625 states, 1622 states have (on average 1.1559802712700369) internal successors, (1875), 1624 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 1875 transitions. [2022-07-14 06:11:25,214 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 1875 transitions. Word has length 100 [2022-07-14 06:11:25,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:25,214 INFO L495 AbstractCegarLoop]: Abstraction has 1625 states and 1875 transitions. [2022-07-14 06:11:25,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 4.6923076923076925) internal successors, (244), 53 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 1875 transitions. [2022-07-14 06:11:25,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-14 06:11:25,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:25,216 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:25,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:25,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:25,428 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:25,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:25,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1943791869, now seen corresponding path program 3 times [2022-07-14 06:11:25,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:25,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688645121] [2022-07-14 06:11:25,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:25,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:25,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 7 proven. 215 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:11:26,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:26,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688645121] [2022-07-14 06:11:26,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688645121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:26,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567883798] [2022-07-14 06:11:26,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:11:26,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:26,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:26,061 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:26,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-14 06:11:26,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-14 06:11:26,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:26,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-14 06:11:26,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:26,295 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:11:26,540 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:11:26,574 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:11:26,923 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:11:26,923 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 23 [2022-07-14 06:11:26,948 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 7 proven. 194 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-14 06:11:26,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:27,077 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2409 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2409) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)))) is different from false [2022-07-14 06:11:27,088 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:27,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:11:27,091 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:27,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:11:27,093 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:11:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 7 proven. 187 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:11:27,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567883798] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:27,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:27,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 26, 25] total 53 [2022-07-14 06:11:27,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520561453] [2022-07-14 06:11:27,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:27,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-14 06:11:27,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:27,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-14 06:11:27,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2508, Unknown=1, NotChecked=100, Total=2756 [2022-07-14 06:11:27,312 INFO L87 Difference]: Start difference. First operand 1625 states and 1875 transitions. Second operand has 53 states, 53 states have (on average 3.2641509433962264) internal successors, (173), 53 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:29,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:29,149 INFO L93 Difference]: Finished difference Result 3267 states and 3752 transitions. [2022-07-14 06:11:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-14 06:11:29,149 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.2641509433962264) internal successors, (173), 53 states have internal predecessors, (173), 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 103 [2022-07-14 06:11:29,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:29,152 INFO L225 Difference]: With dead ends: 3267 [2022-07-14 06:11:29,152 INFO L226 Difference]: Without dead ends: 3267 [2022-07-14 06:11:29,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 180 SyntacticMatches, 8 SemanticMatches, 87 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=724, Invalid=6935, Unknown=1, NotChecked=172, Total=7832 [2022-07-14 06:11:29,153 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 518 mSDsluCounter, 1286 mSDsCounter, 0 mSdLazyCounter, 2292 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 2689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 321 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:29,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1327 Invalid, 2689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2292 Invalid, 0 Unknown, 321 Unchecked, 0.6s Time] [2022-07-14 06:11:29,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3267 states. [2022-07-14 06:11:29,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3267 to 1862. [2022-07-14 06:11:29,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1862 states, 1859 states have (on average 1.1527703066164605) internal successors, (2143), 1861 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:29,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2143 transitions. [2022-07-14 06:11:29,169 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2143 transitions. Word has length 103 [2022-07-14 06:11:29,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:29,169 INFO L495 AbstractCegarLoop]: Abstraction has 1862 states and 2143 transitions. [2022-07-14 06:11:29,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.2641509433962264) internal successors, (173), 53 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2143 transitions. [2022-07-14 06:11:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-14 06:11:29,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:29,170 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:29,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:29,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-07-14 06:11:29,383 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:29,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:29,384 INFO L85 PathProgramCache]: Analyzing trace with hash -817121690, now seen corresponding path program 20 times [2022-07-14 06:11:29,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:29,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958744958] [2022-07-14 06:11:29,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:29,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 15 proven. 176 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:11:29,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:29,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958744958] [2022-07-14 06:11:29,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958744958] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:29,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828919916] [2022-07-14 06:11:29,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:11:29,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:29,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:29,540 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:29,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-14 06:11:29,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:11:29,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:29,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-14 06:11:29,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:29,749 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:11:29,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:11:30,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:11:30,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:11:30,974 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:30,974 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2022-07-14 06:11:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 28 proven. 178 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:11:31,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:31,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-07-14 06:11:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 45 proven. 161 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:11:32,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828919916] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:32,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:32,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 23] total 58 [2022-07-14 06:11:32,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840577051] [2022-07-14 06:11:32,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:32,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-14 06:11:32,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:32,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-14 06:11:32,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=3137, Unknown=0, NotChecked=0, Total=3422 [2022-07-14 06:11:32,029 INFO L87 Difference]: Start difference. First operand 1862 states and 2143 transitions. Second operand has 59 states, 58 states have (on average 4.793103448275862) internal successors, (278), 59 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:36,562 INFO L93 Difference]: Finished difference Result 2131 states and 2403 transitions. [2022-07-14 06:11:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-07-14 06:11:36,562 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.793103448275862) internal successors, (278), 59 states have internal predecessors, (278), 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 104 [2022-07-14 06:11:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:36,564 INFO L225 Difference]: With dead ends: 2131 [2022-07-14 06:11:36,564 INFO L226 Difference]: Without dead ends: 2131 [2022-07-14 06:11:36,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3113, Invalid=18939, Unknown=0, NotChecked=0, Total=22052 [2022-07-14 06:11:36,566 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 4166 mSDsluCounter, 2119 mSDsCounter, 0 mSdLazyCounter, 3310 mSolverCounterSat, 901 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4166 SdHoareTripleChecker+Valid, 2207 SdHoareTripleChecker+Invalid, 5159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 901 IncrementalHoareTripleChecker+Valid, 3310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 948 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:36,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4166 Valid, 2207 Invalid, 5159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [901 Valid, 3310 Invalid, 0 Unknown, 948 Unchecked, 1.3s Time] [2022-07-14 06:11:36,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2022-07-14 06:11:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 1790. [2022-07-14 06:11:36,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1790 states, 1787 states have (on average 1.153329602686066) internal successors, (2061), 1789 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:36,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1790 states to 1790 states and 2061 transitions. [2022-07-14 06:11:36,577 INFO L78 Accepts]: Start accepts. Automaton has 1790 states and 2061 transitions. Word has length 104 [2022-07-14 06:11:36,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:36,577 INFO L495 AbstractCegarLoop]: Abstraction has 1790 states and 2061 transitions. [2022-07-14 06:11:36,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.793103448275862) internal successors, (278), 59 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:36,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1790 states and 2061 transitions. [2022-07-14 06:11:36,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-14 06:11:36,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:36,578 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:36,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-14 06:11:36,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:36,780 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:36,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:36,780 INFO L85 PathProgramCache]: Analyzing trace with hash 779219134, now seen corresponding path program 21 times [2022-07-14 06:11:36,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:36,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942973190] [2022-07-14 06:11:36,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:36,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:36,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:36,946 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 15 proven. 176 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:11:36,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:36,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942973190] [2022-07-14 06:11:36,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942973190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:36,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650355600] [2022-07-14 06:11:36,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:11:36,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:36,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:36,955 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:36,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-14 06:11:37,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-14 06:11:37,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:37,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 103 conjunts are in the unsatisfiable core [2022-07-14 06:11:37,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:37,185 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:11:37,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:11:37,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:11:37,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:11:37,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-07-14 06:11:38,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:11:38,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:11:38,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:11:38,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:11:38,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:11:38,736 INFO L356 Elim1Store]: treesize reduction 4, result has 81.0 percent of original size [2022-07-14 06:11:38,736 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 51 treesize of output 37 [2022-07-14 06:11:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 17 proven. 161 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:11:38,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:41,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:11:41,888 INFO L356 Elim1Store]: treesize reduction 18, result has 41.9 percent of original size [2022-07-14 06:11:41,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 497 treesize of output 450 [2022-07-14 06:11:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-14 06:11:43,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650355600] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:43,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:43,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 26, 27] total 66 [2022-07-14 06:11:43,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969050643] [2022-07-14 06:11:43,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:43,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-14 06:11:43,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:43,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-14 06:11:43,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=4064, Unknown=1, NotChecked=0, Total=4422 [2022-07-14 06:11:43,692 INFO L87 Difference]: Start difference. First operand 1790 states and 2061 transitions. Second operand has 67 states, 66 states have (on average 3.8636363636363638) internal successors, (255), 67 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:50,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:50,171 INFO L93 Difference]: Finished difference Result 2412 states and 2742 transitions. [2022-07-14 06:11:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-07-14 06:11:50,172 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.8636363636363638) internal successors, (255), 67 states have internal predecessors, (255), 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 104 [2022-07-14 06:11:50,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:50,174 INFO L225 Difference]: With dead ends: 2412 [2022-07-14 06:11:50,174 INFO L226 Difference]: Without dead ends: 2412 [2022-07-14 06:11:50,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7173 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=2407, Invalid=23674, Unknown=1, NotChecked=0, Total=26082 [2022-07-14 06:11:50,176 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 503 mSDsluCounter, 1251 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 2091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 862 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:50,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [503 Valid, 1305 Invalid, 2091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1138 Invalid, 0 Unknown, 862 Unchecked, 0.5s Time] [2022-07-14 06:11:50,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2412 states. [2022-07-14 06:11:50,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2412 to 1938. [2022-07-14 06:11:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1935 states have (on average 1.1488372093023256) internal successors, (2223), 1937 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:50,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 2223 transitions. [2022-07-14 06:11:50,223 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 2223 transitions. Word has length 104 [2022-07-14 06:11:50,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:50,223 INFO L495 AbstractCegarLoop]: Abstraction has 1938 states and 2223 transitions. [2022-07-14 06:11:50,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.8636363636363638) internal successors, (255), 67 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:50,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 2223 transitions. [2022-07-14 06:11:50,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-14 06:11:50,225 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:50,225 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:50,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-14 06:11:50,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:50,426 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:11:50,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:11:50,426 INFO L85 PathProgramCache]: Analyzing trace with hash -535539866, now seen corresponding path program 22 times [2022-07-14 06:11:50,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:11:50,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269323808] [2022-07-14 06:11:50,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:11:50,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:11:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:11:50,677 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 15 proven. 176 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:11:50,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:11:50,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269323808] [2022-07-14 06:11:50,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269323808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:11:50,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952655291] [2022-07-14 06:11:50,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:11:50,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:11:50,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:11:50,678 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:11:50,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-14 06:11:50,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:11:50,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:11:50,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-14 06:11:50,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:11:50,954 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:11:50,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:11:50,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:11:51,243 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:11:51,269 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-14 06:11:51,919 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-14 06:11:51,919 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 51 [2022-07-14 06:11:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 32 proven. 