./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/cstrpbrk-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 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:35:34,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:35:34,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:35:34,320 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:35:34,321 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:35:34,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:35:34,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:35:34,327 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:35:34,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:35:34,333 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:35:34,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:35:34,336 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:35:34,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:35:34,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:35:34,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:35:34,343 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:35:34,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:35:34,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:35:34,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:35:34,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:35:34,352 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:35:34,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:35:34,354 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:35:34,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:35:34,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:35:34,361 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:35:34,362 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:35:34,362 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:35:34,363 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:35:34,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:35:34,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:35:34,365 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:35:34,366 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:35:34,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:35:34,367 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:35:34,368 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:35:34,368 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:35:34,369 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:35:34,369 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:35:34,369 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:35:34,370 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:35:34,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:35:34,373 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 05:35:34,403 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:35:34,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:35:34,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:35:34,404 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:35:34,404 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:35:34,404 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:35:34,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:35:34,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:35:34,405 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:35:34,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:35:34,406 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:35:34,407 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:35:34,407 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:35:34,407 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:35:34,407 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:35:34,407 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:35:34,408 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:35:34,408 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:35:34,408 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:35:34,408 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:35:34,408 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:35:34,409 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:35:34,409 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:35:34,409 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:35:34,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:35:34,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:35:34,410 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:35:34,410 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:35:34,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:35:34,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:35:34,411 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 [2022-07-23 05:35:34,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:35:34,631 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:35:34,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:35:34,635 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:35:34,635 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:35:34,636 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2022-07-23 05:35:34,680 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230bc5ba0/133b7dbc18954648af1db6c6063386d2/FLAG365190a9e [2022-07-23 05:35:35,127 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:35:35,127 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2022-07-23 05:35:35,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230bc5ba0/133b7dbc18954648af1db6c6063386d2/FLAG365190a9e [2022-07-23 05:35:35,161 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/230bc5ba0/133b7dbc18954648af1db6c6063386d2 [2022-07-23 05:35:35,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:35:35,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:35:35,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:35:35,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:35:35,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:35:35,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:35:35" (1/1) ... [2022-07-23 05:35:35,169 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3abbcd4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35, skipping insertion in model container [2022-07-23 05:35:35,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:35:35" (1/1) ... [2022-07-23 05:35:35,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:35:35,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:35:35,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:35:35,469 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:35:35,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:35:35,525 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:35:35,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35 WrapperNode [2022-07-23 05:35:35,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:35:35,526 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:35:35,526 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:35:35,527 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:35:35,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35" (1/1) ... [2022-07-23 05:35:35,551 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35" (1/1) ... [2022-07-23 05:35:35,566 INFO L137 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 101 [2022-07-23 05:35:35,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:35:35,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:35:35,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:35:35,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:35:35,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35" (1/1) ... [2022-07-23 05:35:35,574 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35" (1/1) ... [2022-07-23 05:35:35,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35" (1/1) ... [2022-07-23 05:35:35,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35" (1/1) ... [2022-07-23 05:35:35,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35" (1/1) ... [2022-07-23 05:35:35,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35" (1/1) ... [2022-07-23 05:35:35,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35" (1/1) ... [2022-07-23 05:35:35,594 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:35:35,595 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:35:35,595 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:35:35,595 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:35:35,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35" (1/1) ... [2022-07-23 05:35:35,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:35:35,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:35,623 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-23 05:35:35,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-23 05:35:35,661 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-23 05:35:35,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-23 05:35:35,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-23 05:35:35,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:35:35,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:35:35,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:35:35,743 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:35:35,744 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:35:35,952 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:35:35,957 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:35:35,959 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-23 05:35:35,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:35:35 BoogieIcfgContainer [2022-07-23 05:35:35,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:35:35,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:35:35,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:35:35,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:35:35,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:35:35" (1/3) ... [2022-07-23 05:35:35,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627c7ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:35:35, skipping insertion in model container [2022-07-23 05:35:35,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:35:35" (2/3) ... [2022-07-23 05:35:35,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@627c7ec3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:35:35, skipping insertion in model container [2022-07-23 05:35:35,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:35:35" (3/3) ... [2022-07-23 05:35:35,968 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk-alloca-2.i [2022-07-23 05:35:35,980 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:35:35,981 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2022-07-23 05:35:36,052 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:35:36,059 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@5649cee3, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f32b0dd [2022-07-23 05:35:36,059 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2022-07-23 05:35:36,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 34 states have (on average 1.911764705882353) 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) [2022-07-23 05:35:36,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:35:36,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:36,079 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:36,079 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)] === [2022-07-23 05:35:36,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:36,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2022-07-23 05:35:36,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:36,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143068183] [2022-07-23 05:35:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:36,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:36,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:36,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:36,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143068183] [2022-07-23 05:35:36,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143068183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:36,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:36,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:35:36,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46622142] [2022-07-23 05:35:36,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:36,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:35:36,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:36,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:35:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:35:36,332 INFO L87 Difference]: Start difference. First operand has 54 states, 34 states have (on average 1.911764705882353) 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) 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) [2022-07-23 05:35:36,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:36,399 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-07-23 05:35:36,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:35:36,402 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 [2022-07-23 05:35:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:36,409 INFO L225 Difference]: With dead ends: 100 [2022-07-23 05:35:36,409 INFO L226 Difference]: Without dead ends: 96 [2022-07-23 05:35:36,411 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 [2022-07-23 05:35:36,414 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 50 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:36,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 160 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:36,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-23 05:35:36,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2022-07-23 05:35:36,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.75) internal successors, (63), 54 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) [2022-07-23 05:35:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-07-23 05:35:36,450 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2022-07-23 05:35:36,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:36,451 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-07-23 05:35:36,451 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) [2022-07-23 05:35:36,451 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-07-23 05:35:36,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:35:36,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:36,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:36,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 05:35:36,453 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)] === [2022-07-23 05:35:36,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:36,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2022-07-23 05:35:36,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:36,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471285227] [2022-07-23 05:35:36,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:36,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:36,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:36,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471285227] [2022-07-23 05:35:36,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471285227] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:36,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:36,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:35:36,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969710011] [2022-07-23 05:35:36,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:36,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:35:36,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:36,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:35:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:35:36,557 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:36,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:36,600 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-07-23 05:35:36,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:35:36,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 05:35:36,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:36,603 INFO L225 Difference]: With dead ends: 53 [2022-07-23 05:35:36,603 INFO L226 Difference]: Without dead ends: 53 [2022-07-23 05:35:36,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:35:36,608 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 47 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 41 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 [2022-07-23 05:35:36,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 41 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:36,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-23 05:35:36,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-23 05:35:36,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.6944444444444444) 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) [2022-07-23 05:35:36,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-23 05:35:36,619 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2022-07-23 05:35:36,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:36,620 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-23 05:35:36,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:36,620 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-23 05:35:36,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:35:36,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:36,621 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:36,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-23 05:35:36,622 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)] === [2022-07-23 05:35:36,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:36,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2022-07-23 05:35:36,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:36,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714800440] [2022-07-23 05:35:36,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:36,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:36,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:36,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:36,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714800440] [2022-07-23 05:35:36,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714800440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:36,729 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:36,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:35:36,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607402097] [2022-07-23 05:35:36,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:36,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:35:36,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:36,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:35:36,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:35:36,730 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:36,862 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2022-07-23 05:35:36,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:35:36,863 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-23 05:35:36,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:36,866 INFO L225 Difference]: With dead ends: 97 [2022-07-23 05:35:36,866 INFO L226 Difference]: Without dead ends: 97 [2022-07-23 05:35:36,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:35:36,874 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 146 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:36,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 96 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:35:36,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-23 05:35:36,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2022-07-23 05:35:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-23 05:35:36,888 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2022-07-23 05:35:36,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:36,888 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-23 05:35:36,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:36,888 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-23 05:35:36,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:35:36,889 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:36,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:36,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-23 05:35:36,890 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)] === [2022-07-23 05:35:36,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:36,890 INFO L85 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2022-07-23 05:35:36,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:36,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120706177] [2022-07-23 05:35:36,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:36,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:36,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:36,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:36,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120706177] [2022-07-23 05:35:36,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120706177] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:36,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:36,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:35:36,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022783569] [2022-07-23 05:35:36,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:36,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:35:36,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:36,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:35:36,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:35:36,938 INFO L87 Difference]: Start difference. First operand 55 states and 64 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) [2022-07-23 05:35:36,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:36,966 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-07-23 05:35:36,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:35:36,967 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 [2022-07-23 05:35:36,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:36,967 INFO L225 Difference]: With dead ends: 54 [2022-07-23 05:35:36,968 INFO L226 Difference]: Without dead ends: 54 [2022-07-23 05:35:36,968 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 [2022-07-23 05:35:36,969 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 38 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 [2022-07-23 05:35:36,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 38 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:36,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-23 05:35:36,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-23 05:35:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 38 states have (on average 1.6578947368421053) 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) [2022-07-23 05:35:36,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2022-07-23 05:35:36,973 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2022-07-23 05:35:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:36,974 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2022-07-23 05:35:36,974 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) [2022-07-23 05:35:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2022-07-23 05:35:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:35:36,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:36,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:36,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-23 05:35:36,975 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)] === [2022-07-23 05:35:36,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:36,976 INFO L85 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2022-07-23 05:35:36,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:36,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613129615] [2022-07-23 05:35:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:36,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:36,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:37,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:37,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613129615] [2022-07-23 05:35:37,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613129615] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:37,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:37,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:35:37,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900947770] [2022-07-23 05:35:37,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:37,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:35:37,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:37,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:35:37,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:35:37,040 INFO L87 Difference]: Start difference. First operand 54 states and 63 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) [2022-07-23 05:35:37,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:37,066 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2022-07-23 05:35:37,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:35:37,067 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 [2022-07-23 05:35:37,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:37,068 INFO L225 Difference]: With dead ends: 98 [2022-07-23 05:35:37,068 INFO L226 Difference]: Without dead ends: 98 [2022-07-23 05:35:37,068 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 [2022-07-23 05:35:37,069 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:37,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 144 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-23 05:35:37,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2022-07-23 05:35:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 49 states have (on average 1.5714285714285714) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:37,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2022-07-23 05:35:37,079 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2022-07-23 05:35:37,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:37,079 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2022-07-23 05:35:37,079 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) [2022-07-23 05:35:37,079 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2022-07-23 05:35:37,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:35:37,080 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:37,082 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:37,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-23 05:35:37,083 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)] === [2022-07-23 05:35:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:37,083 INFO L85 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2022-07-23 05:35:37,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:37,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832773122] [2022-07-23 05:35:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:37,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:37,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:37,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:37,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832773122] [2022-07-23 05:35:37,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832773122] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:37,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:37,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:35:37,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919478116] [2022-07-23 05:35:37,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:37,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:35:37,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:37,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:35:37,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:35:37,121 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-07-23 05:35:37,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:37,142 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-07-23 05:35:37,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:35:37,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 [2022-07-23 05:35:37,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:37,143 INFO L225 Difference]: With dead ends: 63 [2022-07-23 05:35:37,144 INFO L226 Difference]: Without dead ends: 63 [2022-07-23 05:35:37,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:35:37,145 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:37,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:37,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-23 05:35:37,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-07-23 05:35:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 49 states have (on average 1.530612244897959) 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) [2022-07-23 05:35:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2022-07-23 05:35:37,149 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2022-07-23 05:35:37,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:37,149 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2022-07-23 05:35:37,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) [2022-07-23 05:35:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2022-07-23 05:35:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-23 05:35:37,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:37,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:37,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-23 05:35:37,151 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)] === [2022-07-23 05:35:37,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:37,151 INFO L85 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2022-07-23 05:35:37,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:37,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947172919] [2022-07-23 05:35:37,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:37,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:37,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:37,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:37,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:37,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947172919] [2022-07-23 