159 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:11:52,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:11:53,283 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:53,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 42 [2022-07-14 06:11:53,301 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:53,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 111 treesize of output 120 [2022-07-14 06:11:53,311 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:11:53,312 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 64 [2022-07-14 06:11:55,123 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 45 proven. 146 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:11:55,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952655291] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:11:55,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:11:55,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 23, 23] total 59 [2022-07-14 06:11:55,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542393400] [2022-07-14 06:11:55,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:11:55,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-14 06:11:55,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:11:55,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-14 06:11:55,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=3208, Unknown=20, NotChecked=0, Total=3540 [2022-07-14 06:11:55,126 INFO L87 Difference]: Start difference. First operand 1938 states and 2223 transitions. Second operand has 60 states, 59 states have (on average 4.440677966101695) internal successors, (262), 60 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:59,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:11:59,778 INFO L93 Difference]: Finished difference Result 3254 states and 3693 transitions. [2022-07-14 06:11:59,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-14 06:11:59,778 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 4.440677966101695) internal successors, (262), 60 states have internal predecessors, (262), 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 104 [2022-07-14 06:11:59,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:11:59,782 INFO L225 Difference]: With dead ends: 3254 [2022-07-14 06:11:59,782 INFO L226 Difference]: Without dead ends: 3254 [2022-07-14 06:11:59,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 183 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3713 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1620, Invalid=14090, Unknown=40, NotChecked=0, Total=15750 [2022-07-14 06:11:59,792 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 292 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 2299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1077 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:11:59,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 886 Invalid, 2299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1161 Invalid, 0 Unknown, 1077 Unchecked, 0.5s Time] [2022-07-14 06:11:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3254 states. [2022-07-14 06:11:59,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3254 to 2766. [2022-07-14 06:11:59,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2766 states, 2763 states have (on average 1.1433224755700326) internal successors, (3159), 2765 states have internal predecessors, (3159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 3159 transitions. [2022-07-14 06:11:59,836 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 3159 transitions. Word has length 104 [2022-07-14 06:11:59,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:11:59,836 INFO L495 AbstractCegarLoop]: Abstraction has 2766 states and 3159 transitions. [2022-07-14 06:11:59,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 4.440677966101695) internal successors, (262), 60 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:11:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 3159 transitions. [2022-07-14 06:11:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-14 06:11:59,850 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:11:59,850 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:11:59,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:00,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:00,068 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:12:00,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:00,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1745896785, now seen corresponding path program 23 times [2022-07-14 06:12:00,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:00,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517955422] [2022-07-14 06:12:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:00,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 30 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:12:01,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:01,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517955422] [2022-07-14 06:12:01,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517955422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:01,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500194146] [2022-07-14 06:12:01,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:12:01,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:01,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:01,009 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:01,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-14 06:12:01,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 06:12:01,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:01,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 06:12:01,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:01,454 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:12:01,967 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-14 06:12:01,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-14 06:12:02,002 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 06:12:02,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:02,318 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:12:02,319 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:12:02,553 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 12 proven. 144 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-14 06:12:02,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500194146] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:02,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:02,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 18, 18] total 56 [2022-07-14 06:12:02,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139571023] [2022-07-14 06:12:02,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:02,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-14 06:12:02,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:02,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-14 06:12:02,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2924, Unknown=0, NotChecked=0, Total=3080 [2022-07-14 06:12:02,554 INFO L87 Difference]: Start difference. First operand 2766 states and 3159 transitions. Second operand has 56 states, 56 states have (on average 3.9642857142857144) internal successors, (222), 56 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:06,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:06,180 INFO L93 Difference]: Finished difference Result 3825 states and 4291 transitions. [2022-07-14 06:12:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-14 06:12:06,180 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.9642857142857144) internal successors, (222), 56 states have internal predecessors, (222), 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 104 [2022-07-14 06:12:06,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:06,184 INFO L225 Difference]: With dead ends: 3825 [2022-07-14 06:12:06,184 INFO L226 Difference]: Without dead ends: 3813 [2022-07-14 06:12:06,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 179 SyntacticMatches, 10 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 7 DeprecatedPredicates, 2167 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=647, Invalid=9453, Unknown=0, NotChecked=0, Total=10100 [2022-07-14 06:12:06,192 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 476 mSDsluCounter, 3326 mSDsCounter, 0 mSdLazyCounter, 3989 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 3432 SdHoareTripleChecker+Invalid, 4365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 3989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:06,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 3432 Invalid, 4365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 3989 Invalid, 0 Unknown, 330 Unchecked, 1.5s Time] [2022-07-14 06:12:06,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3813 states. [2022-07-14 06:12:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3813 to 2928. [2022-07-14 06:12:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2925 states have (on average 1.1429059829059829) internal successors, (3343), 2927 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:06,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 3343 transitions. [2022-07-14 06:12:06,224 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 3343 transitions. Word has length 104 [2022-07-14 06:12:06,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:06,225 INFO L495 AbstractCegarLoop]: Abstraction has 2928 states and 3343 transitions. [2022-07-14 06:12:06,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.9642857142857144) internal successors, (222), 56 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:06,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 3343 transitions. [2022-07-14 06:12:06,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-14 06:12:06,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:06,227 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:06,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:06,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:06,446 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:12:06,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:06,446 INFO L85 PathProgramCache]: Analyzing trace with hash -633722519, now seen corresponding path program 9 times [2022-07-14 06:12:06,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:06,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877886224] [2022-07-14 06:12:06,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:06,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 25 proven. 206 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:12:07,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:07,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877886224] [2022-07-14 06:12:07,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877886224] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:07,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715071240] [2022-07-14 06:12:07,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:12:07,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:07,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:07,027 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:07,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-14 06:12:07,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-14 06:12:07,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:07,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-14 06:12:07,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:07,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:12:07,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:12:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 12 proven. 189 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:12:07,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:07,858 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:12:07,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:12:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 12 proven. 189 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:12:08,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715071240] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:08,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:08,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 22] total 43 [2022-07-14 06:12:08,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843895217] [2022-07-14 06:12:08,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:08,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-14 06:12:08,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:08,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-14 06:12:08,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1673, Unknown=0, NotChecked=0, Total=1806 [2022-07-14 06:12:08,038 INFO L87 Difference]: Start difference. First operand 2928 states and 3343 transitions. Second operand has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:10,211 INFO L93 Difference]: Finished difference Result 3734 states and 4216 transitions. [2022-07-14 06:12:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-14 06:12:10,211 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 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 104 [2022-07-14 06:12:10,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:10,225 INFO L225 Difference]: With dead ends: 3734 [2022-07-14 06:12:10,225 INFO L226 Difference]: Without dead ends: 3707 [2022-07-14 06:12:10,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 188 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=661, Invalid=5039, Unknown=0, NotChecked=0, Total=5700 [2022-07-14 06:12:10,235 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 1404 mSDsluCounter, 2270 mSDsCounter, 0 mSdLazyCounter, 2371 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1404 SdHoareTripleChecker+Valid, 2394 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:10,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1404 Valid, 2394 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2371 Invalid, 0 Unknown, 200 Unchecked, 0.9s Time] [2022-07-14 06:12:10,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3707 states. [2022-07-14 06:12:10,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3707 to 3518. [2022-07-14 06:12:10,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 3515 states have (on average 1.1428165007112376) internal successors, (4017), 3517 states have internal predecessors, (4017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:10,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 4017 transitions. [2022-07-14 06:12:10,273 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 4017 transitions. Word has length 104 [2022-07-14 06:12:10,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:10,273 INFO L495 AbstractCegarLoop]: Abstraction has 3518 states and 4017 transitions. [2022-07-14 06:12:10,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 4017 transitions. [2022-07-14 06:12:10,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-14 06:12:10,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:10,289 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:10,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:10,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-07-14 06:12:10,503 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:12:10,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:10,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1463300938, now seen corresponding path program 11 times [2022-07-14 06:12:10,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:10,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489772046] [2022-07-14 06:12:10,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:10,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:10,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 51 proven. 165 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:12:10,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:10,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489772046] [2022-07-14 06:12:10,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489772046] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:10,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006306751] [2022-07-14 06:12:10,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:12:10,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:10,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:10,976 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:10,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-14 06:12:11,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-14 06:12:11,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:11,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-14 06:12:11,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:11,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:12:11,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:12:11,532 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:12:11,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:12:11,811 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 51 proven. 165 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:12:11,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:11,889 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2747 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2747) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:12:11,891 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:11,892 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:12:11,895 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:11,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:12:11,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:12:12,120 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 51 proven. 165 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:12:12,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006306751] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:12,121 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:12,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19, 19] total 49 [2022-07-14 06:12:12,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184706607] [2022-07-14 06:12:12,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:12,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-14 06:12:12,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:12,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-14 06:12:12,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2120, Unknown=1, NotChecked=92, Total=2352 [2022-07-14 06:12:12,122 INFO L87 Difference]: Start difference. First operand 3518 states and 4017 transitions. Second operand has 49 states, 49 states have (on average 4.6938775510204085) internal successors, (230), 49 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:12,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:12,718 INFO L93 Difference]: Finished difference Result 5754 states and 6508 transitions. [2022-07-14 06:12:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-14 06:12:12,718 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.6938775510204085) internal successors, (230), 49 states have internal predecessors, (230), 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 106 [2022-07-14 06:12:12,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:12,722 INFO L225 Difference]: With dead ends: 5754 [2022-07-14 06:12:12,722 INFO L226 Difference]: Without dead ends: 5433 [2022-07-14 06:12:12,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=198, Invalid=2885, Unknown=1, NotChecked=108, Total=3192 [2022-07-14 06:12:12,723 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 108 mSDsluCounter, 1434 mSDsCounter, 0 mSdLazyCounter, 1874 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 1874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:12,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1484 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 1874 Invalid, 0 Unknown, 109 Unchecked, 0.4s Time] [2022-07-14 06:12:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5433 states. [2022-07-14 06:12:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5433 to 4784. [2022-07-14 06:12:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4784 states, 4781 states have (on average 1.1340723697971136) internal successors, (5422), 4783 states have internal predecessors, (5422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4784 states to 4784 states and 5422 transitions. [2022-07-14 06:12:12,758 INFO L78 Accepts]: Start accepts. Automaton has 4784 states and 5422 transitions. Word has length 106 [2022-07-14 06:12:12,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:12,758 INFO L495 AbstractCegarLoop]: Abstraction has 4784 states and 5422 transitions. [2022-07-14 06:12:12,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.6938775510204085) internal successors, (230), 49 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:12,758 INFO L276 IsEmpty]: Start isEmpty. Operand 4784 states and 5422 transitions. [2022-07-14 06:12:12,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-14 06:12:12,761 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:12,761 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:12,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:12,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2022-07-14 06:12:12,975 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:12:12,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:12,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1209646406, now seen corresponding path program 4 times [2022-07-14 06:12:12,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:12,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302523252] [2022-07-14 06:12:12,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:12,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:13,286 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 31 proven. 209 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-14 06:12:13,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:13,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302523252] [2022-07-14 06:12:13,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302523252] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:13,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139377623] [2022-07-14 06:12:13,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:12:13,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:13,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:13,288 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:13,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-14 06:12:13,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:12:13,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:13,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-14 06:12:13,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:13,440 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:12:13,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:12:13,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:12:14,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:12:14,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-07-14 06:12:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 77 proven. 98 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-14 06:12:14,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:14,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2022-07-14 06:12:14,391 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-07-14 06:12:14,781 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 70 proven. 105 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-14 06:12:14,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139377623] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:14,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:14,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 54 [2022-07-14 06:12:14,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995464382] [2022-07-14 06:12:14,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:14,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-14 06:12:14,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:14,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-14 06:12:14,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2632, Unknown=0, NotChecked=0, Total=2862 [2022-07-14 06:12:14,783 INFO L87 Difference]: Start difference. First operand 4784 states and 5422 transitions. Second operand has 54 states, 54 states have (on average 4.407407407407407) internal successors, (238), 54 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:16,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:16,164 INFO L93 Difference]: Finished difference Result 4873 states and 5477 transitions. [2022-07-14 06:12:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-14 06:12:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 4.407407407407407) internal successors, (238), 54 states have internal predecessors, (238), 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 107 [2022-07-14 06:12:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:16,168 INFO L225 Difference]: With dead ends: 4873 [2022-07-14 06:12:16,168 INFO L226 Difference]: Without dead ends: 4838 [2022-07-14 06:12:16,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=839, Invalid=7533, Unknown=0, NotChecked=0, Total=8372 [2022-07-14 06:12:16,169 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 160 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:16,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 1110 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 851 Invalid, 0 Unknown, 168 Unchecked, 0.2s Time] [2022-07-14 06:12:16,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4838 states. [2022-07-14 06:12:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4838 to 4409. [2022-07-14 06:12:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4409 states, 4406 states have (on average 1.129822968679074) internal successors, (4978), 4408 states have internal predecessors, (4978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4409 states to 4409 states and 4978 transitions. [2022-07-14 06:12:16,198 INFO L78 Accepts]: Start accepts. Automaton has 4409 states and 4978 transitions. Word has length 107 [2022-07-14 06:12:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:16,198 INFO L495 AbstractCegarLoop]: Abstraction has 4409 states and 4978 transitions. [2022-07-14 06:12:16,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 4.407407407407407) internal successors, (238), 54 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:16,199 INFO L276 IsEmpty]: Start isEmpty. Operand 4409 states and 4978 transitions. [2022-07-14 06:12:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-14 06:12:16,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:16,201 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:16,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-07-14 06:12:16,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:16,412 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:12:16,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:16,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1171943820, now seen corresponding path program 24 times [2022-07-14 06:12:16,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:16,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896843339] [2022-07-14 06:12:16,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:16,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 30 proven. 158 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:12:16,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:16,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896843339] [2022-07-14 06:12:16,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896843339] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:16,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791040468] [2022-07-14 06:12:16,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:12:16,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:16,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:16,946 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:16,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-14 06:12:17,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-14 06:12:17,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:17,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 131 conjunts are in the unsatisfiable core [2022-07-14 06:12:17,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:17,205 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:12:17,209 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:12:18,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 37 treesize of output 27 [2022-07-14 06:12:18,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:12:18,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:12:19,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:12:19,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-07-14 06:12:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 30 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:12:19,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:19,721 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2873 (Array Int Int))) (let ((.cse0 (select v_ArrVal_2873 (+ 3 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|)))) (or (= .cse0 0) (not (= .cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_2873) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|))))))) is different from false [2022-07-14 06:12:19,727 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:19,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 29 [2022-07-14 06:12:19,754 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:19,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-07-14 06:12:19,761 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:19,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-07-14 06:12:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 233 backedges. 30 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-14 06:12:21,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791040468] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:21,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:21,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 32, 33] total 85 [2022-07-14 06:12:21,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604106618] [2022-07-14 06:12:21,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:21,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-07-14 06:12:21,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:21,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-07-14 06:12:21,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=6532, Unknown=1, NotChecked=164, Total=7140 [2022-07-14 06:12:21,027 INFO L87 Difference]: Start difference. First operand 4409 states and 4978 transitions. Second operand has 85 states, 85 states have (on average 3.3529411764705883) internal successors, (285), 85 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:25,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:25,460 INFO L93 Difference]: Finished difference Result 4406 states and 4955 transitions. [2022-07-14 06:12:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-14 06:12:25,461 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.3529411764705883) internal successors, (285), 85 states have internal predecessors, (285), 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 108 [2022-07-14 06:12:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:25,464 INFO L225 Difference]: With dead ends: 4406 [2022-07-14 06:12:25,464 INFO L226 Difference]: Without dead ends: 4406 [2022-07-14 06:12:25,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3927 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1389, Invalid=13866, Unknown=1, NotChecked=244, Total=15500 [2022-07-14 06:12:25,466 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 480 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1854 SdHoareTripleChecker+Invalid, 4736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2272 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:25,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 1854 Invalid, 4736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2406 Invalid, 0 Unknown, 2272 Unchecked, 0.9s Time] [2022-07-14 06:12:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4406 states. [2022-07-14 06:12:25,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4406 to 4330. [2022-07-14 06:12:25,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 4327 states have (on average 1.1271088513981973) internal successors, (4877), 4329 states have internal predecessors, (4877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:25,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 4877 transitions. [2022-07-14 06:12:25,502 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 4877 transitions. Word has length 108 [2022-07-14 06:12:25,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:25,527 INFO L495 AbstractCegarLoop]: Abstraction has 4330 states and 4877 transitions. [2022-07-14 06:12:25,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.3529411764705883) internal successors, (285), 85 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:25,528 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 4877 transitions. [2022-07-14 06:12:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-14 06:12:25,530 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:25,531 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:25,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:25,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:25,750 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:12:25,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:25,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2010849210, now seen corresponding path program 10 times [2022-07-14 06:12:25,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:25,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816668361] [2022-07-14 06:12:25,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:25,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 30 proven. 240 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:12:26,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:26,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816668361] [2022-07-14 06:12:26,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816668361] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:26,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269966796] [2022-07-14 06:12:26,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:12:26,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:26,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:26,670 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:26,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-14 06:12:26,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:12:26,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:26,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-14 06:12:26,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:26,977 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:12:26,980 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:12:27,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:12:27,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-07-14 06:12:28,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:12:28,461 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-14 06:12:28,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 23 [2022-07-14 06:12:28,498 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 125 proven. 55 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:12:28,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:29,467 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:29,468 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2022-07-14 06:12:29,484 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:29,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 112 [2022-07-14 06:12:29,493 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:29,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-07-14 06:12:30,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:12:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 80 proven. 100 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:12:30,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269966796] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:30,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:30,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25, 25] total 73 [2022-07-14 06:12:30,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693080579] [2022-07-14 06:12:30,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:30,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-14 06:12:30,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:30,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-14 06:12:30,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=4896, Unknown=4, NotChecked=0, Total=5256 [2022-07-14 06:12:30,619 INFO L87 Difference]: Start difference. First operand 4330 states and 4877 transitions. Second operand has 73 states, 73 states have (on average 3.493150684931507) internal successors, (255), 73 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:32,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:32,651 INFO L93 Difference]: Finished difference Result 4524 states and 5076 transitions. [2022-07-14 06:12:32,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-14 06:12:32,652 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.493150684931507) internal successors, (255), 73 states have internal predecessors, (255), 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 108 [2022-07-14 06:12:32,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:32,655 INFO L225 Difference]: With dead ends: 4524 [2022-07-14 06:12:32,655 INFO L226 Difference]: Without dead ends: 4524 [2022-07-14 06:12:32,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 186 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=888, Invalid=10450, Unknown=4, NotChecked=0, Total=11342 [2022-07-14 06:12:32,656 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 295 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1910 SdHoareTripleChecker+Invalid, 3278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1671 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:32,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1910 Invalid, 3278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1573 Invalid, 0 Unknown, 1671 Unchecked, 0.6s Time] [2022-07-14 06:12:32,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4524 states. [2022-07-14 06:12:32,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4524 to 4322. [2022-07-14 06:12:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4319 states have (on average 1.1264181523500811) internal successors, (4865), 4321 states have internal predecessors, (4865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:32,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 4865 transitions. [2022-07-14 06:12:32,692 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 4865 transitions. Word has length 108 [2022-07-14 06:12:32,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:32,692 INFO L495 AbstractCegarLoop]: Abstraction has 4322 states and 4865 transitions. [2022-07-14 06:12:32,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.493150684931507) internal successors, (255), 73 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:32,693 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 4865 transitions. [2022-07-14 06:12:32,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-14 06:12:32,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:32,696 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:32,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:32,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:32,914 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:12:32,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:32,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1723286055, now seen corresponding path program 12 times [2022-07-14 06:12:32,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:32,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548556404] [2022-07-14 06:12:32,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:32,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:33,146 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 28 proven. 209 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:12:33,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:33,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548556404] [2022-07-14 06:12:33,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548556404] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:33,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026895454] [2022-07-14 06:12:33,146 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:12:33,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:33,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:33,148 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:33,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-14 06:12:33,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-14 06:12:33,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:33,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-14 06:12:33,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:33,789 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 45 proven. 192 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:12:33,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:34,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:12:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 66 proven. 