05:35:37,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947172919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:37,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:37,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:35:37,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828076381] [2022-07-23 05:35:37,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:37,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:35:37,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:37,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:35:37,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:35:37,204 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) [2022-07-23 05:35:37,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:37,279 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2022-07-23 05:35:37,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:35:37,280 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 [2022-07-23 05:35:37,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:37,280 INFO L225 Difference]: With dead ends: 98 [2022-07-23 05:35:37,280 INFO L226 Difference]: Without dead ends: 98 [2022-07-23 05:35:37,281 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 [2022-07-23 05:35:37,281 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 124 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:37,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 91 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:35:37,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-23 05:35:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2022-07-23 05:35:37,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 64 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:37,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2022-07-23 05:35:37,286 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2022-07-23 05:35:37,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:37,286 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2022-07-23 05:35:37,286 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) [2022-07-23 05:35:37,286 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2022-07-23 05:35:37,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-23 05:35:37,287 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:37,287 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:37,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-23 05:35:37,287 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)] === [2022-07-23 05:35:37,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:37,288 INFO L85 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2022-07-23 05:35:37,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:37,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637535806] [2022-07-23 05:35:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:37,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:37,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:37,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:37,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:37,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637535806] [2022-07-23 05:35:37,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637535806] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:37,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:37,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:35:37,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933106537] [2022-07-23 05:35:37,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:37,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:35:37,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:37,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:35:37,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:35:37,326 INFO L87 Difference]: Start difference. First operand 65 states and 78 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) [2022-07-23 05:35:37,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:37,350 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2022-07-23 05:35:37,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:35:37,350 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 [2022-07-23 05:35:37,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:37,351 INFO L225 Difference]: With dead ends: 64 [2022-07-23 05:35:37,351 INFO L226 Difference]: Without dead ends: 64 [2022-07-23 05:35:37,351 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 [2022-07-23 05:35:37,352 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 89 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 36 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 [2022-07-23 05:35:37,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:37,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-23 05:35:37,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-07-23 05:35:37,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 63 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:37,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-07-23 05:35:37,356 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2022-07-23 05:35:37,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:37,356 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-07-23 05:35:37,356 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) [2022-07-23 05:35:37,356 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-07-23 05:35:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-23 05:35:37,357 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:37,357 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:37,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-23 05:35:37,358 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)] === [2022-07-23 05:35:37,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:37,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2022-07-23 05:35:37,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:37,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982339062] [2022-07-23 05:35:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:37,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:37,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:37,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:37,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982339062] [2022-07-23 05:35:37,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982339062] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:37,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134042265] [2022-07-23 05:35:37,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:37,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:37,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:37,423 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:35:37,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 05:35:37,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:37,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-23 05:35:37,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:37,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:37,601 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 [2022-07-23 05:35:37,613 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 [2022-07-23 05:35:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:37,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:37,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:37,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134042265] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:37,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:37,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-23 05:35:37,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732006127] [2022-07-23 05:35:37,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:37,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:35:37,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:37,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:35:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:35:37,905 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2022-07-23 05:35:38,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:38,096 INFO L93 Difference]: Finished difference Result 149 states and 173 transitions. [2022-07-23 05:35:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:35:38,096 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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 11 [2022-07-23 05:35:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:38,097 INFO L225 Difference]: With dead ends: 149 [2022-07-23 05:35:38,097 INFO L226 Difference]: Without dead ends: 149 [2022-07-23 05:35:38,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:35:38,098 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 207 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:38,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 281 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:35:38,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-23 05:35:38,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 59. [2022-07-23 05:35:38,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 58 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) [2022-07-23 05:35:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-23 05:35:38,102 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 11 [2022-07-23 05:35:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:38,103 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-23 05:35:38,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 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) [2022-07-23 05:35:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-23 05:35:38,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:35:38,104 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:38,104 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:38,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:38,323 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 [2022-07-23 05:35:38,324 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:38,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:38,324 INFO L85 PathProgramCache]: Analyzing trace with hash -464624131, now seen corresponding path program 1 times [2022-07-23 05:35:38,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:38,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041785552] [2022-07-23 05:35:38,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:38,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:38,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:38,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:38,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:38,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041785552] [2022-07-23 05:35:38,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041785552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:38,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:38,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:35:38,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474755655] [2022-07-23 05:35:38,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:38,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:35:38,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:38,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:35:38,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:35:38,351 INFO L87 Difference]: Start difference. First operand 59 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) [2022-07-23 05:35:38,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:38,382 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2022-07-23 05:35:38,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:35:38,383 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 [2022-07-23 05:35:38,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:38,383 INFO L225 Difference]: With dead ends: 57 [2022-07-23 05:35:38,384 INFO L226 Difference]: Without dead ends: 57 [2022-07-23 05:35:38,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:35:38,385 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 63 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:38,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 50 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:38,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-23 05:35:38,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-07-23 05:35:38,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 47 states have (on average 1.425531914893617) 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) [2022-07-23 05:35:38,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-23 05:35:38,387 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 12 [2022-07-23 05:35:38,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:38,388 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-23 05:35:38,388 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) [2022-07-23 05:35:38,388 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-23 05:35:38,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-23 05:35:38,390 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:38,390 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:38,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-23 05:35:38,390 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:38,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:38,391 INFO L85 PathProgramCache]: Analyzing trace with hash -464624130, now seen corresponding path program 1 times [2022-07-23 05:35:38,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:38,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306969985] [2022-07-23 05:35:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:38,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:38,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:38,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:38,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306969985] [2022-07-23 05:35:38,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306969985] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:38,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:38,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-23 05:35:38,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221996182] [2022-07-23 05:35:38,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:38,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:35:38,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:38,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:35:38,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:35:38,463 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) [2022-07-23 05:35:38,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:38,535 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-07-23 05:35:38,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:35:38,536 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 [2022-07-23 05:35:38,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:38,537 INFO L225 Difference]: With dead ends: 80 [2022-07-23 05:35:38,537 INFO L226 Difference]: Without dead ends: 80 [2022-07-23 05:35:38,537 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 [2022-07-23 05:35:38,538 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 226 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:38,538 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 66 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:38,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-23 05:35:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2022-07-23 05:35:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 50 states have (on average 1.42) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-07-23 05:35:38,541 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 12 [2022-07-23 05:35:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:38,541 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-07-23 05:35:38,542 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) [2022-07-23 05:35:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-07-23 05:35:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-23 05:35:38,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:38,542 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:38,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-23 05:35:38,543 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)] === [2022-07-23 05:35:38,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:38,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2022-07-23 05:35:38,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:38,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571504856] [2022-07-23 05:35:38,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:38,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:38,607 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:38,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:38,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571504856] [2022-07-23 05:35:38,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571504856] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:38,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857665969] [2022-07-23 05:35:38,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:38,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:38,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:38,610 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:35:38,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 05:35:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:38,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-23 05:35:38,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:38,706 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:38,707 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 [2022-07-23 05:35:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:38,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:38,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857665969] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:38,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:38,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2022-07-23 05:35:38,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845996480] [2022-07-23 05:35:38,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:38,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-23 05:35:38,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:38,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-23 05:35:38,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:35:38,950 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:39,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:39,120 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2022-07-23 05:35:39,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:35:39,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 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 [2022-07-23 05:35:39,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:39,121 INFO L225 Difference]: With dead ends: 124 [2022-07-23 05:35:39,121 INFO L226 Difference]: Without dead ends: 124 [2022-07-23 05:35:39,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2022-07-23 05:35:39,122 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 258 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:39,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 232 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:35:39,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-23 05:35:39,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 57. [2022-07-23 05:35:39,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.3958333333333333) 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) [2022-07-23 05:35:39,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-23 05:35:39,125 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 13 [2022-07-23 05:35:39,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:39,125 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-23 05:35:39,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 13 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:39,125 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-23 05:35:39,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 05:35:39,125 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:39,126 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:39,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:39,335 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 [2022-07-23 05:35:39,336 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:39,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:39,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1433224404, now seen corresponding path program 1 times [2022-07-23 05:35:39,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:39,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720408865] [2022-07-23 05:35:39,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:39,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:39,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:39,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720408865] [2022-07-23 05:35:39,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720408865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:39,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:39,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:35:39,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312243231] [2022-07-23 05:35:39,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:39,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:35:39,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:39,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:35:39,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:35:39,428 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2022-07-23 05:35:39,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:39,450 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2022-07-23 05:35:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:35:39,451 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-07-23 05:35:39,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:39,451 INFO L225 Difference]: With dead ends: 56 [2022-07-23 05:35:39,452 INFO L226 Difference]: Without dead ends: 53 [2022-07-23 05:35:39,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:35:39,453 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:39,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 70 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-23 05:35:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-07-23 05:35:39,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.3555555555555556) 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) [2022-07-23 05:35:39,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2022-07-23 05:35:39,456 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 16 [2022-07-23 05:35:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:39,457 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2022-07-23 05:35:39,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2022-07-23 05:35:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 05:35:39,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:39,458 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:39,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-23 05:35:39,459 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:39,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207485, now seen corresponding path program 1 times [2022-07-23 05:35:39,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:39,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684112293] [2022-07-23 05:35:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:39,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:39,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:39,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:39,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684112293] [2022-07-23 05:35:39,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684112293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:39,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:39,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-23 05:35:39,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726157502] [2022-07-23 05:35:39,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:39,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-23 05:35:39,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:39,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-23 05:35:39,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:35:39,503 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 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) [2022-07-23 05:35:39,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:39,536 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2022-07-23 05:35:39,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:35:39,537 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2022-07-23 05:35:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:39,538 INFO L225 Difference]: With dead ends: 50 [2022-07-23 05:35:39,538 INFO L226 Difference]: Without dead ends: 50 [2022-07-23 05:35:39,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:35:39,539 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 66 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:39,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 56 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-23 05:35:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-23 05:35:39,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.288888888888889) internal successors, (58), 49 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) [2022-07-23 05:35:39,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-07-23 05:35:39,542 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 16 [2022-07-23 05:35:39,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:39,542 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-07-23 05:35:39,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:39,543 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-07-23 05:35:39,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-23 05:35:39,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:39,545 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:39,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-23 05:35:39,546 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:39,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:39,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1433207484, now seen corresponding path program 1 times [2022-07-23 05:35:39,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:39,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452105088] [2022-07-23 05:35:39,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:39,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:39,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:39,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:39,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452105088] [2022-07-23 05:35:39,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452105088] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:39,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:39,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:35:39,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202011756] [2022-07-23 05:35:39,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:39,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:35:39,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:39,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:35:39,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:35:39,609 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2022-07-23 05:35:39,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:39,663 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-07-23 05:35:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-23 05:35:39,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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 [2022-07-23 05:35:39,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:39,664 INFO L225 Difference]: With dead ends: 62 [2022-07-23 05:35:39,664 INFO L226 Difference]: Without dead ends: 62 [2022-07-23 05:35:39,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:35:39,665 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 93 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:39,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 65 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-23 05:35:39,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-07-23 05:35:39,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.2884615384615385) 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) [2022-07-23 05:35:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2022-07-23 05:35:39,667 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 16 [2022-07-23 05:35:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:39,667 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2022-07-23 05:35:39,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 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) [2022-07-23 05:35:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2022-07-23 05:35:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-23 05:35:39,668 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:39,668 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] [2022-07-23 05:35:39,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-23 05:35:39,669 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:39,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:39,669 INFO L85 PathProgramCache]: Analyzing trace with hash 43271131, now seen corresponding path program 1 times [2022-07-23 05:35:39,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:39,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386681905] [2022-07-23 05:35:39,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:39,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:39,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:39,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386681905] [2022-07-23 