171 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:12:34,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026895454] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:34,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:34,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 43 [2022-07-14 06:12:34,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009166105] [2022-07-14 06:12:34,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:34,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-14 06:12:34,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:34,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-14 06:12:34,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2022-07-14 06:12:34,417 INFO L87 Difference]: Start difference. First operand 4322 states and 4865 transitions. Second operand has 44 states, 43 states have (on average 6.534883720930233) internal successors, (281), 44 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:35,367 INFO L93 Difference]: Finished difference Result 5028 states and 5670 transitions. [2022-07-14 06:12:35,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-14 06:12:35,368 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 6.534883720930233) internal successors, (281), 44 states have internal predecessors, (281), 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 110 [2022-07-14 06:12:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:35,372 INFO L225 Difference]: With dead ends: 5028 [2022-07-14 06:12:35,372 INFO L226 Difference]: Without dead ends: 5028 [2022-07-14 06:12:35,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=788, Invalid=2872, Unknown=0, NotChecked=0, Total=3660 [2022-07-14 06:12:35,372 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 1056 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1056 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:35,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1056 Valid, 593 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:12:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5028 states. [2022-07-14 06:12:35,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5028 to 4672. [2022-07-14 06:12:35,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4669 states have (on average 1.1304347826086956) internal successors, (5278), 4671 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 5278 transitions. [2022-07-14 06:12:35,408 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 5278 transitions. Word has length 110 [2022-07-14 06:12:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:35,408 INFO L495 AbstractCegarLoop]: Abstraction has 4672 states and 5278 transitions. [2022-07-14 06:12:35,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 6.534883720930233) internal successors, (281), 44 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 5278 transitions. [2022-07-14 06:12:35,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-14 06:12:35,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:35,412 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:35,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:35,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:35,627 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:12:35,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:35,627 INFO L85 PathProgramCache]: Analyzing trace with hash -68855594, now seen corresponding path program 25 times [2022-07-14 06:12:35,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:35,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169517261] [2022-07-14 06:12:35,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:35,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 15 proven. 216 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-14 06:12:35,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:35,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169517261] [2022-07-14 06:12:35,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169517261] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:35,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531222110] [2022-07-14 06:12:35,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:12:35,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:35,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:35,818 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:35,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-14 06:12:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:36,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-14 06:12:36,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:36,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:12:36,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:12:36,030 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:12:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 28 proven. 203 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-14 06:12:36,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:37,044 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 45 proven. 186 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-14 06:12:37,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531222110] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:37,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:37,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 42 [2022-07-14 06:12:37,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613020823] [2022-07-14 06:12:37,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:37,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-14 06:12:37,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:37,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-14 06:12:37,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-07-14 06:12:37,047 INFO L87 Difference]: Start difference. First operand 4672 states and 5278 transitions. Second operand has 43 states, 42 states have (on average 6.095238095238095) internal successors, (256), 43 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:38,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:38,456 INFO L93 Difference]: Finished difference Result 5056 states and 5652 transitions. [2022-07-14 06:12:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:12:38,457 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 6.095238095238095) internal successors, (256), 43 states have internal predecessors, (256), 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 111 [2022-07-14 06:12:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:38,461 INFO L225 Difference]: With dead ends: 5056 [2022-07-14 06:12:38,461 INFO L226 Difference]: Without dead ends: 5056 [2022-07-14 06:12:38,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 193 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 873 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1024, Invalid=4088, Unknown=0, NotChecked=0, Total=5112 [2022-07-14 06:12:38,461 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 1701 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1701 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:38,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1701 Valid, 584 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 1237 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-14 06:12:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5056 states. [2022-07-14 06:12:38,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5056 to 4601. [2022-07-14 06:12:38,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 4598 states have (on average 1.1309264897781643) internal successors, (5200), 4600 states have internal predecessors, (5200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:38,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 5200 transitions. [2022-07-14 06:12:38,495 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 5200 transitions. Word has length 111 [2022-07-14 06:12:38,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:38,495 INFO L495 AbstractCegarLoop]: Abstraction has 4601 states and 5200 transitions. [2022-07-14 06:12:38,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 6.095238095238095) internal successors, (256), 43 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:38,496 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 5200 transitions. [2022-07-14 06:12:38,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-14 06:12:38,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:38,499 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:38,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:38,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-07-14 06:12:38,716 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:12:38,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:38,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1746153090, now seen corresponding path program 26 times [2022-07-14 06:12:38,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:38,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139254069] [2022-07-14 06:12:38,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:38,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:39,455 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 28 proven. 223 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:12:39,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:39,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139254069] [2022-07-14 06:12:39,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139254069] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:39,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400354719] [2022-07-14 06:12:39,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:12:39,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:39,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:39,457 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:39,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-14 06:12:39,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:12:39,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:39,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 06:12:39,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:39,972 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 206 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:12:39,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:40,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:12:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 45 proven. 206 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-14 06:12:40,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400354719] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:40,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:40,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 37 [2022-07-14 06:12:40,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100489102] [2022-07-14 06:12:40,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:40,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-14 06:12:40,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:40,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-14 06:12:40,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1245, Unknown=0, NotChecked=0, Total=1406 [2022-07-14 06:12:40,352 INFO L87 Difference]: Start difference. First operand 4601 states and 5200 transitions. Second operand has 38 states, 37 states have (on average 6.108108108108108) internal successors, (226), 38 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:41,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:41,441 INFO L93 Difference]: Finished difference Result 4745 states and 5318 transitions. [2022-07-14 06:12:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-14 06:12:41,442 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 6.108108108108108) internal successors, (226), 38 states have internal predecessors, (226), 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 112 [2022-07-14 06:12:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:41,445 INFO L225 Difference]: With dead ends: 4745 [2022-07-14 06:12:41,445 INFO L226 Difference]: Without dead ends: 4745 [2022-07-14 06:12:41,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 201 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=850, Invalid=3182, Unknown=0, NotChecked=0, Total=4032 [2022-07-14 06:12:41,446 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 906 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 906 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:41,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [906 Valid, 666 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:12:41,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4745 states. [2022-07-14 06:12:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4745 to 4601. [2022-07-14 06:12:41,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 4598 states have (on average 1.1283166594171379) internal successors, (5188), 4600 states have internal predecessors, (5188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 5188 transitions. [2022-07-14 06:12:41,476 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 5188 transitions. Word has length 112 [2022-07-14 06:12:41,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:41,476 INFO L495 AbstractCegarLoop]: Abstraction has 4601 states and 5188 transitions. [2022-07-14 06:12:41,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 6.108108108108108) internal successors, (226), 38 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:41,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 5188 transitions. [2022-07-14 06:12:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-14 06:12:41,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:41,479 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:41,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:41,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:41,698 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:12:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:41,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1909538089, now seen corresponding path program 27 times [2022-07-14 06:12:41,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:41,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510149295] [2022-07-14 06:12:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:41,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:41,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 28 proven. 181 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-14 06:12:41,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:41,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510149295] [2022-07-14 06:12:41,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510149295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:41,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902548617] [2022-07-14 06:12:41,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:12:41,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:41,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:41,924 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:41,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-14 06:12:42,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-14 06:12:42,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:42,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-14 06:12:42,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:42,187 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:12:42,190 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:12:42,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:12:42,382 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-14 06:12:42,612 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-14 06:12:42,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 51 [2022-07-14 06:12:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 12 proven. 92 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-07-14 06:12:42,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:43,730 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:43,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2022-07-14 06:12:43,746 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:43,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 112 [2022-07-14 06:12:43,756 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:43,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-07-14 06:12:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 254 backedges. 0 proven. 104 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-07-14 06:12:44,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902548617] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:44,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:44,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 41 [2022-07-14 06:12:44,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976687467] [2022-07-14 06:12:44,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:44,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:12:44,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:44,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:12:44,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1571, Unknown=10, NotChecked=0, Total=1722 [2022-07-14 06:12:44,459 INFO L87 Difference]: Start difference. First operand 4601 states and 5188 transitions. Second operand has 42 states, 41 states have (on average 4.585365853658536) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:47,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:47,788 INFO L93 Difference]: Finished difference Result 6243 states and 6980 transitions. [2022-07-14 06:12:47,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-14 06:12:47,789 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.585365853658536) internal successors, (188), 42 states have internal predecessors, (188), 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 112 [2022-07-14 06:12:47,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:47,792 INFO L225 Difference]: With dead ends: 6243 [2022-07-14 06:12:47,792 INFO L226 Difference]: Without dead ends: 6153 [2022-07-14 06:12:47,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 198 SyntacticMatches, 7 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3428 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1592, Invalid=12203, Unknown=11, NotChecked=0, Total=13806 [2022-07-14 06:12:47,793 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 184 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 445 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:47,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 412 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1239 Invalid, 0 Unknown, 445 Unchecked, 0.5s Time] [2022-07-14 06:12:47,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6153 states. [2022-07-14 06:12:47,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6153 to 5634. [2022-07-14 06:12:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5634 states, 5631 states have (on average 1.123779080092346) internal successors, (6328), 5633 states have internal predecessors, (6328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:47,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5634 states to 5634 states and 6328 transitions. [2022-07-14 06:12:47,878 INFO L78 Accepts]: Start accepts. Automaton has 5634 states and 6328 transitions. Word has length 112 [2022-07-14 06:12:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:47,878 INFO L495 AbstractCegarLoop]: Abstraction has 5634 states and 6328 transitions. [2022-07-14 06:12:47,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.585365853658536) internal successors, (188), 42 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 5634 states and 6328 transitions. [2022-07-14 06:12:47,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-14 06:12:47,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:47,883 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:47,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:48,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-07-14 06:12:48,102 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:12:48,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:48,103 INFO L85 PathProgramCache]: Analyzing trace with hash -770060734, now seen corresponding path program 28 times [2022-07-14 06:12:48,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:48,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735203658] [2022-07-14 06:12:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:48,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 35 proven. 217 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:12:48,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735203658] [2022-07-14 06:12:48,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735203658] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:48,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556905406] [2022-07-14 06:12:48,482 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:12:48,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:48,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:48,487 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:48,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-14 06:12:48,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:12:48,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:48,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-14 06:12:48,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:48,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:12:48,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:12:49,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:12:49,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:12:53,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:12:53,999 INFO L356 Elim1Store]: treesize reduction 2, result has 86.7 percent of original size [2022-07-14 06:12:53,999 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 27 [2022-07-14 06:12:54,003 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:12:54,040 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 135 proven. 124 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-14 06:12:54,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:12:54,910 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:54,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2022-07-14 06:12:54,921 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:54,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 112 [2022-07-14 06:12:54,950 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:12:54,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-07-14 06:12:55,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:12:55,887 INFO L134 CoverageAnalysis]: Checked inductivity of 274 backedges. 130 proven. 122 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:12:55,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556905406] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:12:55,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:12:55,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 66 [2022-07-14 06:12:55,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102890643] [2022-07-14 06:12:55,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:12:55,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-14 06:12:55,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:12:55,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-14 06:12:55,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=4006, Unknown=1, NotChecked=0, Total=4290 [2022-07-14 06:12:55,889 INFO L87 Difference]: Start difference. First operand 5634 states and 6328 transitions. Second operand has 66 states, 66 states have (on average 4.363636363636363) internal successors, (288), 66 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:57,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:12:57,518 INFO L93 Difference]: Finished difference Result 5645 states and 6313 transitions. [2022-07-14 06:12:57,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-14 06:12:57,519 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 4.363636363636363) internal successors, (288), 66 states have internal predecessors, (288), 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 115 [2022-07-14 06:12:57,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:12:57,522 INFO L225 Difference]: With dead ends: 5645 [2022-07-14 06:12:57,522 INFO L226 Difference]: Without dead ends: 5080 [2022-07-14 06:12:57,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 199 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1910 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=762, Invalid=8939, Unknown=1, NotChecked=0, Total=9702 [2022-07-14 06:12:57,525 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 233 mSDsluCounter, 1364 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 2246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1465 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-14 06:12:57,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 1419 Invalid, 2246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 766 Invalid, 0 Unknown, 1465 Unchecked, 0.2s Time] [2022-07-14 06:12:57,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5080 states. [2022-07-14 06:12:57,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5080 to 4960. [2022-07-14 06:12:57,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4957 states have (on average 1.1234617712326003) internal successors, (5569), 4959 states have internal predecessors, (5569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:57,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 5569 transitions. [2022-07-14 06:12:57,582 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 5569 transitions. Word has length 115 [2022-07-14 06:12:57,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:12:57,583 INFO L495 AbstractCegarLoop]: Abstraction has 4960 states and 5569 transitions. [2022-07-14 06:12:57,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 4.363636363636363) internal successors, (288), 66 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:12:57,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 5569 transitions. [2022-07-14 06:12:57,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-14 06:12:57,585 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:12:57,586 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:12:57,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-07-14 06:12:57,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-07-14 06:12:57,795 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:12:57,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:12:57,796 INFO L85 PathProgramCache]: Analyzing trace with hash 987947017, now seen corresponding path program 29 times [2022-07-14 06:12:57,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:12:57,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465561326] [2022-07-14 06:12:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:12:57,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:12:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:12:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 35 proven. 231 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:12:58,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:12:58,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465561326] [2022-07-14 06:12:58,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465561326] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:12:58,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587596616] [2022-07-14 06:12:58,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:12:58,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:12:58,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:12:58,508 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:12:58,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-14 06:12:58,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-14 06:12:58,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:12:58,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 115 conjunts are in the unsatisfiable core [2022-07-14 06:12:58,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:12:58,771 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:12:58,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:12:59,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:12:59,474 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-14 06:12:59,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:12:59,597 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-14 06:12:59,598 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-07-14 06:12:59,662 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-14 06:13:00,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:13:00,801 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 14 [2022-07-14 06:13:00,871 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 35 proven. 231 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:13:00,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:02,375 INFO L356 Elim1Store]: treesize reduction 189, result has 35.5 percent of original size [2022-07-14 06:13:02,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 5573 treesize of output 2857 [2022-07-14 06:13:02,390 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:02,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2857 treesize of output 2727 [2022-07-14 06:13:02,716 INFO L356 Elim1Store]: treesize reduction 10, result has 23.1 percent of original size [2022-07-14 06:13:02,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2022-07-14 06:13:02,752 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:02,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 150 treesize of output 158 [2022-07-14 06:13:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 35 proven. 231 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-14 06:13:04,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587596616] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:04,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:04,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 34] total 88 [2022-07-14 06:13:04,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427575355] [2022-07-14 06:13:04,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:04,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-07-14 06:13:04,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:04,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-07-14 06:13:04,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=7252, Unknown=0, NotChecked=0, Total=7656 [2022-07-14 06:13:04,815 INFO L87 Difference]: Start difference. First operand 4960 states and 5569 transitions. Second operand has 88 states, 88 states have (on average 3.4431818181818183) internal successors, (303), 88 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:10,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:10,557 INFO L93 Difference]: Finished difference Result 4894 states and 5487 transitions. [2022-07-14 06:13:10,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-14 06:13:10,558 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.4431818181818183) internal successors, (303), 88 states have internal predecessors, (303), 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 115 [2022-07-14 06:13:10,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:10,561 INFO L225 Difference]: With dead ends: 4894 [2022-07-14 06:13:10,561 INFO L226 Difference]: Without dead ends: 4110 [2022-07-14 06:13:10,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 177 SyntacticMatches, 8 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4809 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1160, Invalid=18022, Unknown=0, NotChecked=0, Total=19182 [2022-07-14 06:13:10,562 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 830 mSDsluCounter, 1723 mSDsCounter, 0 mSdLazyCounter, 2517 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1767 SdHoareTripleChecker+Invalid, 4099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1480 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:10,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 1767 Invalid, 4099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2517 Invalid, 0 Unknown, 1480 Unchecked, 1.1s Time] [2022-07-14 06:13:10,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2022-07-14 06:13:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 4107. [2022-07-14 06:13:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4107 states, 4104 states have (on average 1.1335282651072125) internal successors, (4652), 4106 states have internal predecessors, (4652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:10,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4107 states to 4107 states and 4652 transitions. [2022-07-14 06:13:10,583 INFO L78 Accepts]: Start accepts. Automaton has 4107 states and 4652 transitions. Word has length 115 [2022-07-14 06:13:10,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:10,583 INFO L495 AbstractCegarLoop]: Abstraction has 4107 states and 4652 transitions. [2022-07-14 06:13:10,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.4431818181818183) internal successors, (303), 88 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:10,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4107 states and 4652 transitions. [2022-07-14 06:13:10,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-14 06:13:10,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:10,589 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:10,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:10,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-07-14 06:13:10,808 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:10,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:10,808 INFO L85 PathProgramCache]: Analyzing trace with hash 675387599, now seen corresponding path program 30 times [2022-07-14 06:13:10,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:10,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099631676] [2022-07-14 06:13:10,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:10,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 28 proven. 215 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-14 06:13:11,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:11,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099631676] [2022-07-14 06:13:11,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099631676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:11,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248342198] [2022-07-14 06:13:11,014 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:13:11,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:11,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:11,016 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:11,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-14 06:13:11,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-14 06:13:11,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:13:11,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 502 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-14 06:13:11,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:11,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:13:11,843 INFO L356 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2022-07-14 06:13:11,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 10 [2022-07-14 06:13:11,875 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 14 proven. 206 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-14 06:13:11,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:12,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:13:12,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:13:12,167 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 14 proven. 206 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-14 06:13:12,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248342198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:12,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:12,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 46 [2022-07-14 06:13:12,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622347373] [2022-07-14 06:13:12,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:12,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-14 06:13:12,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:12,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-14 06:13:12,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1947, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 06:13:12,169 INFO L87 Difference]: Start difference. First operand 4107 states and 4652 transitions. Second operand has 46 states, 46 states have (on average 5.065217391304348) internal successors, (233), 46 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:15,564 INFO L93 Difference]: Finished difference Result 4169 states and 4665 transitions. [2022-07-14 06:13:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-14 06:13:15,565 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.065217391304348) internal successors, (233), 46 states have internal predecessors, (233), 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 115 [2022-07-14 06:13:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:15,568 INFO L225 Difference]: With dead ends: 4169 [2022-07-14 06:13:15,568 INFO L226 Difference]: Without dead ends: 4145 [2022-07-14 06:13:15,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 198 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 4761 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1235, Invalid=16057, Unknown=0, NotChecked=0, Total=17292 [2022-07-14 06:13:15,570 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1728 mSDsluCounter, 3215 mSDsCounter, 0 mSdLazyCounter, 4629 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 3356 SdHoareTripleChecker+Invalid, 5505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 4629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:15,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 3356 Invalid, 5505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 4629 Invalid, 0 Unknown, 697 Unchecked, 1.3s Time] [2022-07-14 06:13:15,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4145 states. [2022-07-14 06:13:15,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4145 to 3972. [2022-07-14 06:13:15,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3969 states have (on average 1.127739984882842) internal successors, (4476), 3971 states have internal predecessors, (4476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 4476 transitions. [2022-07-14 06:13:15,636 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 4476 transitions. Word has length 115 [2022-07-14 06:13:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:15,636 INFO L495 AbstractCegarLoop]: Abstraction has 3972 states and 4476 transitions. [2022-07-14 06:13:15,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.065217391304348) internal successors, (233), 46 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 4476 transitions. [2022-07-14 06:13:15,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-14 06:13:15,638 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:15,638 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:15,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-07-14 06:13:15,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:15,857 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:15,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:15,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1613237987, now seen corresponding path program 10 times [2022-07-14 06:13:15,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:15,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503640682] [2022-07-14 06:13:15,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:15,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:15,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:16,085 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 45 proven. 200 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:13:16,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:16,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503640682] [2022-07-14 06:13:16,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503640682] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:16,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903925930] [2022-07-14 06:13:16,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:13:16,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:16,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:16,088 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:16,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-14 06:13:16,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:13:16,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:13:16,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-14 06:13:16,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:16,363 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:13:16,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:13:16,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:13:17,242 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:17,242 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2022-07-14 06:13:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 72 proven. 173 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:13:17,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:18,150 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-14 06:13:18,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-07-14 06:13:18,949 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 91 proven. 