05:35:39,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386681905] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:39,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:39,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:35:39,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145507881] [2022-07-23 05:35:39,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:39,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:35:39,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:39,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:35:39,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:35:39,690 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:39,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:39,695 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2022-07-23 05:35:39,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:35:39,696 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 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 [2022-07-23 05:35:39,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:39,696 INFO L225 Difference]: With dead ends: 59 [2022-07-23 05:35:39,696 INFO L226 Difference]: Without dead ends: 59 [2022-07-23 05:35:39,697 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 [2022-07-23 05:35:39,697 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 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 [2022-07-23 05:35:39,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:39,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-23 05:35:39,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-07-23 05:35:39,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 58 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) [2022-07-23 05:35:39,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2022-07-23 05:35:39,700 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 20 [2022-07-23 05:35:39,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:39,700 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2022-07-23 05:35:39,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:39,700 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2022-07-23 05:35:39,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 05:35:39,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:39,701 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] [2022-07-23 05:35:39,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-23 05:35:39,701 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:39,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:39,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1371974184, now seen corresponding path program 1 times [2022-07-23 05:35:39,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:39,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651472222] [2022-07-23 05:35:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:39,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:39,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:39,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651472222] [2022-07-23 05:35:39,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651472222] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:39,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:39,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-23 05:35:39,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499647157] [2022-07-23 05:35:39,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:39,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-23 05:35:39,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:39,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-23 05:35:39,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:35:39,783 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:39,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:39,842 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2022-07-23 05:35:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-23 05:35:39,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-23 05:35:39,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:39,843 INFO L225 Difference]: With dead ends: 71 [2022-07-23 05:35:39,843 INFO L226 Difference]: Without dead ends: 54 [2022-07-23 05:35:39,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:35:39,844 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 185 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 [2022-07-23 05:35:39,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 185 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:39,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-23 05:35:39,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-07-23 05:35:39,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 53 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) [2022-07-23 05:35:39,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-07-23 05:35:39,846 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 22 [2022-07-23 05:35:39,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:39,846 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-07-23 05:35:39,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-07-23 05:35:39,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-23 05:35:39,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:39,847 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] [2022-07-23 05:35:39,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-23 05:35:39,848 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:39,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:39,848 INFO L85 PathProgramCache]: Analyzing trace with hash 2105344662, now seen corresponding path program 1 times [2022-07-23 05:35:39,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:39,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058491137] [2022-07-23 05:35:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:39,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:39,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:39,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058491137] [2022-07-23 05:35:39,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058491137] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:39,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:39,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-23 05:35:39,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381051205] [2022-07-23 05:35:39,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:39,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-23 05:35:39,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:39,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-23 05:35:39,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-23 05:35:39,969 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:40,044 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2022-07-23 05:35:40,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-23 05:35:40,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-23 05:35:40,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:40,046 INFO L225 Difference]: With dead ends: 74 [2022-07-23 05:35:40,046 INFO L226 Difference]: Without dead ends: 62 [2022-07-23 05:35:40,047 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 [2022-07-23 05:35:40,047 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 58 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:40,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 165 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:35:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-23 05:35:40,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2022-07-23 05:35:40,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.2549019607843137) internal successors, (64), 55 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:40,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-07-23 05:35:40,049 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 22 [2022-07-23 05:35:40,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:40,050 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-07-23 05:35:40,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:40,050 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-07-23 05:35:40,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 05:35:40,051 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:40,052 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:40,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-23 05:35:40,052 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1877695219, now seen corresponding path program 1 times [2022-07-23 05:35:40,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:40,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227694989] [2022-07-23 05:35:40,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:40,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:40,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227694989] [2022-07-23 05:35:40,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227694989] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:40,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:40,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-23 05:35:40,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876598676] [2022-07-23 05:35:40,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:40,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-23 05:35:40,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:40,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-23 05:35:40,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-23 05:35:40,177 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:40,294 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2022-07-23 05:35:40,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:35:40,294 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2022-07-23 05:35:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:40,295 INFO L225 Difference]: With dead ends: 75 [2022-07-23 05:35:40,295 INFO L226 Difference]: Without dead ends: 75 [2022-07-23 05:35:40,295 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 [2022-07-23 05:35:40,296 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 73 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:40,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 187 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:35:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-23 05:35:40,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2022-07-23 05:35:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.2205882352941178) internal successors, (83), 72 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-07-23 05:35:40,298 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 26 [2022-07-23 05:35:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:40,298 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-07-23 05:35:40,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-07-23 05:35:40,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-23 05:35:40,298 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:40,298 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:40,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-23 05:35:40,299 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:40,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:40,299 INFO L85 PathProgramCache]: Analyzing trace with hash 72256885, now seen corresponding path program 1 times [2022-07-23 05:35:40,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:40,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436436165] [2022-07-23 05:35:40,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:40,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:40,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:40,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:40,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436436165] [2022-07-23 05:35:40,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436436165] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:40,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:40,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-23 05:35:40,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646582675] [2022-07-23 05:35:40,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:40,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-23 05:35:40,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:40,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-23 05:35:40,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-23 05:35:40,463 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:40,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:40,681 INFO L93 Difference]: Finished difference Result 96 states and 107 transitions. [2022-07-23 05:35:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:35:40,682 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2022-07-23 05:35:40,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:40,683 INFO L225 Difference]: With dead ends: 96 [2022-07-23 05:35:40,683 INFO L226 Difference]: Without dead ends: 96 [2022-07-23 05:35:40,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:35:40,684 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 123 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:40,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 197 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:35:40,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-23 05:35:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2022-07-23 05:35:40,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2318840579710144) internal successors, (85), 73 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 85 transitions. [2022-07-23 05:35:40,686 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 85 transitions. Word has length 26 [2022-07-23 05:35:40,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:40,686 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 85 transitions. [2022-07-23 05:35:40,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:40,686 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 85 transitions. [2022-07-23 05:35:40,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-23 05:35:40,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:40,687 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] [2022-07-23 05:35:40,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-23 05:35:40,687 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:40,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1740534735, now seen corresponding path program 1 times [2022-07-23 05:35:40,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:40,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978495210] [2022-07-23 05:35:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:40,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:40,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:40,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978495210] [2022-07-23 05:35:40,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978495210] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:35:40,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:35:40,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-23 05:35:40,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574410784] [2022-07-23 05:35:40,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:35:40,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:35:40,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:40,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:35:40,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:35:40,780 INFO L87 Difference]: Start difference. First operand 74 states and 85 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2022-07-23 05:35:40,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:40,966 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-07-23 05:35:40,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 05:35:40,966 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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 27 [2022-07-23 05:35:40,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:40,967 INFO L225 Difference]: With dead ends: 75 [2022-07-23 05:35:40,967 INFO L226 Difference]: Without dead ends: 51 [2022-07-23 05:35:40,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-23 05:35:40,968 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 45 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:40,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 159 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:35:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-23 05:35:40,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-07-23 05:35:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-23 05:35:40,970 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 27 [2022-07-23 05:35:40,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:40,970 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-23 05:35:40,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 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) [2022-07-23 05:35:40,971 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-23 05:35:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-23 05:35:40,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:40,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:40,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-23 05:35:40,972 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:40,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:40,972 INFO L85 PathProgramCache]: Analyzing trace with hash -145898734, now seen corresponding path program 1 times [2022-07-23 05:35:40,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:40,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284321874] [2022-07-23 05:35:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:40,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:41,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:41,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:41,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284321874] [2022-07-23 05:35:41,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284321874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:41,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324397528] [2022-07-23 05:35:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:41,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:41,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:41,075 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:35:41,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 05:35:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:41,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 05:35:41,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:41,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:41,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:41,375 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 [2022-07-23 05:35:41,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:41,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324397528] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:41,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:41,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-07-23 05:35:41,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269884713] [2022-07-23 05:35:41,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:41,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 05:35:41,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:41,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 05:35:41,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-23 05:35:41,398 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:41,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:41,567 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2022-07-23 05:35:41,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:35:41,569 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 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 30 [2022-07-23 05:35:41,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:41,569 INFO L225 Difference]: With dead ends: 69 [2022-07-23 05:35:41,569 INFO L226 Difference]: Without dead ends: 65 [2022-07-23 05:35:41,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:35:41,570 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 458 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:41,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 143 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:35:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-23 05:35:41,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2022-07-23 05:35:41,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1666666666666667) internal successors, (49), 44 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:41,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2022-07-23 05:35:41,573 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 30 [2022-07-23 05:35:41,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:41,573 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2022-07-23 05:35:41,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.4) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:41,573 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2022-07-23 05:35:41,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-23 05:35:41,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:41,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:41,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:41,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:41,788 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)] === [2022-07-23 05:35:41,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash 36573013, now seen corresponding path program 1 times [2022-07-23 05:35:41,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:41,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632736946] [2022-07-23 05:35:41,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:41,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:41,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:41,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632736946] [2022-07-23 05:35:41,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632736946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:41,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028718764] [2022-07-23 05:35:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:41,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:41,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:41,888 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:35:41,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 05:35:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:41,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 05:35:41,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:42,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:42,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:42,163 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 [2022-07-23 05:35:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:42,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028718764] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:42,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:42,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-07-23 05:35:42,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740907915] [2022-07-23 05:35:42,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:42,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 05:35:42,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:42,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 05:35:42,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:35:42,185 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:42,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:42,341 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2022-07-23 05:35:42,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:35:42,342 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-23 05:35:42,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:42,343 INFO L225 Difference]: With dead ends: 86 [2022-07-23 05:35:42,343 INFO L226 Difference]: Without dead ends: 86 [2022-07-23 05:35:42,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:35:42,344 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 344 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:42,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [344 Valid, 190 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:35:42,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-23 05:35:42,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 62. [2022-07-23 05:35:42,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 60 states have (on average 1.15) internal successors, (69), 61 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) [2022-07-23 05:35:42,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-07-23 05:35:42,346 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 33 [2022-07-23 05:35:42,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:42,347 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-07-23 05:35:42,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 4.875) internal successors, (78), 17 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:42,347 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-07-23 05:35:42,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-23 05:35:42,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:42,347 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] [2022-07-23 05:35:42,373 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:42,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:42,571 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:42,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:42,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1001387738, now seen corresponding path program 2 times [2022-07-23 05:35:42,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:42,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880602153] [2022-07-23 05:35:42,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:42,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:42,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:42,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880602153] [2022-07-23 05:35:42,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880602153] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:42,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705867090] [2022-07-23 05:35:42,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:35:42,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:42,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:42,733 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:35:42,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 05:35:42,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:35:42,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:42,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 05:35:42,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:42,932 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 [2022-07-23 05:35:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:43,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:43,329 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 [2022-07-23 05:35:43,332 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 [2022-07-23 05:35:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:43,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705867090] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:43,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:43,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 32 [2022-07-23 05:35:43,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971404561] [2022-07-23 05:35:43,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:43,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-23 05:35:43,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:43,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-23 05:35:43,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2022-07-23 05:35:43,517 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:43,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:43,913 INFO L93 Difference]: Finished difference Result 106 states and 114 transitions. [2022-07-23 05:35:43,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 05:35:43,914 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 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 [2022-07-23 05:35:43,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:43,915 INFO L225 Difference]: With dead ends: 106 [2022-07-23 05:35:43,915 INFO L226 Difference]: Without dead ends: 100 [2022-07-23 05:35:43,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=304, Invalid=1418, Unknown=0, NotChecked=0, Total=1722 [2022-07-23 05:35:43,916 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 188 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:43,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 423 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 234 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-07-23 05:35:43,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-23 05:35:43,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-07-23 05:35:43,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.1170212765957446) internal successors, (105), 95 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:43,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 105 transitions. [2022-07-23 05:35:43,919 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 105 transitions. Word has length 36 [2022-07-23 05:35:43,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:43,919 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 105 transitions. [2022-07-23 05:35:43,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.46875) internal successors, (79), 32 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:43,919 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 105 transitions. [2022-07-23 05:35:43,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-23 05:35:43,919 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:43,919 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-23 05:35:43,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:44,132 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,SelfDestructingSolverStorable23 [2022-07-23 05:35:44,132 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:44,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:44,133 INFO L85 PathProgramCache]: Analyzing trace with hash -304963965, now seen corresponding path program 3 times [2022-07-23 05:35:44,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:44,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908026302] [2022-07-23 05:35:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:44,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:44,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:44,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:44,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908026302] [2022-07-23 05:35:44,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908026302] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:44,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495027488] [2022-07-23 05:35:44,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:35:44,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:44,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:44,255 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:35:44,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 05:35:44,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-23 05:35:44,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:44,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-23 05:35:44,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:44,358 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:44,359 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 [2022-07-23 05:35:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:44,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:44,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495027488] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:44,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:44,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2022-07-23 05:35:44,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531897238] [2022-07-23 05:35:44,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:44,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-23 05:35:44,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-23 05:35:44,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-07-23 05:35:44,866 INFO L87 Difference]: Start difference. First operand 96 states and 105 transitions. Second operand has 29 states, 28 states have (on average 4.0) internal successors, (112), 29 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:45,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:45,216 INFO L93 Difference]: Finished difference Result 149 states and 161 transitions. [2022-07-23 05:35:45,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-23 05:35:45,217 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 4.0) internal successors, (112), 29 states have internal predecessors, (112), 0 states have call successors, (0), 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 40 [2022-07-23 05:35:45,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:45,218 INFO L225 Difference]: With dead ends: 149 [2022-07-23 05:35:45,218 INFO L226 Difference]: Without dead ends: 149 [2022-07-23 05:35:45,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2022-07-23 05:35:45,219 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 375 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:45,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 269 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:35:45,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-23 05:35:45,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 108. [2022-07-23 05:35:45,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 106 states have (on average 1.1226415094339623) internal successors, (119), 107 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:45,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 119 transitions. [2022-07-23 05:35:45,222 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 119 transitions. Word has length 40 [2022-07-23 05:35:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:45,222 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 119 transitions. [2022-07-23 05:35:45,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 4.0) internal successors, (112), 29 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:45,222 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 119 transitions. [2022-07-23 05:35:45,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-23 05:35:45,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:45,223 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:45,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:45,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:45,423 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:45,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1930803928, now seen corresponding path program 2 times [2022-07-23 05:35:45,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:45,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305377868] [2022-07-23 05:35:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:45,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:45,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:45,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305377868] [2022-07-23 05:35:45,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305377868] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:45,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459456955] [2022-07-23 05:35:45,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:35:45,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:45,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:45,625 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:35:45,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 05:35:45,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:35:45,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:45,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-23 05:35:45,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:45,717 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 [2022-07-23 05:35:45,806 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 [2022-07-23 05:35:45,840 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 [2022-07-23 05:35:46,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:46,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:46,796 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:46,797 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 28 [2022-07-23 05:35:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:46,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:47,823 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:47,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 40 [2022-07-23 05:35:47,845 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-23 05:35:47,852 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 72 treesize of output 71 [2022-07-23 05:35:47,874 INFO L356 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-07-23 05:35:47,875 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 56 treesize of output 58 [2022-07-23 05:35:47,934 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 22 treesize of output 18 [2022-07-23 05:35:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:48,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459456955] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:48,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:48,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 20, 21] total 49 [2022-07-23 05:35:48,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978448461] [2022-07-23 05:35:48,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:48,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-23 05:35:48,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:48,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-23 05:35:48,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=2063, Unknown=0, NotChecked=0, Total=2352 [2022-07-23 05:35:48,203 INFO L87 Difference]: Start difference. First operand 108 states and 119 transitions. Second operand has 49 states, 49 states have (on average 2.6530612244897958) internal successors, (130), 49 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) [2022-07-23 05:35:49,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:49,502 INFO L93 Difference]: Finished difference Result 217 states and 232 transitions. [2022-07-23 05:35:49,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-23 05:35:49,508 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.6530612244897958) internal successors, (130), 49 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 [2022-07-23 05:35:49,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:49,509 INFO L225 Difference]: With dead ends: 217 [2022-07-23 05:35:49,509 INFO L226 Difference]: Without dead ends: 194 [2022-07-23 05:35:49,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=642, Invalid=5058, Unknown=0, NotChecked=0, Total=5700 [2022-07-23 05:35:49,512 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:49,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 251 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 192 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-07-23 05:35:49,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-07-23 05:35:49,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 187. [2022-07-23 05:35:49,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 185 states have (on average 1.0918918918918918) internal successors, (202), 186 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) [2022-07-23 05:35:49,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 202 transitions. [2022-07-23 05:35:49,516 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 202 transitions. Word has length 46 [2022-07-23 05:35:49,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:49,516 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 202 transitions. [2022-07-23 05:35:49,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.6530612244897958) internal successors, (130), 49 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) [2022-07-23 05:35:49,516 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 202 transitions. [2022-07-23 05:35:49,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-23 05:35:49,517 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:49,517 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-23 05:35:49,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:49,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:49,732 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:49,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:49,732 INFO L85 PathProgramCache]: Analyzing trace with hash 371510231, now seen corresponding path program 4 times [2022-07-23 05:35:49,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:49,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585325220] [2022-07-23 05:35:49,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:49,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:49,997 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:35:49,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:49,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585325220] [2022-07-23 05:35:49,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585325220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:49,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324884265] [2022-07-23 05:35:49,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:35:49,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:49,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:49,998 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:35:49,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 05:35:50,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:35:50,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:50,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-23 05:35:50,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:50,081 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:50,082 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 [2022-07-23 05:35:50,256 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 [2022-07-23 05:35:50,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:50,538 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 [2022-07-23 05:35:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:50,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:50,824 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 [2022-07-23 05:35:50,827 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 [2022-07-23 05:35:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:51,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324884265] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:51,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:51,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 40 [2022-07-23 05:35:51,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541778333] [2022-07-23 05:35:51,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:51,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-23 05:35:51,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:51,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-23 05:35:51,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1412, Unknown=0, NotChecked=0, Total=1560 [2022-07-23 05:35:51,147 INFO L87 Difference]: Start difference. First operand 187 states and 202 transitions. Second operand has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:52,178 INFO L93 Difference]: Finished difference Result 238 states and 256 transitions. [2022-07-23 05:35:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 05:35:52,179 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 0 states have call successors, (0), 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 [2022-07-23 05:35:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:52,180 INFO L225 Difference]: With dead ends: 238 [2022-07-23 05:35:52,180 INFO L226 Difference]: Without dead ends: 235 [2022-07-23 05:35:52,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=534, Invalid=4158, Unknown=0, NotChecked=0, Total=4692 [2022-07-23 05:35:52,182 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 220 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:52,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 370 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 315 Invalid, 0 Unknown, 177 Unchecked, 0.2s Time] [2022-07-23 05:35:52,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-23 05:35:52,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 227. [2022-07-23 05:35:52,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 225 states have (on average 1.0888888888888888) internal successors, (245), 226 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:52,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 245 transitions. [2022-07-23 05:35:52,186 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 245 transitions. Word has length 46 [2022-07-23 05:35:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:52,187 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 245 transitions. [2022-07-23 05:35:52,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 40 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:52,187 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 245 transitions. [2022-07-23 05:35:52,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-23 05:35:52,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:52,188 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-23 05:35:52,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:52,395 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,SelfDestructingSolverStorable26 [2022-07-23 05:35:52,396 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:52,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:52,396 INFO L85 PathProgramCache]: Analyzing trace with hash -129625868, now seen corresponding path program 5 times [2022-07-23 05:35:52,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:52,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361719142] [2022-07-23 05:35:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:52,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:52,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:52,546 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:52,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:52,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361719142] [2022-07-23 05:35:52,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361719142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:52,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516818000] [2022-07-23 05:35:52,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:35:52,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:52,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:52,548 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:35:52,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 05:35:52,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-23 05:35:52,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:35:52,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-23 05:35:52,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:52,644 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:52,645 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 [2022-07-23 05:35:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:52,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:35:53,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516818000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:53,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:53,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 29 [2022-07-23 05:35:53,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498741937] [2022-07-23 05:35:53,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:53,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-23 05:35:53,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:53,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-23 05:35:53,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2022-07-23 05:35:53,122 INFO L87 Difference]: Start difference. First operand 227 states and 245 transitions. Second operand has 30 states, 29 states have (on average 4.551724137931035) internal successors, (132), 30 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:53,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:35:53,571 INFO L93 Difference]: Finished difference Result 348 states and 374 transitions. [2022-07-23 05:35:53,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 05:35:53,571 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.551724137931035) internal successors, (132), 30 states have internal predecessors, (132), 0 states have call successors, (0), 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 50 [2022-07-23 05:35:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:35:53,572 INFO L225 Difference]: With dead ends: 348 [2022-07-23 05:35:53,572 INFO L226 Difference]: Without dead ends: 348 [2022-07-23 05:35:53,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=1208, Unknown=0, NotChecked=0, Total=1560 [2022-07-23 05:35:53,574 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 296 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:35:53,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 490 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:35:53,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-07-23 05:35:53,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 295. [2022-07-23 05:35:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 293 states have (on average 1.098976109215017) internal successors, (322), 294 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:53,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 322 transitions. [2022-07-23 05:35:53,581 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 322 transitions. Word has length 50 [2022-07-23 05:35:53,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:35:53,582 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 322 transitions. [2022-07-23 05:35:53,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.551724137931035) internal successors, (132), 30 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:35:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 322 transitions. [2022-07-23 05:35:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 05:35:53,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:35:53,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:35:53,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-23 05:35:53,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-23 05:35:53,787 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:35:53,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:35:53,788 INFO L85 PathProgramCache]: Analyzing trace with hash -847276983, now seen corresponding path program 1 times [2022-07-23 05:35:53,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:35:53,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191491493] [2022-07-23 05:35:53,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:53,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:35:53,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:35:53,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:35:53,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191491493] [2022-07-23 05:35:53,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191491493] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:35:53,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820738735] [2022-07-23 05:35:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:35:53,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:35:53,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:35:53,950 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:35:53,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 05:35:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:35:54,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 86 conjunts are in the unsatisfiable core [2022-07-23 05:35:54,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:35:54,188 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 [2022-07-23 05:35:54,227 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:35:54,228 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 [2022-07-23 05:35:54,232 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 8 treesize of output 3 [2022-07-23 05:35:56,640 INFO L356 Elim1Store]: treesize reduction 136, result has 37.3 percent of original size [2022-07-23 05:35:56,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 162 treesize of output 158 [2022-07-23 05:35:57,106 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:35:57,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:35:58,820 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:58,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 89 [2022-07-23 05:35:58,846 INFO L356 Elim1Store]: treesize reduction 18, result has 48.6 percent of original size [2022-07-23 05:35:58,847 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 174 treesize of output 161 [2022-07-23 05:35:58,893 INFO L356 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-07-23 05:35:58,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 134 [2022-07-23 05:35:59,063 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:35:59,063 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 130 treesize of output 86 [2022-07-23 05:35:59,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:59,084 INFO L356 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2022-07-23 05:35:59,085 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 3 case distinctions, treesize of input 169 treesize of output 147 [2022-07-23 05:35:59,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:59,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:35:59,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:35:59,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 78 [2022-07-23 05:35:59,342 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:35:59,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820738735] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:35:59,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:35:59,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 28, 28] total 62 [2022-07-23 05:35:59,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967829752] [2022-07-23 05:35:59,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:35:59,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-23 05:35:59,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:35:59,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-23 05:35:59,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=3471, Unknown=1, NotChecked=0, Total=3782 [2022-07-23 05:35:59,345 INFO L87 Difference]: Start difference. First operand 295 states and 322 transitions. Second operand has 62 states, 62 states have (on average 2.2419354838709675) internal successors, (139), 62 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) [2022-07-23 05:36:01,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:01,234 INFO L93 Difference]: Finished difference Result 339 states and 366 transitions. [2022-07-23 05:36:01,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-23 05:36:01,235 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2419354838709675) internal successors, (139), 62 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) Word has length 56 [2022-07-23 05:36:01,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:01,236 INFO L225 Difference]: With dead ends: 339 [2022-07-23 05:36:01,236 INFO L226 Difference]: Without dead ends: 305 [2022-07-23 05:36:01,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 61 SyntacticMatches, 12 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=863, Invalid=5942, Unknown=1, NotChecked=0, Total=6806 [2022-07-23 05:36:01,238 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 340 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 236 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:01,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 635 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 435 Invalid, 0 Unknown, 236 Unchecked, 0.2s Time] [2022-07-23 05:36:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-07-23 05:36:01,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 301. [2022-07-23 05:36:01,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 299 states have (on average 1.0969899665551839) internal successors, (328), 300 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 328 transitions. [2022-07-23 05:36:01,243 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 328 transitions. Word has length 56 [2022-07-23 05:36:01,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:01,243 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 328 transitions. [2022-07-23 05:36:01,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2419354838709675) internal successors, (139), 62 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) [2022-07-23 05:36:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 328 transitions. [2022-07-23 05:36:01,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-23 05:36:01,244 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:01,245 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-23 05:36:01,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:01,455 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,SelfDestructingSolverStorable28 [2022-07-23 05:36:01,455 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:01,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:01,456 INFO L85 PathProgramCache]: Analyzing trace with hash 509273480, now seen corresponding path program 6 times [2022-07-23 05:36:01,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:01,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540099240] [2022-07-23 05:36:01,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:01,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:01,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:01,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:01,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540099240] [2022-07-23 05:36:01,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540099240] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:01,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748653430] [2022-07-23 05:36:01,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:36:01,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:01,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:01,618 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:36:01,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 05:36:01,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-23 05:36:01,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:01,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-23 05:36:01,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:01,813 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 [2022-07-23 05:36:04,351 INFO L356 Elim1Store]: treesize reduction 58, result has 17.1 percent of original size [2022-07-23 05:36:04,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 26 [2022-07-23 05:36:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 28 refuted. 