154 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:13:18,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903925930] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:18,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:18,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 24] total 65 [2022-07-14 06:13:18,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928931112] [2022-07-14 06:13:18,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:18,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-14 06:13:18,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:18,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-14 06:13:18,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=3867, Unknown=0, NotChecked=0, Total=4290 [2022-07-14 06:13:18,952 INFO L87 Difference]: Start difference. First operand 3972 states and 4476 transitions. Second operand has 66 states, 65 states have (on average 4.2615384615384615) internal successors, (277), 66 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:21,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:21,722 INFO L93 Difference]: Finished difference Result 4051 states and 4547 transitions. [2022-07-14 06:13:21,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-14 06:13:21,722 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 4.2615384615384615) internal successors, (277), 66 states have internal predecessors, (277), 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 115 [2022-07-14 06:13:21,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:21,725 INFO L225 Difference]: With dead ends: 4051 [2022-07-14 06:13:21,725 INFO L226 Difference]: Without dead ends: 4051 [2022-07-14 06:13:21,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1477 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1996, Invalid=8716, Unknown=0, NotChecked=0, Total=10712 [2022-07-14 06:13:21,727 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 789 mSDsluCounter, 2063 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 789 SdHoareTripleChecker+Valid, 2197 SdHoareTripleChecker+Invalid, 3984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:21,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [789 Valid, 2197 Invalid, 3984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3806 Invalid, 0 Unknown, 118 Unchecked, 1.3s Time] [2022-07-14 06:13:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2022-07-14 06:13:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3986. [2022-07-14 06:13:21,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3986 states, 3983 states have (on average 1.127793120763244) internal successors, (4492), 3985 states have internal predecessors, (4492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3986 states to 3986 states and 4492 transitions. [2022-07-14 06:13:21,751 INFO L78 Accepts]: Start accepts. Automaton has 3986 states and 4492 transitions. Word has length 115 [2022-07-14 06:13:21,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:21,751 INFO L495 AbstractCegarLoop]: Abstraction has 3986 states and 4492 transitions. [2022-07-14 06:13:21,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 4.2615384615384615) internal successors, (277), 66 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 3986 states and 4492 transitions. [2022-07-14 06:13:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-14 06:13:21,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:21,753 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:21,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:21,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:21,967 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:21,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:21,967 INFO L85 PathProgramCache]: Analyzing trace with hash 16289344, now seen corresponding path program 13 times [2022-07-14 06:13:21,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:21,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178641007] [2022-07-14 06:13:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:21,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:22,493 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 61 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:13:22,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:22,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178641007] [2022-07-14 06:13:22,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178641007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:22,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793821688] [2022-07-14 06:13:22,493 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:13:22,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:22,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:22,495 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:22,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-14 06:13:22,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:22,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 95 conjunts are in the unsatisfiable core [2022-07-14 06:13:22,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:22,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:13:23,034 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:13:23,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 23 [2022-07-14 06:13:23,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 3 [2022-07-14 06:13:25,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:13:25,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-14 06:13:25,189 INFO L356 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-07-14 06:13:25,189 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 18 [2022-07-14 06:13:25,192 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 61 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:13:25,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:25,591 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:25,613 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 36 [2022-07-14 06:13:25,629 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-14 06:13:25,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 62 treesize of output 61 [2022-07-14 06:13:25,644 INFO L356 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-07-14 06:13:25,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 33 treesize of output 41 [2022-07-14 06:13:26,095 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 61 proven. 243 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:13:26,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793821688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:26,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:26,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 65 [2022-07-14 06:13:26,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166527170] [2022-07-14 06:13:26,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:26,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-14 06:13:26,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:26,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-14 06:13:26,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=3937, Unknown=5, NotChecked=0, Total=4160 [2022-07-14 06:13:26,097 INFO L87 Difference]: Start difference. First operand 3986 states and 4492 transitions. Second operand has 65 states, 65 states have (on average 4.076923076923077) internal successors, (265), 65 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:26,792 INFO L93 Difference]: Finished difference Result 4520 states and 5063 transitions. [2022-07-14 06:13:26,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-14 06:13:26,792 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 4.076923076923077) internal successors, (265), 65 states have internal predecessors, (265), 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 117 [2022-07-14 06:13:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:26,796 INFO L225 Difference]: With dead ends: 4520 [2022-07-14 06:13:26,796 INFO L226 Difference]: Without dead ends: 4425 [2022-07-14 06:13:26,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1387 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=304, Invalid=5697, Unknown=5, NotChecked=0, Total=6006 [2022-07-14 06:13:26,797 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 65 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1340 SdHoareTripleChecker+Invalid, 1431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 538 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:26,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1340 Invalid, 1431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 882 Invalid, 0 Unknown, 538 Unchecked, 0.3s Time] [2022-07-14 06:13:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4425 states. [2022-07-14 06:13:26,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4425 to 4422. [2022-07-14 06:13:26,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4422 states, 4419 states have (on average 1.1235573659198914) internal successors, (4965), 4421 states have internal predecessors, (4965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4422 states to 4422 states and 4965 transitions. [2022-07-14 06:13:26,822 INFO L78 Accepts]: Start accepts. Automaton has 4422 states and 4965 transitions. Word has length 117 [2022-07-14 06:13:26,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:26,822 INFO L495 AbstractCegarLoop]: Abstraction has 4422 states and 4965 transitions. [2022-07-14 06:13:26,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 4.076923076923077) internal successors, (265), 65 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:26,822 INFO L276 IsEmpty]: Start isEmpty. Operand 4422 states and 4965 transitions. [2022-07-14 06:13:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-14 06:13:26,824 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:26,824 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:26,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:27,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:27,044 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:27,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:27,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1458493435, now seen corresponding path program 31 times [2022-07-14 06:13:27,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:27,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601867510] [2022-07-14 06:13:27,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:27,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 28 proven. 245 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:13:27,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:27,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601867510] [2022-07-14 06:13:27,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601867510] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:27,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101587503] [2022-07-14 06:13:27,282 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-14 06:13:27,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:27,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:27,284 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:27,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-14 06:13:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:27,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-14 06:13:27,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:27,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:13:27,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:13:27,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:13:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 45 proven. 228 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:13:28,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 66 proven. 207 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-14 06:13:28,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101587503] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:28,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:28,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-07-14 06:13:28,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070812007] [2022-07-14 06:13:28,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:28,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-14 06:13:28,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:28,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-14 06:13:28,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=2127, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 06:13:28,842 INFO L87 Difference]: Start difference. First operand 4422 states and 4965 transitions. Second operand has 49 states, 48 states have (on average 6.208333333333333) internal successors, (298), 49 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:30,193 INFO L93 Difference]: Finished difference Result 4679 states and 5208 transitions. [2022-07-14 06:13:30,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-14 06:13:30,193 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 6.208333333333333) internal successors, (298), 49 states have internal predecessors, (298), 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 119 [2022-07-14 06:13:30,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:30,196 INFO L225 Difference]: With dead ends: 4679 [2022-07-14 06:13:30,196 INFO L226 Difference]: Without dead ends: 4679 [2022-07-14 06:13:30,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1347, Invalid=5459, Unknown=0, NotChecked=0, Total=6806 [2022-07-14 06:13:30,197 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 1450 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1450 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:30,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1450 Valid, 630 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:13:30,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2022-07-14 06:13:30,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 4191. [2022-07-14 06:13:30,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 4188 states have (on average 1.1244030563514804) internal successors, (4709), 4190 states have internal predecessors, (4709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:30,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 4709 transitions. [2022-07-14 06:13:30,220 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 4709 transitions. Word has length 119 [2022-07-14 06:13:30,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:30,220 INFO L495 AbstractCegarLoop]: Abstraction has 4191 states and 4709 transitions. [2022-07-14 06:13:30,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 6.208333333333333) internal successors, (298), 49 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:30,221 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 4709 transitions. [2022-07-14 06:13:30,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-14 06:13:30,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:30,222 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:30,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:30,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:30,431 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:30,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:30,432 INFO L85 PathProgramCache]: Analyzing trace with hash 299514316, now seen corresponding path program 32 times [2022-07-14 06:13:30,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:30,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028363212] [2022-07-14 06:13:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:30,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 28 proven. 231 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:13:30,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:30,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028363212] [2022-07-14 06:13:30,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028363212] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:30,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067607396] [2022-07-14 06:13:30,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:13:30,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:30,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:30,597 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:30,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-14 06:13:30,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:13:30,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:13:30,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-14 06:13:30,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:30,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:13:30,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:13:30,839 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:13:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 45 proven. 214 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:13:31,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:31,751 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 66 proven. 193 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-07-14 06:13:31,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067607396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:31,752 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:31,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2022-07-14 06:13:31,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677324000] [2022-07-14 06:13:31,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:31,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-14 06:13:31,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:31,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-14 06:13:31,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2128, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 06:13:31,753 INFO L87 Difference]: Start difference. First operand 4191 states and 4709 transitions. Second operand has 49 states, 48 states have (on average 5.958333333333333) internal successors, (286), 49 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:33,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:33,062 INFO L93 Difference]: Finished difference Result 4510 states and 5017 transitions. [2022-07-14 06:13:33,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-14 06:13:33,063 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 5.958333333333333) internal successors, (286), 49 states have internal predecessors, (286), 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 119 [2022-07-14 06:13:33,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:33,066 INFO L225 Difference]: With dead ends: 4510 [2022-07-14 06:13:33,066 INFO L226 Difference]: Without dead ends: 4510 [2022-07-14 06:13:33,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1439, Invalid=5701, Unknown=0, NotChecked=0, Total=7140 [2022-07-14 06:13:33,067 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1326 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 639 SdHoareTripleChecker+Invalid, 1665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:33,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1326 Valid, 639 Invalid, 1665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-14 06:13:33,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2022-07-14 06:13:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4191. [2022-07-14 06:13:33,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 4188 states have (on average 1.1234479465138492) internal successors, (4705), 4190 states have internal predecessors, (4705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 4705 transitions. [2022-07-14 06:13:33,089 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 4705 transitions. Word has length 119 [2022-07-14 06:13:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:33,089 INFO L495 AbstractCegarLoop]: Abstraction has 4191 states and 4705 transitions. [2022-07-14 06:13:33,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 5.958333333333333) internal successors, (286), 49 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 4705 transitions. [2022-07-14 06:13:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-14 06:13:33,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:33,092 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:33,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:33,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-07-14 06:13:33,310 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:33,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:33,310 INFO L85 PathProgramCache]: Analyzing trace with hash -834729973, now seen corresponding path program 33 times [2022-07-14 06:13:33,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:33,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390892471] [2022-07-14 06:13:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:33,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:33,532 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 28 proven. 221 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-07-14 06:13:33,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:33,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390892471] [2022-07-14 06:13:33,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390892471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:33,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510617358] [2022-07-14 06:13:33,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:13:33,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:33,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:33,534 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:33,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-14 06:13:33,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-14 06:13:33,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:13:33,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-14 06:13:33,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:33,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:13:33,865 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:13:34,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-14 06:13:34,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-14 06:13:34,292 INFO L356 Elim1Store]: treesize reduction 3, result has 92.7 percent of original size [2022-07-14 06:13:34,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 51 [2022-07-14 06:13:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 12 proven. 