10 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:04,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:04,775 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 46 treesize of output 40 [2022-07-23 05:36:04,779 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-23 05:36:04,780 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 76 treesize of output 64 [2022-07-23 05:36:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:04,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748653430] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:04,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:04,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 49 [2022-07-23 05:36:04,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586920559] [2022-07-23 05:36:04,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:04,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-23 05:36:04,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:04,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-23 05:36:04,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=2114, Unknown=8, NotChecked=0, Total=2352 [2022-07-23 05:36:04,986 INFO L87 Difference]: Start difference. First operand 301 states and 328 transitions. Second operand has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:09,674 INFO L93 Difference]: Finished difference Result 391 states and 421 transitions. [2022-07-23 05:36:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-23 05:36:09,674 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 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 56 [2022-07-23 05:36:09,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:09,679 INFO L225 Difference]: With dead ends: 391 [2022-07-23 05:36:09,679 INFO L226 Difference]: Without dead ends: 360 [2022-07-23 05:36:09,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 78 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=669, Invalid=5481, Unknown=12, NotChecked=0, Total=6162 [2022-07-23 05:36:09,681 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 166 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 806 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:09,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 806 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 709 Invalid, 0 Unknown, 158 Unchecked, 0.3s Time] [2022-07-23 05:36:09,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-23 05:36:09,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 334. [2022-07-23 05:36:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 332 states have (on average 1.0963855421686748) internal successors, (364), 333 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:09,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 364 transitions. [2022-07-23 05:36:09,687 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 364 transitions. Word has length 56 [2022-07-23 05:36:09,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:09,688 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 364 transitions. [2022-07-23 05:36:09,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.7755102040816326) internal successors, (136), 49 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:09,688 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 364 transitions. [2022-07-23 05:36:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-23 05:36:09,689 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:09,689 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-23 05:36:09,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:09,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:09,903 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:09,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:09,904 INFO L85 PathProgramCache]: Analyzing trace with hash 223488613, now seen corresponding path program 7 times [2022-07-23 05:36:09,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:09,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474608190] [2022-07-23 05:36:09,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:09,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:10,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:10,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474608190] [2022-07-23 05:36:10,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474608190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:10,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135385525] [2022-07-23 05:36:10,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:36:10,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:10,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:10,124 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-23 05:36:10,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 05:36:10,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:10,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-23 05:36:10,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:10,411 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:10,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:10,620 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 [2022-07-23 05:36:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 15 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:10,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135385525] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:10,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:10,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 30 [2022-07-23 05:36:10,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962252219] [2022-07-23 05:36:10,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:10,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 05:36:10,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 05:36:10,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=826, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:36:10,657 INFO L87 Difference]: Start difference. First operand 334 states and 364 transitions. Second operand has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 31 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:11,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:11,516 INFO L93 Difference]: Finished difference Result 484 states and 521 transitions. [2022-07-23 05:36:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:36:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 31 states have internal predecessors, (128), 0 states have call successors, (0), 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 60 [2022-07-23 05:36:11,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:11,518 INFO L225 Difference]: With dead ends: 484 [2022-07-23 05:36:11,518 INFO L226 Difference]: Without dead ends: 484 [2022-07-23 05:36:11,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=384, Invalid=1596, Unknown=0, NotChecked=0, Total=1980 [2022-07-23 05:36:11,519 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 616 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1077 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:11,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 750 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1077 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-23 05:36:11,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-07-23 05:36:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 414. [2022-07-23 05:36:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 412 states have (on average 1.1019417475728155) internal successors, (454), 413 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:11,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 454 transitions. [2022-07-23 05:36:11,528 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 454 transitions. Word has length 60 [2022-07-23 05:36:11,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:11,528 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 454 transitions. [2022-07-23 05:36:11,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 4.266666666666667) internal successors, (128), 31 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:11,529 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 454 transitions. [2022-07-23 05:36:11,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-23 05:36:11,529 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:11,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:11,553 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:11,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:11,753 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:11,753 INFO L85 PathProgramCache]: Analyzing trace with hash -662058626, now seen corresponding path program 2 times [2022-07-23 05:36:11,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:11,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403183634] [2022-07-23 05:36:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:11,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:36:11,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:11,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403183634] [2022-07-23 05:36:11,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403183634] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:11,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300786629] [2022-07-23 05:36:11,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:36:11,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:11,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:11,864 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) [2022-07-23 05:36:11,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 05:36:11,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:36:11,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:11,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-23 05:36:11,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:12,114 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:36:12,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:12,254 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 [2022-07-23 05:36:12,278 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:36:12,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300786629] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:12,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:12,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-07-23 05:36:12,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088957452] [2022-07-23 05:36:12,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:12,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-23 05:36:12,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:12,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-23 05:36:12,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:36:12,280 INFO L87 Difference]: Start difference. First operand 414 states and 454 transitions. Second operand has 20 states, 19 states have (on average 6.0) internal successors, (114), 20 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) [2022-07-23 05:36:12,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:12,516 INFO L93 Difference]: Finished difference Result 619 states and 685 transitions. [2022-07-23 05:36:12,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:36:12,517 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 6.0) internal successors, (114), 20 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 60 [2022-07-23 05:36:12,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:12,519 INFO L225 Difference]: With dead ends: 619 [2022-07-23 05:36:12,519 INFO L226 Difference]: Without dead ends: 619 [2022-07-23 05:36:12,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 106 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-07-23 05:36:12,520 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 455 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:12,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 322 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:36:12,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-07-23 05:36:12,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 510. [2022-07-23 05:36:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 508 states have (on average 1.1122047244094488) internal successors, (565), 509 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 565 transitions. [2022-07-23 05:36:12,532 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 565 transitions. Word has length 60 [2022-07-23 05:36:12,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:12,532 INFO L495 AbstractCegarLoop]: Abstraction has 510 states and 565 transitions. [2022-07-23 05:36:12,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 6.0) internal successors, (114), 20 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) [2022-07-23 05:36:12,532 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 565 transitions. [2022-07-23 05:36:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-23 05:36:12,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:12,535 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:12,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:12,755 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,SelfDestructingSolverStorable31 [2022-07-23 05:36:12,755 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:12,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:12,756 INFO L85 PathProgramCache]: Analyzing trace with hash -525028771, now seen corresponding path program 1 times [2022-07-23 05:36:12,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:12,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425819489] [2022-07-23 05:36:12,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:12,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:13,313 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:36:13,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:13,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425819489] [2022-07-23 05:36:13,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425819489] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:13,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916483019] [2022-07-23 05:36:13,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:13,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:13,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:13,319 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) [2022-07-23 05:36:13,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-23 05:36:13,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-23 05:36:13,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:13,512 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 [2022-07-23 05:36:13,743 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 05:36:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:36:13,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:13,848 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 [2022-07-23 05:36:13,850 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 [2022-07-23 05:36:13,970 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:36:13,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916483019] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:13,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:13,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14, 14] total 33 [2022-07-23 05:36:13,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492102659] [2022-07-23 05:36:13,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:13,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-23 05:36:13,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:13,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-23 05:36:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=954, Unknown=0, NotChecked=0, Total=1056 [2022-07-23 05:36:13,975 INFO L87 Difference]: Start difference. First operand 510 states and 565 transitions. Second operand has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:15,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:15,789 INFO L93 Difference]: Finished difference Result 1009 states and 1107 transitions. [2022-07-23 05:36:15,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-23 05:36:15,790 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 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 [2022-07-23 05:36:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:15,793 INFO L225 Difference]: With dead ends: 1009 [2022-07-23 05:36:15,793 INFO L226 Difference]: Without dead ends: 997 [2022-07-23 05:36:15,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 110 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=483, Invalid=3299, Unknown=0, NotChecked=0, Total=3782 [2022-07-23 05:36:15,795 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 546 mSDsluCounter, 979 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:15,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1033 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1085 Invalid, 0 Unknown, 165 Unchecked, 0.5s Time] [2022-07-23 05:36:15,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-07-23 05:36:15,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 640. [2022-07-23 05:36:15,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 638 states have (on average 1.1065830721003134) internal successors, (706), 639 states have internal predecessors, (706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:15,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 706 transitions. [2022-07-23 05:36:15,806 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 706 transitions. Word has length 63 [2022-07-23 05:36:15,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:15,806 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 706 transitions. [2022-07-23 05:36:15,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.0) internal successors, (132), 33 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:15,806 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 706 transitions. [2022-07-23 05:36:15,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-23 05:36:15,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:15,808 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-23 05:36:15,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:16,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:16,031 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:16,032 INFO L85 PathProgramCache]: Analyzing trace with hash 265315897, now seen corresponding path program 8 times [2022-07-23 05:36:16,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:16,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097152123] [2022-07-23 05:36:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:16,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:16,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:16,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097152123] [2022-07-23 05:36:16,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097152123] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:16,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970391271] [2022-07-23 05:36:16,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:36:16,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:16,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:16,243 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) [2022-07-23 05:36:16,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-23 05:36:16,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:36:16,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:16,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-23 05:36:16,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:16,470 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 [2022-07-23 05:36:16,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 05:36:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:16,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:16,703 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 [2022-07-23 05:36:16,704 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 [2022-07-23 05:36:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:16,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970391271] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:16,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:16,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 34 [2022-07-23 05:36:16,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171779326] [2022-07-23 05:36:16,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:16,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-23 05:36:16,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:16,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-23 05:36:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-07-23 05:36:16,819 INFO L87 Difference]: Start difference. First operand 640 states and 706 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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) [2022-07-23 05:36:17,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:17,507 INFO L93 Difference]: Finished difference Result 935 states and 1018 transitions. [2022-07-23 05:36:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-23 05:36:17,507 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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 66 [2022-07-23 05:36:17,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:17,509 INFO L225 Difference]: With dead ends: 935 [2022-07-23 05:36:17,510 INFO L226 Difference]: Without dead ends: 892 [2022-07-23 05:36:17,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 112 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=312, Invalid=2040, Unknown=0, NotChecked=0, Total=2352 [2022-07-23 05:36:17,511 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 609 mSDsluCounter, 1378 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:17,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [609 Valid, 1477 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1135 Invalid, 0 Unknown, 63 Unchecked, 0.4s Time] [2022-07-23 05:36:17,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2022-07-23 05:36:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 758. [2022-07-23 05:36:17,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 756 states have (on average 1.1058201058201058) internal successors, (836), 757 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 836 transitions. [2022-07-23 05:36:17,523 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 836 transitions. Word has length 66 [2022-07-23 05:36:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:17,523 INFO L495 AbstractCegarLoop]: Abstraction has 758 states and 836 transitions. [2022-07-23 05:36:17,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 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) [2022-07-23 05:36:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 836 transitions. [2022-07-23 05:36:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-23 05:36:17,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:17,525 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-23 05:36:17,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:17,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:17,745 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:17,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1055980246, now seen corresponding path program 9 times [2022-07-23 05:36:17,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:17,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85248371] [2022-07-23 05:36:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:17,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:17,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:17,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85248371] [2022-07-23 05:36:17,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85248371] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:17,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838882762] [2022-07-23 05:36:17,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:36:17,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:17,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:17,968 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) [2022-07-23 05:36:17,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-23 05:36:18,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-23 05:36:18,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:18,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-23 05:36:18,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:18,147 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:18,148 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 [2022-07-23 05:36:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:18,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 45 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:19,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838882762] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:19,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:19,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2022-07-23 05:36:19,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281343242] [2022-07-23 05:36:19,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:19,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-23 05:36:19,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:19,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-23 05:36:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1811, Unknown=0, NotChecked=0, Total=2070 [2022-07-23 05:36:19,109 INFO L87 Difference]: Start difference. First operand 758 states and 836 transitions. Second operand has 46 states, 45 states have (on average 4.488888888888889) internal successors, (202), 46 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) [2022-07-23 05:36:20,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:20,265 INFO L93 Difference]: Finished difference Result 974 states and 1064 transitions. [2022-07-23 05:36:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-23 05:36:20,265 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 4.488888888888889) internal successors, (202), 46 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 70 [2022-07-23 05:36:20,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:20,268 INFO L225 Difference]: With dead ends: 974 [2022-07-23 05:36:20,268 INFO L226 Difference]: Without dead ends: 974 [2022-07-23 05:36:20,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=865, Invalid=3425, Unknown=0, NotChecked=0, Total=4290 [2022-07-23 05:36:20,269 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 849 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1307 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 1366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:20,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 896 Invalid, 1366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1307 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-23 05:36:20,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2022-07-23 05:36:20,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 862. [2022-07-23 05:36:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 860 states have (on average 1.1116279069767443) internal successors, (956), 861 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:20,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 956 transitions. [2022-07-23 05:36:20,281 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 956 transitions. Word has length 70 [2022-07-23 05:36:20,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:20,281 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 956 transitions. [2022-07-23 05:36:20,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 4.488888888888889) internal successors, (202), 46 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) [2022-07-23 05:36:20,282 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 956 transitions. [2022-07-23 05:36:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 05:36:20,283 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:20,283 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1] [2022-07-23 05:36:20,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:20,498 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,SelfDestructingSolverStorable34 [2022-07-23 05:36:20,499 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:20,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:20,499 INFO L85 PathProgramCache]: Analyzing trace with hash 2120159335, now seen corresponding path program 3 times [2022-07-23 05:36:20,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:20,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37635565] [2022-07-23 05:36:20,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:20,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:20,657 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:36:20,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:20,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37635565] [2022-07-23 05:36:20,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37635565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:20,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067334588] [2022-07-23 05:36:20,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:36:20,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:20,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:20,660 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) [2022-07-23 05:36:20,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-23 05:36:20,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-23 05:36:20,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:20,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-23 05:36:20,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:20,794 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 [2022-07-23 05:36:20,916 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 [2022-07-23 05:36:20,941 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 [2022-07-23 05:36:21,287 INFO L356 Elim1Store]: treesize reduction 3, result has 75.0 percent of original size [2022-07-23 05:36:21,287 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 [2022-07-23 05:36:21,311 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:36:21,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:21,588 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_695 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_695) |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) 0)) is different from false [2022-07-23 05:36:21,592 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:21,592 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2022-07-23 05:36:21,597 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:21,598 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 [2022-07-23 05:36:21,600 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 [2022-07-23 05:36:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 60 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:36:21,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067334588] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:21,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:21,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 18] total 37 [2022-07-23 05:36:21,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243012772] [2022-07-23 