125 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-14 06:13:34,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:35,515 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:35,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 40 [2022-07-14 06:13:35,533 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:35,533 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 103 treesize of output 112 [2022-07-14 06:13:35,542 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:35,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-07-14 06:13:36,187 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 137 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-07-14 06:13:36,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510617358] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:36,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:36,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 41 [2022-07-14 06:13:36,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669321419] [2022-07-14 06:13:36,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:36,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:13:36,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:36,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:13:36,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1570, Unknown=11, NotChecked=0, Total=1722 [2022-07-14 06:13:36,192 INFO L87 Difference]: Start difference. First operand 4191 states and 4705 transitions. Second operand has 42 states, 41 states have (on average 4.658536585365853) internal successors, (191), 42 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:39,286 INFO L93 Difference]: Finished difference Result 4312 states and 4749 transitions. [2022-07-14 06:13:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-14 06:13:39,286 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 4.658536585365853) internal successors, (191), 42 states have internal predecessors, (191), 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 119 [2022-07-14 06:13:39,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:39,289 INFO L225 Difference]: With dead ends: 4312 [2022-07-14 06:13:39,289 INFO L226 Difference]: Without dead ends: 4312 [2022-07-14 06:13:39,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 212 SyntacticMatches, 6 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4281 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1908, Invalid=13830, Unknown=12, NotChecked=0, Total=15750 [2022-07-14 06:13:39,290 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 207 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 1984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:39,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 419 Invalid, 1984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1583 Invalid, 0 Unknown, 331 Unchecked, 0.5s Time] [2022-07-14 06:13:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2022-07-14 06:13:39,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 2115. [2022-07-14 06:13:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2115 states, 2113 states have (on average 1.101751064836725) internal successors, (2328), 2114 states have internal predecessors, (2328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:39,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2115 states to 2115 states and 2328 transitions. [2022-07-14 06:13:39,309 INFO L78 Accepts]: Start accepts. Automaton has 2115 states and 2328 transitions. Word has length 119 [2022-07-14 06:13:39,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:39,309 INFO L495 AbstractCegarLoop]: Abstraction has 2115 states and 2328 transitions. [2022-07-14 06:13:39,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 4.658536585365853) internal successors, (191), 42 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:39,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2115 states and 2328 transitions. [2022-07-14 06:13:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-14 06:13:39,310 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:39,311 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:39,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:39,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:39,530 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash -142572733, now seen corresponding path program 14 times [2022-07-14 06:13:39,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:39,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377367164] [2022-07-14 06:13:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:39,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:39,743 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 45 proven. 284 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:13:39,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:39,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377367164] [2022-07-14 06:13:39,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377367164] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:39,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805990541] [2022-07-14 06:13:39,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-14 06:13:39,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:39,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:39,748 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:39,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-14 06:13:39,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-14 06:13:39,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:13:39,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-14 06:13:39,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 66 proven. 263 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:13:40,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:40,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2022-07-14 06:13:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 66 proven. 263 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:13:40,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805990541] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:40,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:40,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 39 [2022-07-14 06:13:40,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050565529] [2022-07-14 06:13:40,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:40,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-14 06:13:40,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:40,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-14 06:13:40,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2022-07-14 06:13:40,769 INFO L87 Difference]: Start difference. First operand 2115 states and 2328 transitions. Second operand has 40 states, 39 states have (on average 6.461538461538462) internal successors, (252), 40 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:41,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:41,505 INFO L93 Difference]: Finished difference Result 4032 states and 4444 transitions. [2022-07-14 06:13:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-14 06:13:41,506 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 6.461538461538462) internal successors, (252), 40 states have internal predecessors, (252), 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 121 [2022-07-14 06:13:41,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:41,509 INFO L225 Difference]: With dead ends: 4032 [2022-07-14 06:13:41,509 INFO L226 Difference]: Without dead ends: 4032 [2022-07-14 06:13:41,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 218 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=514, Invalid=2138, Unknown=0, NotChecked=0, Total=2652 [2022-07-14 06:13:41,510 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 532 mSDsluCounter, 864 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 936 SdHoareTripleChecker+Invalid, 1521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:41,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [532 Valid, 936 Invalid, 1521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:13:41,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4032 states. [2022-07-14 06:13:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4032 to 2347. [2022-07-14 06:13:41,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2345 states have (on average 1.1019189765458421) internal successors, (2584), 2346 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:41,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 2584 transitions. [2022-07-14 06:13:41,545 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 2584 transitions. Word has length 121 [2022-07-14 06:13:41,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:41,546 INFO L495 AbstractCegarLoop]: Abstraction has 2347 states and 2584 transitions. [2022-07-14 06:13:41,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 6.461538461538462) internal successors, (252), 40 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:41,546 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 2584 transitions. [2022-07-14 06:13:41,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-14 06:13:41,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:41,548 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:41,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:41,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:41,764 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:41,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:41,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1509957751, now seen corresponding path program 5 times [2022-07-14 06:13:41,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:41,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071571137] [2022-07-14 06:13:41,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:41,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 45 proven. 250 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-14 06:13:42,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:42,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071571137] [2022-07-14 06:13:42,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071571137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:42,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222651884] [2022-07-14 06:13:42,025 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:13:42,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:42,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:42,028 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:42,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-14 06:13:42,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-14 06:13:42,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:13:42,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-14 06:13:42,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:42,366 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:13:42,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:13:42,913 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 66 proven. 229 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-14 06:13:42,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 91 proven. 204 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-07-14 06:13:43,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222651884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:43,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:43,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 53 [2022-07-14 06:13:43,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231212013] [2022-07-14 06:13:43,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:43,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-14 06:13:43,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:43,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-14 06:13:43,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2477, Unknown=0, NotChecked=0, Total=2862 [2022-07-14 06:13:43,673 INFO L87 Difference]: Start difference. First operand 2347 states and 2584 transitions. Second operand has 54 states, 53 states have (on average 5.433962264150943) internal successors, (288), 54 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:45,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:45,103 INFO L93 Difference]: Finished difference Result 2743 states and 2994 transitions. [2022-07-14 06:13:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-14 06:13:45,103 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 5.433962264150943) internal successors, (288), 54 states have internal predecessors, (288), 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 126 [2022-07-14 06:13:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:45,105 INFO L225 Difference]: With dead ends: 2743 [2022-07-14 06:13:45,106 INFO L226 Difference]: Without dead ends: 2743 [2022-07-14 06:13:45,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1172, Invalid=4528, Unknown=0, NotChecked=0, Total=5700 [2022-07-14 06:13:45,106 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 755 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 755 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 2461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:45,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [755 Valid, 1224 Invalid, 2461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-14 06:13:45,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2743 states. [2022-07-14 06:13:45,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2743 to 2389. [2022-07-14 06:13:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2387 states have (on average 1.1026392961876832) internal successors, (2632), 2388 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 2632 transitions. [2022-07-14 06:13:45,126 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 2632 transitions. Word has length 126 [2022-07-14 06:13:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:45,126 INFO L495 AbstractCegarLoop]: Abstraction has 2389 states and 2632 transitions. [2022-07-14 06:13:45,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 5.433962264150943) internal successors, (288), 54 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 2632 transitions. [2022-07-14 06:13:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-14 06:13:45,128 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:45,128 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:45,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:45,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-07-14 06:13:45,344 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:45,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:45,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2034437485, now seen corresponding path program 1 times [2022-07-14 06:13:45,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:45,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836616217] [2022-07-14 06:13:45,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:45,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:45,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 68 proven. 278 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:13:46,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:46,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836616217] [2022-07-14 06:13:46,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836616217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:46,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869026469] [2022-07-14 06:13:46,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:46,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:46,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:46,284 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:46,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-07-14 06:13:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:46,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-14 06:13:46,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:46,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:13:46,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:13:46,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:13:47,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:13:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 68 proven. 278 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:13:47,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:47,108 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3840 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3840) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:13:47,111 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:47,111 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:13:47,114 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:47,114 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:13:47,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:13:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 68 proven. 278 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-14 06:13:47,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869026469] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:47,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:47,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 42 [2022-07-14 06:13:47,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454621385] [2022-07-14 06:13:47,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:47,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:13:47,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:47,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:13:47,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1539, Unknown=1, NotChecked=78, Total=1722 [2022-07-14 06:13:47,357 INFO L87 Difference]: Start difference. First operand 2389 states and 2632 transitions. Second operand has 42 states, 42 states have (on average 4.357142857142857) internal successors, (183), 42 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:48,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:48,685 INFO L93 Difference]: Finished difference Result 3689 states and 4059 transitions. [2022-07-14 06:13:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-14 06:13:48,685 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 4.357142857142857) internal successors, (183), 42 states have internal predecessors, (183), 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 128 [2022-07-14 06:13:48,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:48,687 INFO L225 Difference]: With dead ends: 3689 [2022-07-14 06:13:48,687 INFO L226 Difference]: Without dead ends: 2425 [2022-07-14 06:13:48,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 235 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=207, Invalid=3101, Unknown=2, NotChecked=112, Total=3422 [2022-07-14 06:13:48,688 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 121 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 2327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:48,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 1588 Invalid, 2327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2217 Invalid, 0 Unknown, 99 Unchecked, 0.8s Time] [2022-07-14 06:13:48,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2425 states. [2022-07-14 06:13:48,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2425 to 2361. [2022-07-14 06:13:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2359 states have (on average 1.1089444679949132) internal successors, (2616), 2360 states have internal predecessors, (2616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:48,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 2616 transitions. [2022-07-14 06:13:48,731 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 2616 transitions. Word has length 128 [2022-07-14 06:13:48,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:48,732 INFO L495 AbstractCegarLoop]: Abstraction has 2361 states and 2616 transitions. [2022-07-14 06:13:48,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 4.357142857142857) internal successors, (183), 42 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:48,732 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 2616 transitions. [2022-07-14 06:13:48,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-14 06:13:48,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:48,733 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:48,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:48,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-07-14 06:13:48,952 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:48,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:48,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1049209251, now seen corresponding path program 11 times [2022-07-14 06:13:48,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:48,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597787410] [2022-07-14 06:13:48,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:48,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 211 proven. 141 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:13:49,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597787410] [2022-07-14 06:13:49,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597787410] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:49,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840917551] [2022-07-14 06:13:49,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-14 06:13:49,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:49,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:49,184 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:49,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-07-14 06:13:49,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-14 06:13:49,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:13:49,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-14 06:13:49,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:49,513 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:13:49,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:13:50,097 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 261 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:13:50,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:50,439 INFO L134 CoverageAnalysis]: Checked inductivity of 418 backedges. 261 proven. 