05:36:21,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:21,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-23 05:36:21,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:21,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-23 05:36:21,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1145, Unknown=1, NotChecked=68, Total=1332 [2022-07-23 05:36:21,778 INFO L87 Difference]: Start difference. First operand 862 states and 956 transitions. Second operand has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:22,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:22,093 INFO L93 Difference]: Finished difference Result 1185 states and 1303 transitions. [2022-07-23 05:36:22,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:36:22,094 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 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 73 [2022-07-23 05:36:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:22,096 INFO L225 Difference]: With dead ends: 1185 [2022-07-23 05:36:22,096 INFO L226 Difference]: Without dead ends: 1032 [2022-07-23 05:36:22,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=1558, Unknown=1, NotChecked=80, Total=1806 [2022-07-23 05:36:22,097 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 72 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 670 SdHoareTripleChecker+Invalid, 672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:22,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 670 Invalid, 672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 493 Invalid, 0 Unknown, 175 Unchecked, 0.2s Time] [2022-07-23 05:36:22,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-07-23 05:36:22,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 904. [2022-07-23 05:36:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 902 states have (on average 1.1130820399113082) internal successors, (1004), 903 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:22,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1004 transitions. [2022-07-23 05:36:22,109 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1004 transitions. Word has length 73 [2022-07-23 05:36:22,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:22,109 INFO L495 AbstractCegarLoop]: Abstraction has 904 states and 1004 transitions. [2022-07-23 05:36:22,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.081081081081081) internal successors, (151), 37 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:22,110 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1004 transitions. [2022-07-23 05:36:22,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 05:36:22,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:22,111 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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] [2022-07-23 05:36:22,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:22,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:22,335 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:22,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:22,336 INFO L85 PathProgramCache]: Analyzing trace with hash 553451124, now seen corresponding path program 2 times [2022-07-23 05:36:22,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:22,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230209654] [2022-07-23 05:36:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:22,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 18 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-23 05:36:22,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:22,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230209654] [2022-07-23 05:36:22,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230209654] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:22,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672064729] [2022-07-23 05:36:22,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:36:22,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:22,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:22,640 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) [2022-07-23 05:36:22,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-23 05:36:22,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:36:22,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:22,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-23 05:36:22,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:22,820 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 [2022-07-23 05:36:23,341 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:23,342 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 [2022-07-23 05:36:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:36:23,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:24,033 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 15 treesize of output 13 [2022-07-23 05:36:24,038 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 [2022-07-23 05:36:24,041 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 [2022-07-23 05:36:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 6 proven. 76 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:36:24,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672064729] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:24,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:24,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 46 [2022-07-23 05:36:24,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599289445] [2022-07-23 05:36:24,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:24,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-23 05:36:24,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-23 05:36:24,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1906, Unknown=0, NotChecked=0, Total=2070 [2022-07-23 05:36:24,077 INFO L87 Difference]: Start difference. First operand 904 states and 1004 transitions. Second operand has 46 states, 46 states have (on average 3.891304347826087) internal successors, (179), 46 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:25,923 INFO L93 Difference]: Finished difference Result 1179 states and 1292 transitions. [2022-07-23 05:36:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-23 05:36:25,924 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.891304347826087) internal successors, (179), 46 states have internal predecessors, (179), 0 states have call successors, (0), 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 73 [2022-07-23 05:36:25,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:25,926 INFO L225 Difference]: With dead ends: 1179 [2022-07-23 05:36:25,926 INFO L226 Difference]: Without dead ends: 1145 [2022-07-23 05:36:25,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 128 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=567, Invalid=5285, Unknown=0, NotChecked=0, Total=5852 [2022-07-23 05:36:25,927 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 270 mSDsluCounter, 1139 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 1609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 565 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:25,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 1189 Invalid, 1609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1020 Invalid, 0 Unknown, 565 Unchecked, 0.4s Time] [2022-07-23 05:36:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2022-07-23 05:36:25,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 945. [2022-07-23 05:36:25,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 945 states, 943 states have (on average 1.1113467656415694) internal successors, (1048), 944 states have internal predecessors, (1048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 945 states to 945 states and 1048 transitions. [2022-07-23 05:36:25,944 INFO L78 Accepts]: Start accepts. Automaton has 945 states and 1048 transitions. Word has length 73 [2022-07-23 05:36:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:25,945 INFO L495 AbstractCegarLoop]: Abstraction has 945 states and 1048 transitions. [2022-07-23 05:36:25,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.891304347826087) internal successors, (179), 46 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 945 states and 1048 transitions. [2022-07-23 05:36:25,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 05:36:25,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:25,946 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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] [2022-07-23 05:36:25,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:26,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:26,152 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:26,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash -429292212, now seen corresponding path program 3 times [2022-07-23 05:36:26,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:26,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729557594] [2022-07-23 05:36:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:26,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:26,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:26,424 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 65 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:36:26,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:26,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729557594] [2022-07-23 05:36:26,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729557594] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:26,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781880616] [2022-07-23 05:36:26,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:36:26,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:26,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:26,426 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) [2022-07-23 05:36:26,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-23 05:36:26,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-23 05:36:26,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:26,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-23 05:36:26,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:26,609 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 [2022-07-23 05:36:26,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 05:36:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-23 05:36:26,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:26,956 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 [2022-07-23 05:36:26,958 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 [2022-07-23 05:36:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 17 proven. 50 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-23 05:36:27,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781880616] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:27,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:27,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 31 [2022-07-23 05:36:27,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315417699] [2022-07-23 05:36:27,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:27,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 05:36:27,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:27,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 05:36:27,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=830, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:36:27,057 INFO L87 Difference]: Start difference. First operand 945 states and 1048 transitions. Second operand has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 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) [2022-07-23 05:36:28,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:28,162 INFO L93 Difference]: Finished difference Result 995 states and 1089 transitions. [2022-07-23 05:36:28,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 05:36:28,162 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 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) Word has length 73 [2022-07-23 05:36:28,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:28,164 INFO L225 Difference]: With dead ends: 995 [2022-07-23 05:36:28,164 INFO L226 Difference]: Without dead ends: 989 [2022-07-23 05:36:28,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 710 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=425, Invalid=2767, Unknown=0, NotChecked=0, Total=3192 [2022-07-23 05:36:28,165 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 410 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 1223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:28,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 990 Invalid, 1223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 950 Invalid, 0 Unknown, 231 Unchecked, 0.4s Time] [2022-07-23 05:36:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-07-23 05:36:28,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 902. [2022-07-23 05:36:28,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 900 states have (on average 1.1077777777777778) internal successors, (997), 901 states have internal predecessors, (997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:28,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 997 transitions. [2022-07-23 05:36:28,177 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 997 transitions. Word has length 73 [2022-07-23 05:36:28,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:28,177 INFO L495 AbstractCegarLoop]: Abstraction has 902 states and 997 transitions. [2022-07-23 05:36:28,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 4.483870967741935) internal successors, (139), 31 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) [2022-07-23 05:36:28,178 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 997 transitions. [2022-07-23 05:36:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-23 05:36:28,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:28,179 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:28,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:28,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:28,395 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:28,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:28,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2092129770, now seen corresponding path program 10 times [2022-07-23 05:36:28,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:28,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142738548] [2022-07-23 05:36:28,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:28,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:28,661 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:28,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:28,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142738548] [2022-07-23 05:36:28,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142738548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:28,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867227646] [2022-07-23 05:36:28,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:36:28,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:28,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:28,664 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) [2022-07-23 05:36:28,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-23 05:36:28,772 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:36:28,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:28,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-23 05:36:28,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:28,789 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:28,789 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 [2022-07-23 05:36:29,056 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 [2022-07-23 05:36:29,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:29,472 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 [2022-07-23 05:36:29,476 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 86 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:29,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:29,891 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 [2022-07-23 05:36:29,894 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 [2022-07-23 05:36:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 77 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:30,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867227646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:30,413 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:30,413 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 55 [2022-07-23 05:36:30,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138524587] [2022-07-23 05:36:30,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:30,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-23 05:36:30,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:30,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-23 05:36:30,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2702, Unknown=0, NotChecked=0, Total=2970 [2022-07-23 05:36:30,414 INFO L87 Difference]: Start difference. First operand 902 states and 997 transitions. Second operand has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 55 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:31,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:31,312 INFO L93 Difference]: Finished difference Result 1059 states and 1164 transitions. [2022-07-23 05:36:31,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-23 05:36:31,313 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 55 states have internal predecessors, (208), 0 states have call successors, (0), 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 [2022-07-23 05:36:31,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:31,315 INFO L225 Difference]: With dead ends: 1059 [2022-07-23 05:36:31,315 INFO L226 Difference]: Without dead ends: 1013 [2022-07-23 05:36:31,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=695, Invalid=5947, Unknown=0, NotChecked=0, Total=6642 [2022-07-23 05:36:31,316 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 161 mSDsluCounter, 1193 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 358 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:31,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 1247 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 677 Invalid, 0 Unknown, 358 Unchecked, 0.2s Time] [2022-07-23 05:36:31,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-07-23 05:36:31,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 988. [2022-07-23 05:36:31,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 986 states have (on average 1.1085192697768762) internal successors, (1093), 987 states have internal predecessors, (1093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1093 transitions. [2022-07-23 05:36:31,328 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1093 transitions. Word has length 76 [2022-07-23 05:36:31,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:31,328 INFO L495 AbstractCegarLoop]: Abstraction has 988 states and 1093 transitions. [2022-07-23 05:36:31,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 55 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1093 transitions. [2022-07-23 05:36:31,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-23 05:36:31,330 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:31,331 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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] [2022-07-23 05:36:31,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:31,543 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,SelfDestructingSolverStorable38 [2022-07-23 05:36:31,543 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:31,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:31,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2129461782, now seen corresponding path program 4 times [2022-07-23 05:36:31,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:31,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007956739] [2022-07-23 05:36:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:31,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:36:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:31,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007956739] [2022-07-23 05:36:31,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007956739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:31,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523035113] [2022-07-23 05:36:31,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:36:31,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:31,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:31,680 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) [2022-07-23 05:36:31,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-23 05:36:31,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:36:31,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:31,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-23 05:36:31,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:31,823 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 [2022-07-23 05:36:31,827 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 [2022-07-23 05:36:32,109 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 [2022-07-23 05:36:32,145 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 [2022-07-23 05:36:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:33,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:33,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:33,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:33,603 INFO L356 Elim1Store]: treesize reduction 3, result has 96.3 percent of original size [2022-07-23 05:36:33,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 101 [2022-07-23 05:36:33,759 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 13 proven. 61 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:36:33,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:35,406 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_865 (Array Int Int)) (|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| Int) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_146| Int) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.base_150| Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_865))) (let ((.cse2 (select (select .cse3 |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_150|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_146|)) (.cse0 (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_865 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= (select .cse0 (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| 1)) .cse1)) (not (= (select .cse0 (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| 2)) .cse2)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56|) (not (<= 0 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56|)) (= .cse2 0) (<= (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (= (select .cse0 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56|) .cse1)) (= .cse1 0))))) is different from false [2022-07-23 05:36:35,425 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:35,425 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 114 treesize of output 70 [2022-07-23 05:36:35,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:35,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:35,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:35,458 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:35,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 171 treesize of output 218 [2022-07-23 05:36:35,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:35,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:35,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:35,493 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:35,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 123 treesize of output 157 [2022-07-23 05:36:37,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 59 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-23 05:36:37,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523035113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:37,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:37,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 32, 32] total 72 [2022-07-23 05:36:37,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142066236] [2022-07-23 05:36:37,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:37,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-23 05:36:37,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:37,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-23 05:36:37,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=4367, Unknown=1, NotChecked=140, Total=5256 [2022-07-23 05:36:37,353 INFO L87 Difference]: Start difference. First operand 988 states and 1093 transitions. Second operand has 73 states, 72 states have (on average 2.888888888888889) internal successors, (208), 73 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:38,282 WARN L833 $PredicateComparison]: unable to prove that (and (= 0 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|) (= (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|) |c_ULTIMATE.start_main_~length1~0#1|) (not (= |c_ULTIMATE.start_main_~nondetString1~0#1.base| |c_ULTIMATE.start_main_~nondetString2~0#1.base|)) (= |c_ULTIMATE.start_main_~nondetString1~0#1.offset| 0) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_865 (Array Int Int)) (|v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| Int) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_146| Int) (|v_ULTIMATE.start_cstrpbrk_~s~0#1.base_150| Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_865))) (let ((.cse2 (select (select .cse3 |v_ULTIMATE.start_cstrpbrk_~s~0#1.base_150|) |v_ULTIMATE.start_cstrpbrk_~s~0#1.offset_146|)) (.cse0 (select .cse3 |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (.cse1 (select v_ArrVal_865 |c_ULTIMATE.start_main_~nondetString2~0#1.offset|))) (or (not (= (select .cse0 (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| 1)) .cse1)) (not (= (select .cse0 (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| 2)) .cse2)) (< |c_ULTIMATE.start_main_~nondetString1~0#1.offset| |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56|) (not (<= 0 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56|)) (= .cse2 0) (<= (+ |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56| 4) (select |c_#length| |c_ULTIMATE.start_main_~nondetString1~0#1.base|)) (not (= (select .cse0 |v_ULTIMATE.start_cstrpbrk_~sc1~0#1.offset_56|) .cse1)) (= .cse1 0))))) (not (< |c_ULTIMATE.start_main_~length1~0#1| 1))) is different from false [2022-07-23 05:36:41,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:41,966 INFO L93 Difference]: Finished difference Result 1481 states and 1630 transitions. [2022-07-23 05:36:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-23 05:36:41,966 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 2.888888888888889) internal successors, (208), 73 states have internal predecessors, (208), 0 states have call successors, (0), 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 77 [2022-07-23 05:36:41,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:41,969 INFO L225 Difference]: With dead ends: 1481 [2022-07-23 05:36:41,969 INFO L226 Difference]: Without dead ends: 1481 [2022-07-23 05:36:41,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 105 SyntacticMatches, 5 SemanticMatches, 146 ConstructedPredicates, 2 IntricatePredicates, 3 DeprecatedPredicates, 6451 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3734, Invalid=17442, Unknown=2, NotChecked=578, Total=21756 [2022-07-23 05:36:41,971 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 582 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1670 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:41,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 807 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 582 Invalid, 0 Unknown, 1670 Unchecked, 0.3s Time] [2022-07-23 05:36:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2022-07-23 05:36:41,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1185. [2022-07-23 05:36:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1185 states, 1183 states have (on average 1.1048182586644124) internal successors, (1307), 1184 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1185 states to 1185 states and 1307 transitions. [2022-07-23 05:36:41,985 INFO L78 Accepts]: Start accepts. Automaton has 1185 states and 1307 transitions. Word has length 77 [2022-07-23 05:36:41,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:41,985 INFO L495 AbstractCegarLoop]: Abstraction has 1185 states and 1307 transitions. [2022-07-23 05:36:41,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 2.888888888888889) internal successors, (208), 73 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:41,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1185 states and 1307 transitions. [2022-07-23 05:36:41,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-23 05:36:41,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:41,988 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 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] [2022-07-23 05:36:42,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:42,215 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,SelfDestructingSolverStorable39 [2022-07-23 05:36:42,215 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:42,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1548843218, now seen corresponding path program 5 times [2022-07-23 05:36:42,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:42,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31995477] [2022-07-23 05:36:42,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:42,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:42,327 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:36:42,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:42,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31995477] [2022-07-23 05:36:42,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31995477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:42,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739656480] [2022-07-23 05:36:42,328 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:36:42,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:42,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:42,329 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) [2022-07-23 05:36:42,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-23 05:36:42,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-23 05:36:42,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:42,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-23 05:36:42,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:42,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:36:42,447 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 [2022-07-23 05:36:42,449 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 [2022-07-23 05:36:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:36:42,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 15 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:36:42,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739656480] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:42,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:42,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-07-23 05:36:42,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333287885] [2022-07-23 05:36:42,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:42,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-23 05:36:42,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:42,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-23 05:36:42,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-07-23 05:36:42,979 INFO L87 Difference]: Start difference. First operand 1185 states and 1307 transitions. Second operand has 25 states, 24 states have (on average 7.583333333333333) internal successors, (182), 25 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:43,337 INFO L93 Difference]: Finished difference Result 1796 states and 1991 transitions. [2022-07-23 05:36:43,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 05:36:43,338 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 7.583333333333333) internal successors, (182), 25 states have internal predecessors, (182), 0 states have call successors, (0), 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 77 [2022-07-23 05:36:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:43,341 INFO L225 Difference]: With dead ends: 1796 [2022-07-23 05:36:43,341 INFO L226 Difference]: Without dead ends: 1796 [2022-07-23 05:36:43,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 05:36:43,342 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 383 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:43,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 476 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:36:43,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1796 states. [2022-07-23 05:36:43,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1796 to 1348. [2022-07-23 05:36:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1348 states, 1346 states have (on average 1.1084695393759287) internal successors, (1492), 1347 states have internal predecessors, (1492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1348 states to 1348 states and 1492 transitions. [2022-07-23 05:36:43,357 INFO L78 Accepts]: Start accepts. Automaton has 1348 states and 1492 transitions. Word has length 77 [2022-07-23 05:36:43,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:43,357 INFO L495 AbstractCegarLoop]: Abstraction has 1348 states and 1492 transitions. [2022-07-23 05:36:43,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 7.583333333333333) internal successors, (182), 25 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:43,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1348 states and 1492 transitions. [2022-07-23 05:36:43,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-23 05:36:43,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:43,359 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 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] [2022-07-23 05:36:43,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-23 05:36:43,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:43,583 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:43,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:43,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1870203680, now seen corresponding path program 4 times [2022-07-23 05:36:43,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:43,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248357137] [2022-07-23 05:36:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:43,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:44,186 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 21 proven. 92 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:36:44,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248357137] [2022-07-23 05:36:44,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248357137] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:44,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158079220] [2022-07-23 05:36:44,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:36:44,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:44,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:44,188 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) [2022-07-23 05:36:44,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-23 05:36:44,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:36:44,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:44,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-23 05:36:44,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:44,302 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:44,302 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 [2022-07-23 05:36:44,500 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 [2022-07-23 05:36:44,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:36:44,917 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 [2022-07-23 05:36:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 42 proven. 65 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-23 05:36:44,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:45,333 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 [2022-07-23 05:36:45,336 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 [2022-07-23 05:36:45,745 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 37 proven. 70 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-23 05:36:45,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158079220] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:45,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:45,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17, 17] total 48 [2022-07-23 05:36:45,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194175478] [2022-07-23 05:36:45,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:45,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-23 05:36:45,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:45,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-23 05:36:45,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2078, Unknown=0, NotChecked=0, Total=2256 [2022-07-23 05:36:45,749 INFO L87 Difference]: Start difference. First operand 1348 states and 1492 transitions. Second operand has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 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) [2022-07-23 05:36:47,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:47,638 INFO L93 Difference]: Finished difference Result 1374 states and 1508 transitions. [2022-07-23 05:36:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-23 05:36:47,638 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 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 79 [2022-07-23 05:36:47,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:47,641 INFO L225 Difference]: With dead ends: 1374 [2022-07-23 05:36:47,641 INFO L226 Difference]: Without dead ends: 1311 [2022-07-23 05:36:47,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=740, Invalid=6742, Unknown=0, NotChecked=0, Total=7482 [2022-07-23 05:36:47,642 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 329 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 892 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:47,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 892 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 708 Invalid, 0 Unknown, 229 Unchecked, 0.3s Time] [2022-07-23 05:36:47,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1311 states. [2022-07-23 05:36:47,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1311 to 1216. [2022-07-23 05:36:47,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1214 states have (on average 1.1054365733113674) internal successors, (1342), 1215 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1342 transitions. [2022-07-23 05:36:47,655 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1342 transitions. Word has length 79 [2022-07-23 05:36:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:47,655 INFO L495 AbstractCegarLoop]: Abstraction has 1216 states and 1342 transitions. [2022-07-23 05:36:47,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9791666666666665) internal successors, (191), 48 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) [2022-07-23 05:36:47,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1342 transitions. [2022-07-23 05:36:47,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-23 05:36:47,657 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:47,657 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:47,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:47,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:47,870 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:47,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:47,871 INFO L85 PathProgramCache]: Analyzing trace with hash -882077113, now seen corresponding path program 11 times [2022-07-23 05:36:47,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:47,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043602842] [2022-07-23 05:36:47,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:47,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 28 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:48,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:48,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043602842] [2022-07-23 05:36:48,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043602842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:48,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439445615] [2022-07-23 05:36:48,122 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:36:48,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:48,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:48,124 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) [2022-07-23 05:36:48,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-23 05:36:48,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-23 05:36:48,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:48,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-23 05:36:48,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:48,282 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:48,282 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 [2022-07-23 05:36:48,648 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 45 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:48,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:49,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439445615] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:49,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:49,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 47 [2022-07-23 05:36:49,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452949283] [2022-07-23 05:36:49,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:49,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-23 05:36:49,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:49,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-23 05:36:49,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-07-23 05:36:49,185 INFO L87 Difference]: Start difference. First operand 1216 states and 1342 transitions. Second operand has 48 states, 47 states have (on average 4.723404255319149) internal successors, (222), 48 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) [2022-07-23 05:36:50,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:50,382 INFO L93 Difference]: Finished difference Result 1788 states and 1952 transitions. [2022-07-23 05:36:50,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-23 05:36:50,382 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 4.723404255319149) internal successors, (222), 48 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 80 [2022-07-23 05:36:50,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:50,386 INFO L225 Difference]: With dead ends: 1788 [2022-07-23 05:36:50,386 INFO L226 Difference]: Without dead ends: 1788 [2022-07-23 05:36:50,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=922, Invalid=3500, Unknown=0, NotChecked=0, Total=4422 [2022-07-23 05:36:50,387 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 544 mSDsluCounter, 1337 mSDsCounter, 0 mSdLazyCounter, 2161 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 2161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:50,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1427 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 2161 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-23 05:36:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1788 states. [2022-07-23 05:36:50,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1788 to 1471. [2022-07-23 05:36:50,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1469 states have (on average 1.1123213070115725) internal successors, (1634), 1470 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:50,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 1634 transitions. [2022-07-23 05:36:50,402 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 1634 transitions. Word has length 80 [2022-07-23 05:36:50,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:50,403 INFO L495 AbstractCegarLoop]: Abstraction has 1471 states and 1634 transitions. [2022-07-23 05:36:50,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 4.723404255319149) internal successors, (222), 48 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) [2022-07-23 05:36:50,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 1634 transitions. [2022-07-23 05:36:50,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-07-23 05:36:50,405 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:50,405 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-23 05:36:50,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:50,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:50,627 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:50,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:50,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1484661605, now seen corresponding path program 12 times [2022-07-23 05:36:50,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:50,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525915425] [2022-07-23 05:36:50,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:50,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:50,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:50,910 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:50,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:50,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525915425] [2022-07-23 05:36:50,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525915425] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:50,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175536895] [2022-07-23 05:36:50,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:36:50,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:50,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:50,912 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) [2022-07-23 05:36:50,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-23 05:36:51,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-23 05:36:51,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:51,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-23 05:36:51,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:51,242 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 [2022-07-23 05:36:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:51,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:51,554 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 [2022-07-23 05:36:51,556 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 [2022-07-23 05:36:51,676 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:51,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175536895] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:51,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:51,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 42 [2022-07-23 05:36:51,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562705392] [2022-07-23 05:36:51,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:51,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-23 05:36:51,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:51,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-23 05:36:51,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1592, Unknown=0, NotChecked=0, Total=1722 [2022-07-23 05:36:51,678 INFO L87 Difference]: Start difference. First operand 1471 states and 1634 transitions. Second operand has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:52,812 INFO L93 Difference]: Finished difference Result 2070 states and 2262 transitions. [2022-07-23 05:36:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-23 05:36:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 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 86 [2022-07-23 05:36:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:52,816 INFO L225 Difference]: With dead ends: 2070 [2022-07-23 05:36:52,817 INFO L226 Difference]: Without dead ends: 1933 [2022-07-23 05:36:52,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 149 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=417, Invalid=3243, Unknown=0, NotChecked=0, Total=3660 [2022-07-23 05:36:52,817 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 833 mSDsluCounter, 2367 mSDsCounter, 0 mSdLazyCounter, 2050 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 833 SdHoareTripleChecker+Valid, 2509 SdHoareTripleChecker+Invalid, 2220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:52,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [833 Valid, 2509 Invalid, 2220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2050 Invalid, 0 Unknown, 109 Unchecked, 0.7s Time] [2022-07-23 05:36:52,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2022-07-23 05:36:52,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1728. [2022-07-23 05:36:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1728 states, 1726 states have (on average 1.1123986095017382) internal successors, (1920), 1727 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:52,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1728 states to 1728 states and 1920 transitions. [2022-07-23 05:36:52,833 INFO L78 Accepts]: Start accepts. Automaton has 1728 states and 1920 transitions. Word has length 86 [2022-07-23 05:36:52,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:52,833 INFO L495 AbstractCegarLoop]: Abstraction has 1728 states and 1920 transitions. [2022-07-23 05:36:52,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.5952380952380953) internal successors, (151), 42 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 1728 states and 1920 transitions. [2022-07-23 05:36:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-23 05:36:52,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:52,836 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:36:52,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:53,060 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,SelfDestructingSolverStorable43 [2022-07-23 05:36:53,060 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:53,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:53,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1004507895, now seen corresponding path program 5 times [2022-07-23 05:36:53,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:53,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597439632] [2022-07-23 05:36:53,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:53,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:53,300 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-23 05:36:53,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:53,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597439632] [2022-07-23 05:36:53,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597439632] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:53,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979883392] [2022-07-23 05:36:53,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:36:53,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:53,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:53,304 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) [2022-07-23 05:36:53,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-23 05:36:53,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-23 05:36:53,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:36:53,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-23 05:36:53,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:53,465 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:36:53,465 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 [2022-07-23 05:36:53,689 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 [2022-07-23 05:36:54,104 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:36:54,104 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 17 [2022-07-23 05:36:54,239 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 15 proven. 142 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-23 05:36:54,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:54,752 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 [2022-07-23 05:36:54,754 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 [2022-07-23 05:36:55,113 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 28 proven. 129 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-23 05:36:55,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979883392] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:55,113 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:55,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2022-07-23 05:36:55,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703655695] [2022-07-23 05:36:55,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:55,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-23 05:36:55,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:55,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-23 05:36:55,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=2530, Unknown=0, NotChecked=0, Total=2756 [2022-07-23 05:36:55,114 INFO L87 Difference]: Start difference. First operand 1728 states and 1920 transitions. Second operand has 53 states, 53 states have (on average 4.320754716981132) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:56,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:56,424 INFO L93 Difference]: Finished difference Result 1873 states and 2052 transitions. [2022-07-23 05:36:56,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 05:36:56,424 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.320754716981132) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 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 [2022-07-23 05:36:56,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:56,428 INFO L225 Difference]: With dead ends: 1873 [2022-07-23 05:36:56,428 INFO L226 Difference]: Without dead ends: 1797 [2022-07-23 05:36:56,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=657, Invalid=6315, Unknown=0, NotChecked=0, Total=6972 [2022-07-23 05:36:56,429 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 469 mSDsluCounter, 1419 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1483 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:56,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1483 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1061 Invalid, 0 Unknown, 242 Unchecked, 0.4s Time] [2022-07-23 05:36:56,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1797 states. [2022-07-23 05:36:56,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1797 to 1572. [2022-07-23 05:36:56,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1570 states have (on average 1.1095541401273885) internal successors, (1742), 1571 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:56,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 1742 transitions. [2022-07-23 05:36:56,446 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 1742 transitions. Word has length 89 [2022-07-23 05:36:56,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:56,447 INFO L495 AbstractCegarLoop]: Abstraction has 1572 states and 1742 transitions. [2022-07-23 05:36:56,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.320754716981132) internal successors, (229), 53 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:56,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 1742 transitions. [2022-07-23 05:36:56,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-23 05:36:56,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:56,452 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-23 05:36:56,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:56,675 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,SelfDestructingSolverStorable44 [2022-07-23 05:36:56,675 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:56,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:56,676 INFO L85 PathProgramCache]: Analyzing trace with hash 777978040, now seen corresponding path program 13 times [2022-07-23 05:36:56,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:56,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839080273] [2022-07-23 05:36:56,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:56,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:56,956 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:56,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:36:56,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839080273] [2022-07-23 05:36:56,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839080273] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:36:56,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254458258] [2022-07-23 05:36:56,957 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:36:56,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:36:56,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:36:56,958 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) [2022-07-23 05:36:56,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-23 05:36:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:36:57,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-23 05:36:57,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:36:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:57,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:36:57,759 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 [2022-07-23 05:36:57,799 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 66 proven. 