91 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-14 06:13:50,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840917551] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:50,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:50,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 55 [2022-07-14 06:13:50,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905600764] [2022-07-14 06:13:50,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:50,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-14 06:13:50,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:50,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-14 06:13:50,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=2462, Unknown=0, NotChecked=0, Total=2970 [2022-07-14 06:13:50,443 INFO L87 Difference]: Start difference. First operand 2361 states and 2616 transitions. Second operand has 55 states, 55 states have (on average 4.636363636363637) internal successors, (255), 55 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:51,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:51,627 INFO L93 Difference]: Finished difference Result 4086 states and 4438 transitions. [2022-07-14 06:13:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-14 06:13:51,628 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 4.636363636363637) internal successors, (255), 55 states have internal predecessors, (255), 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 129 [2022-07-14 06:13:51,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:51,631 INFO L225 Difference]: With dead ends: 4086 [2022-07-14 06:13:51,632 INFO L226 Difference]: Without dead ends: 4084 [2022-07-14 06:13:51,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2910 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2300, Invalid=7600, Unknown=0, NotChecked=0, Total=9900 [2022-07-14 06:13:51,633 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 1608 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1608 SdHoareTripleChecker+Valid, 726 SdHoareTripleChecker+Invalid, 1293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:51,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1608 Valid, 726 Invalid, 1293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:13:51,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4084 states. [2022-07-14 06:13:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4084 to 3215. [2022-07-14 06:13:51,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3215 states, 3213 states have (on average 1.1126672891378773) internal successors, (3575), 3214 states have internal predecessors, (3575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3215 states to 3215 states and 3575 transitions. [2022-07-14 06:13:51,658 INFO L78 Accepts]: Start accepts. Automaton has 3215 states and 3575 transitions. Word has length 129 [2022-07-14 06:13:51,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:51,658 INFO L495 AbstractCegarLoop]: Abstraction has 3215 states and 3575 transitions. [2022-07-14 06:13:51,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 4.636363636363637) internal successors, (255), 55 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3215 states and 3575 transitions. [2022-07-14 06:13:51,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-14 06:13:51,660 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:51,660 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:51,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:51,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:51,879 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:51,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1395817447, now seen corresponding path program 15 times [2022-07-14 06:13:51,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:51,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398959015] [2022-07-14 06:13:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:51,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 71 proven. 336 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:13:52,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:52,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398959015] [2022-07-14 06:13:52,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398959015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:52,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020450751] [2022-07-14 06:13:52,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-14 06:13:52,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:52,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:52,203 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:52,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-07-14 06:13:52,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-14 06:13:52,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:13:52,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-14 06:13:52,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:52,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:13:52,859 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2022-07-14 06:13:52,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2022-07-14 06:13:53,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-14 06:13:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 71 proven. 336 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:13:53,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:53,393 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_3967 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_3967) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 7 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-14 06:13:53,396 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:53,396 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-14 06:13:53,400 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:13:53,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2022-07-14 06:13:53,413 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-14 06:13:53,698 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 71 proven. 336 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:13:53,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020450751] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:53,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:53,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 42 [2022-07-14 06:13:53,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278624434] [2022-07-14 06:13:53,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:53,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-14 06:13:53,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:53,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-14 06:13:53,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1530, Unknown=1, NotChecked=78, Total=1722 [2022-07-14 06:13:53,700 INFO L87 Difference]: Start difference. First operand 3215 states and 3575 transitions. Second operand has 42 states, 42 states have (on average 5.357142857142857) internal successors, (225), 42 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:54,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:54,324 INFO L93 Difference]: Finished difference Result 5360 states and 5938 transitions. [2022-07-14 06:13:54,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-14 06:13:54,325 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.357142857142857) internal successors, (225), 42 states have internal predecessors, (225), 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 132 [2022-07-14 06:13:54,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:54,328 INFO L225 Difference]: With dead ends: 5360 [2022-07-14 06:13:54,328 INFO L226 Difference]: Without dead ends: 4125 [2022-07-14 06:13:54,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 238 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=2468, Unknown=1, NotChecked=100, Total=2756 [2022-07-14 06:13:54,328 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 92 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:54,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1765 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 741 Invalid, 0 Unknown, 164 Unchecked, 0.3s Time] [2022-07-14 06:13:54,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2022-07-14 06:13:54,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3447. [2022-07-14 06:13:54,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3445 states have (on average 1.1132075471698113) internal successors, (3835), 3446 states have internal predecessors, (3835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:54,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 3835 transitions. [2022-07-14 06:13:54,349 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 3835 transitions. Word has length 132 [2022-07-14 06:13:54,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:54,349 INFO L495 AbstractCegarLoop]: Abstraction has 3447 states and 3835 transitions. [2022-07-14 06:13:54,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.357142857142857) internal successors, (225), 42 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:54,349 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 3835 transitions. [2022-07-14 06:13:54,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-14 06:13:54,351 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:54,351 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:54,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-07-14 06:13:54,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:54,568 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash -782868425, now seen corresponding path program 6 times [2022-07-14 06:13:54,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:54,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934049648] [2022-07-14 06:13:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:54,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:54,726 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 207 proven. 122 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-14 06:13:54,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:54,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934049648] [2022-07-14 06:13:54,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934049648] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:54,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271994440] [2022-07-14 06:13:54,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:13:54,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:54,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:54,728 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:54,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-07-14 06:13:55,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-14 06:13:55,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:13:55,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-14 06:13:55,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:55,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:13:55,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:13:55,237 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:13:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 213 proven. 113 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-14 06:13:55,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 213 proven. 113 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-14 06:13:55,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271994440] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:55,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:55,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 46 [2022-07-14 06:13:55,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206536683] [2022-07-14 06:13:55,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:55,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-14 06:13:55,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:55,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-14 06:13:55,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=1747, Unknown=0, NotChecked=0, Total=2070 [2022-07-14 06:13:55,921 INFO L87 Difference]: Start difference. First operand 3447 states and 3835 transitions. Second operand has 46 states, 46 states have (on average 5.565217391304348) internal successors, (256), 46 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:56,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:56,458 INFO L93 Difference]: Finished difference Result 4175 states and 4609 transitions. [2022-07-14 06:13:56,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-14 06:13:56,459 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.565217391304348) internal successors, (256), 46 states have internal predecessors, (256), 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 133 [2022-07-14 06:13:56,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:56,461 INFO L225 Difference]: With dead ends: 4175 [2022-07-14 06:13:56,461 INFO L226 Difference]: Without dead ends: 3444 [2022-07-14 06:13:56,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=697, Invalid=3085, Unknown=0, NotChecked=0, Total=3782 [2022-07-14 06:13:56,462 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 255 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:56,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 649 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-14 06:13:56,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2022-07-14 06:13:56,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3386. [2022-07-14 06:13:56,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 3384 states have (on average 1.1125886524822695) internal successors, (3765), 3385 states have internal predecessors, (3765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:56,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 3765 transitions. [2022-07-14 06:13:56,485 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 3765 transitions. Word has length 133 [2022-07-14 06:13:56,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:56,485 INFO L495 AbstractCegarLoop]: Abstraction has 3386 states and 3765 transitions. [2022-07-14 06:13:56,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.565217391304348) internal successors, (256), 46 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 3765 transitions. [2022-07-14 06:13:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-14 06:13:56,487 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:56,487 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:56,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-07-14 06:13:56,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-07-14 06:13:56,706 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:13:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:13:56,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1429738854, now seen corresponding path program 12 times [2022-07-14 06:13:56,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:13:56,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850377515] [2022-07-14 06:13:56,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:13:56,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:13:56,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:13:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 207 proven. 120 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:13:56,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:13:56,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850377515] [2022-07-14 06:13:56,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850377515] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:13:56,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212567377] [2022-07-14 06:13:56,938 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-14 06:13:56,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:13:56,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:13:56,940 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:13:56,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-07-14 06:13:57,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-14 06:13:57,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:13:57,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-14 06:13:57,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:13:57,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-14 06:13:57,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-14 06:13:57,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:13:58,180 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 261 proven. 66 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:13:58,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-14 06:13:58,626 INFO L134 CoverageAnalysis]: Checked inductivity of 447 backedges. 261 proven. 66 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-14 06:13:58,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212567377] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-14 06:13:58,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-14 06:13:58,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 49 [2022-07-14 06:13:58,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957723417] [2022-07-14 06:13:58,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-14 06:13:58,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-14 06:13:58,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-14 06:13:58,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-14 06:13:58,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=1954, Unknown=0, NotChecked=0, Total=2352 [2022-07-14 06:13:58,627 INFO L87 Difference]: Start difference. First operand 3386 states and 3765 transitions. Second operand has 49 states, 49 states have (on average 5.204081632653061) internal successors, (255), 49 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-14 06:13:59,771 INFO L93 Difference]: Finished difference Result 3792 states and 4160 transitions. [2022-07-14 06:13:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-14 06:13:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 5.204081632653061) internal successors, (255), 49 states have internal predecessors, (255), 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 133 [2022-07-14 06:13:59,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-14 06:13:59,774 INFO L225 Difference]: With dead ends: 3792 [2022-07-14 06:13:59,774 INFO L226 Difference]: Without dead ends: 3670 [2022-07-14 06:13:59,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 236 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1049, Invalid=4501, Unknown=0, NotChecked=0, Total=5550 [2022-07-14 06:13:59,774 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 248 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-14 06:13:59,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 809 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-14 06:13:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3670 states. [2022-07-14 06:13:59,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3670 to 2901. [2022-07-14 06:13:59,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2899 states have (on average 1.1110727837185237) internal successors, (3221), 2900 states have internal predecessors, (3221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:59,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 3221 transitions. [2022-07-14 06:13:59,794 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 3221 transitions. Word has length 133 [2022-07-14 06:13:59,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-14 06:13:59,794 INFO L495 AbstractCegarLoop]: Abstraction has 2901 states and 3221 transitions. [2022-07-14 06:13:59,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.204081632653061) internal successors, (255), 49 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-14 06:13:59,794 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 3221 transitions. [2022-07-14 06:13:59,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-14 06:13:59,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-14 06:13:59,804 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-14 06:13:59,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-07-14 06:14:00,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-07-14 06:14:00,023 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-14 06:14:00,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-14 06:14:00,024 INFO L85 PathProgramCache]: Analyzing trace with hash -606633852, now seen corresponding path program 16 times [2022-07-14 06:14:00,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-14 06:14:00,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292346377] [2022-07-14 06:14:00,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-14 06:14:00,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-14 06:14:00,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-14 06:14:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 66 proven. 370 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-14 06:14:00,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-14 06:14:00,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292346377] [2022-07-14 06:14:00,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292346377] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-14 06:14:00,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098377365] [2022-07-14 06:14:00,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-14 06:14:00,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-14 06:14:00,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-14 06:14:00,276 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-14 06:14:00,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-07-14 06:14:00,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-14 06:14:00,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-14 06:14:00,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-14 06:14:00,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-14 06:14:00,557 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-14 06:14:00,557 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-14 06:14:00,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-14 06:14:00,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-14 06:14:00,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2022-07-14 06:14:01,652 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-14 06:14:01,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19