158 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:36:57,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254458258] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:36:57,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:36:57,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 42 [2022-07-23 05:36:57,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262655873] [2022-07-23 05:36:57,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:36:57,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-23 05:36:57,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:36:57,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-23 05:36:57,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1627, Unknown=0, NotChecked=0, Total=1806 [2022-07-23 05:36:57,800 INFO L87 Difference]: Start difference. First operand 1572 states and 1742 transitions. Second operand has 43 states, 42 states have (on average 4.476190476190476) internal successors, (188), 43 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) [2022-07-23 05:36:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:36:59,349 INFO L93 Difference]: Finished difference Result 1930 states and 2106 transitions. [2022-07-23 05:36:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-23 05:36:59,350 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 4.476190476190476) internal successors, (188), 43 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 90 [2022-07-23 05:36:59,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:36:59,353 INFO L225 Difference]: With dead ends: 1930 [2022-07-23 05:36:59,353 INFO L226 Difference]: Without dead ends: 1930 [2022-07-23 05:36:59,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=813, Invalid=3477, Unknown=0, NotChecked=0, Total=4290 [2022-07-23 05:36:59,354 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 883 mSDsluCounter, 1635 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1737 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 05:36:59,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 1737 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2582 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-23 05:36:59,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2022-07-23 05:36:59,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1614. [2022-07-23 05:36:59,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1612 states have (on average 1.1104218362282878) internal successors, (1790), 1613 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:36:59,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 1790 transitions. [2022-07-23 05:36:59,370 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 1790 transitions. Word has length 90 [2022-07-23 05:36:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:36:59,370 INFO L495 AbstractCegarLoop]: Abstraction has 1614 states and 1790 transitions. [2022-07-23 05:36:59,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 4.476190476190476) internal successors, (188), 43 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) [2022-07-23 05:36:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 1790 transitions. [2022-07-23 05:36:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-23 05:36:59,372 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:36:59,373 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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] [2022-07-23 05:36:59,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-23 05:36:59,596 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,SelfDestructingSolverStorable45 [2022-07-23 05:36:59,596 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:36:59,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:36:59,597 INFO L85 PathProgramCache]: Analyzing trace with hash 718300283, now seen corresponding path program 6 times [2022-07-23 05:36:59,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:36:59,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909599480] [2022-07-23 05:36:59,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:36:59,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:36:59,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:37:00,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:00,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909599480] [2022-07-23 05:37:00,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909599480] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:00,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090381905] [2022-07-23 05:37:00,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:37:00,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:00,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:00,274 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) [2022-07-23 05:37:00,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-23 05:37:00,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-23 05:37:00,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:00,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-23 05:37:00,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:00,454 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:00,454 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 [2022-07-23 05:37:00,737 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 [2022-07-23 05:37:00,795 INFO L356 Elim1Store]: treesize reduction 42, result has 19.2 percent of original size [2022-07-23 05:37:00,795 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 26 treesize of output 25 [2022-07-23 05:37:01,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:01,728 INFO L356 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2022-07-23 05:37:01,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 44 treesize of output 43 [2022-07-23 05:37:01,780 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 108 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:37:01,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:02,964 INFO L356 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2022-07-23 05:37:02,965 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 412 treesize of output 368 [2022-07-23 05:37:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:37:03,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090381905] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:03,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:03,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20, 21] total 66 [2022-07-23 05:37:03,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421472304] [2022-07-23 05:37:03,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:03,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-23 05:37:03,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:03,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-23 05:37:03,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=4076, Unknown=0, NotChecked=0, Total=4290 [2022-07-23 05:37:03,807 INFO L87 Difference]: Start difference. First operand 1614 states and 1790 transitions. Second operand has 66 states, 66 states have (on average 3.590909090909091) internal successors, (237), 66 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:06,446 INFO L93 Difference]: Finished difference Result 2337 states and 2565 transitions. [2022-07-23 05:37:06,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-23 05:37:06,446 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.590909090909091) internal successors, (237), 66 states have internal predecessors, (237), 0 states have call successors, (0), 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 90 [2022-07-23 05:37:06,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:06,450 INFO L225 Difference]: With dead ends: 2337 [2022-07-23 05:37:06,450 INFO L226 Difference]: Without dead ends: 2259 [2022-07-23 05:37:06,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=545, Invalid=9961, Unknown=0, NotChecked=0, Total=10506 [2022-07-23 05:37:06,451 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 150 mSDsluCounter, 1990 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 2045 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1246 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:06,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 2045 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 975 Invalid, 0 Unknown, 1246 Unchecked, 0.4s Time] [2022-07-23 05:37:06,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2022-07-23 05:37:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2256. [2022-07-23 05:37:06,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2254 states have (on average 1.1020408163265305) internal successors, (2484), 2255 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 2484 transitions. [2022-07-23 05:37:06,472 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 2484 transitions. Word has length 90 [2022-07-23 05:37:06,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:06,472 INFO L495 AbstractCegarLoop]: Abstraction has 2256 states and 2484 transitions. [2022-07-23 05:37:06,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.590909090909091) internal successors, (237), 66 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:06,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 2484 transitions. [2022-07-23 05:37:06,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-23 05:37:06,475 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:06,475 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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] [2022-07-23 05:37:06,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:06,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:06,684 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:06,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:06,684 INFO L85 PathProgramCache]: Analyzing trace with hash -402551453, now seen corresponding path program 7 times [2022-07-23 05:37:06,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:06,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066259490] [2022-07-23 05:37:06,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:06,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:37:07,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:07,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066259490] [2022-07-23 05:37:07,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066259490] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:07,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729459325] [2022-07-23 05:37:07,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:37:07,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:07,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:07,212 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) [2022-07-23 05:37:07,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-23 05:37:07,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:07,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-23 05:37:07,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:07,593 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 [2022-07-23 05:37:07,642 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:37:07,642 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 [2022-07-23 05:37:07,647 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 [2022-07-23 05:37:11,621 INFO L356 Elim1Store]: treesize reduction 108, result has 70.1 percent of original size [2022-07-23 05:37:11,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 162 treesize of output 330 [2022-07-23 05:37:20,255 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 7 proven. 114 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:37:20,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:22,602 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:22,603 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 161 treesize of output 95 [2022-07-23 05:37:22,651 INFO L356 Elim1Store]: treesize reduction 21, result has 71.2 percent of original size [2022-07-23 05:37:22,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 256 [2022-07-23 05:37:22,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:22,680 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:22,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 case distinctions, treesize of input 196 treesize of output 206 [2022-07-23 05:37:23,343 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:23,344 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 158 treesize of output 92 [2022-07-23 05:37:23,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:23,372 INFO L356 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2022-07-23 05:37:23,372 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 249 treesize of output 212 [2022-07-23 05:37:23,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:23,387 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:23,387 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 168 treesize of output 154 [2022-07-23 05:37:23,885 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 15 proven. 106 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-23 05:37:23,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729459325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:23,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:23,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 32, 32] total 86 [2022-07-23 05:37:23,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523774833] [2022-07-23 05:37:23,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:23,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-23 05:37:23,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:23,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-23 05:37:23,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=6954, Unknown=8, NotChecked=0, Total=7310 [2022-07-23 05:37:23,888 INFO L87 Difference]: Start difference. First operand 2256 states and 2484 transitions. Second operand has 86 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:29,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:29,395 INFO L93 Difference]: Finished difference Result 3800 states and 4174 transitions. [2022-07-23 05:37:29,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-07-23 05:37:29,396 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 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 90 [2022-07-23 05:37:29,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:29,404 INFO L225 Difference]: With dead ends: 3800 [2022-07-23 05:37:29,404 INFO L226 Difference]: Without dead ends: 3754 [2022-07-23 05:37:29,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 130 SyntacticMatches, 4 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4825 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1041, Invalid=20121, Unknown=8, NotChecked=0, Total=21170 [2022-07-23 05:37:29,406 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 263 mSDsluCounter, 2097 mSDsCounter, 0 mSdLazyCounter, 2241 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 2148 SdHoareTripleChecker+Invalid, 3643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1348 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:29,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 2148 Invalid, 3643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2241 Invalid, 0 Unknown, 1348 Unchecked, 0.9s Time] [2022-07-23 05:37:29,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2022-07-23 05:37:29,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 2747. [2022-07-23 05:37:29,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2747 states, 2745 states have (on average 1.107832422586521) internal successors, (3041), 2746 states have internal predecessors, (3041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:29,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2747 states to 2747 states and 3041 transitions. [2022-07-23 05:37:29,427 INFO L78 Accepts]: Start accepts. Automaton has 2747 states and 3041 transitions. Word has length 90 [2022-07-23 05:37:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:29,428 INFO L495 AbstractCegarLoop]: Abstraction has 2747 states and 3041 transitions. [2022-07-23 05:37:29,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.7906976744186047) internal successors, (240), 86 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:29,428 INFO L276 IsEmpty]: Start isEmpty. Operand 2747 states and 3041 transitions. [2022-07-23 05:37:29,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-23 05:37:29,430 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:29,431 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:29,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:29,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-23 05:37:29,655 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:29,655 INFO L85 PathProgramCache]: Analyzing trace with hash 422434722, now seen corresponding path program 6 times [2022-07-23 05:37:29,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:29,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409669461] [2022-07-23 05:37:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:29,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:37:29,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:29,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409669461] [2022-07-23 05:37:29,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409669461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:29,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939603504] [2022-07-23 05:37:29,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:37:29,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:29,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:29,933 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) [2022-07-23 05:37:29,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-23 05:37:30,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-23 05:37:30,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:30,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-23 05:37:30,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:30,282 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 [2022-07-23 05:37:30,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 05:37:30,552 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:37:30,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:30,654 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 [2022-07-23 05:37:30,655 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 [2022-07-23 05:37:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-23 05:37:30,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939603504] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:30,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:30,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 37 [2022-07-23 05:37:30,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424179182] [2022-07-23 05:37:30,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:30,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-23 05:37:30,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:30,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-23 05:37:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2022-07-23 05:37:30,774 INFO L87 Difference]: Start difference. First operand 2747 states and 3041 transitions. Second operand has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:31,632 INFO L93 Difference]: Finished difference Result 3142 states and 3439 transitions. [2022-07-23 05:37:31,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-23 05:37:31,633 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 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 [2022-07-23 05:37:31,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:31,637 INFO L225 Difference]: With dead ends: 3142 [2022-07-23 05:37:31,638 INFO L226 Difference]: Without dead ends: 3084 [2022-07-23 05:37:31,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 165 SyntacticMatches, 5 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=343, Invalid=2519, Unknown=0, NotChecked=0, Total=2862 [2022-07-23 05:37:31,639 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 619 mSDsluCounter, 2061 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 2184 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:31,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 2184 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1482 Invalid, 0 Unknown, 193 Unchecked, 0.5s Time] [2022-07-23 05:37:31,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3084 states. [2022-07-23 05:37:31,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3084 to 2885. [2022-07-23 05:37:31,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2885 states, 2883 states have (on average 1.1057925771765522) internal successors, (3188), 2884 states have internal predecessors, (3188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:31,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2885 states to 2885 states and 3188 transitions. [2022-07-23 05:37:31,663 INFO L78 Accepts]: Start accepts. Automaton has 2885 states and 3188 transitions. Word has length 93 [2022-07-23 05:37:31,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:31,663 INFO L495 AbstractCegarLoop]: Abstraction has 2885 states and 3188 transitions. [2022-07-23 05:37:31,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.594594594594595) internal successors, (170), 37 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:31,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2885 states and 3188 transitions. [2022-07-23 05:37:31,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-23 05:37:31,666 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:31,667 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:31,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:31,883 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,SelfDestructingSolverStorable48 [2022-07-23 05:37:31,883 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:31,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:31,884 INFO L85 PathProgramCache]: Analyzing trace with hash 695913816, now seen corresponding path program 8 times [2022-07-23 05:37:31,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:31,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273342569] [2022-07-23 05:37:31,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:31,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:31,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:37:32,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:32,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273342569] [2022-07-23 05:37:32,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273342569] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:32,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826437940] [2022-07-23 05:37:32,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:37:32,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:32,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:32,056 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) [2022-07-23 05:37:32,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-23 05:37:32,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:37:32,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:32,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-23 05:37:32,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:37:32,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:32,725 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 22 treesize of output 18 [2022-07-23 05:37:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:37:32,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826437940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:32,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:32,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 30 [2022-07-23 05:37:32,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597728391] [2022-07-23 05:37:32,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:32,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-23 05:37:32,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:32,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-23 05:37:32,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:37:32,861 INFO L87 Difference]: Start difference. First operand 2885 states and 3188 transitions. Second operand has 31 states, 30 states have (on average 6.866666666666666) internal successors, (206), 31 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:33,305 INFO L93 Difference]: Finished difference Result 4213 states and 4670 transitions. [2022-07-23 05:37:33,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:37:33,305 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 6.866666666666666) internal successors, (206), 31 states have internal predecessors, (206), 0 states have call successors, (0), 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 94 [2022-07-23 05:37:33,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:33,310 INFO L225 Difference]: With dead ends: 4213 [2022-07-23 05:37:33,311 INFO L226 Difference]: Without dead ends: 4213 [2022-07-23 05:37:33,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=374, Invalid=1348, Unknown=0, NotChecked=0, Total=1722 [2022-07-23 05:37:33,312 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 565 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 798 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:33,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 839 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 798 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-23 05:37:33,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2022-07-23 05:37:33,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 3103. [2022-07-23 05:37:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3103 states, 3101 states have (on average 1.107062237987746) internal successors, (3433), 3102 states have internal predecessors, (3433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3103 states to 3103 states and 3433 transitions. [2022-07-23 05:37:33,351 INFO L78 Accepts]: Start accepts. Automaton has 3103 states and 3433 transitions. Word has length 94 [2022-07-23 05:37:33,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:33,352 INFO L495 AbstractCegarLoop]: Abstraction has 3103 states and 3433 transitions. [2022-07-23 05:37:33,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 6.866666666666666) internal successors, (206), 31 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:33,352 INFO L276 IsEmpty]: Start isEmpty. Operand 3103 states and 3433 transitions. [2022-07-23 05:37:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-23 05:37:33,355 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:33,355 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-07-23 05:37:33,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:33,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-23 05:37:33,579 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:33,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:33,580 INFO L85 PathProgramCache]: Analyzing trace with hash -737545652, now seen corresponding path program 14 times [2022-07-23 05:37:33,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:33,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536089603] [2022-07-23 05:37:33,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:33,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:33,900 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 29 proven. 238 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:33,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:33,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536089603] [2022-07-23 05:37:33,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536089603] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:33,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511214141] [2022-07-23 05:37:33,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:37:33,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:33,903 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) [2022-07-23 05:37:33,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-23 05:37:34,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:37:34,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:34,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-23 05:37:34,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:34,222 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 [2022-07-23 05:37:35,065 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:35,065 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 [2022-07-23 05:37:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 201 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:35,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:36,054 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 [2022-07-23 05:37:36,059 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 [2022-07-23 05:37:36,063 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 [2022-07-23 05:37:36,116 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 66 proven. 201 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:36,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511214141] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:36,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:36,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 63 [2022-07-23 05:37:36,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379918561] [2022-07-23 05:37:36,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:36,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-23 05:37:36,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-23 05:37:36,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2022-07-23 05:37:36,119 INFO L87 Difference]: Start difference. First operand 3103 states and 3433 transitions. Second operand has 63 states, 63 states have (on average 3.857142857142857) internal successors, (243), 63 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:38,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:38,223 INFO L93 Difference]: Finished difference Result 3568 states and 3919 transitions. [2022-07-23 05:37:38,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-23 05:37:38,223 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.857142857142857) internal successors, (243), 63 states have internal predecessors, (243), 0 states have call successors, (0), 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 96 [2022-07-23 05:37:38,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:38,227 INFO L225 Difference]: With dead ends: 3568 [2022-07-23 05:37:38,227 INFO L226 Difference]: Without dead ends: 3507 [2022-07-23 05:37:38,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 181 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1888 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=569, Invalid=6913, Unknown=0, NotChecked=0, Total=7482 [2022-07-23 05:37:38,228 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 729 mSDsluCounter, 3258 mSDsCounter, 0 mSdLazyCounter, 3269 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 3400 SdHoareTripleChecker+Invalid, 4180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 869 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:38,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 3400 Invalid, 4180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3269 Invalid, 0 Unknown, 869 Unchecked, 1.1s Time] [2022-07-23 05:37:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3507 states. [2022-07-23 05:37:38,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3507 to 3294. [2022-07-23 05:37:38,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 3292 states have (on average 1.1081409477521265) internal successors, (3648), 3293 states have internal predecessors, (3648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:38,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 3648 transitions. [2022-07-23 05:37:38,259 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 3648 transitions. Word has length 96 [2022-07-23 05:37:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:38,259 INFO L495 AbstractCegarLoop]: Abstraction has 3294 states and 3648 transitions. [2022-07-23 05:37:38,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.857142857142857) internal successors, (243), 63 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:38,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 3648 transitions. [2022-07-23 05:37:38,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-23 05:37:38,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:38,262 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:38,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:38,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:38,487 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:38,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:38,487 INFO L85 PathProgramCache]: Analyzing trace with hash 281182567, now seen corresponding path program 9 times [2022-07-23 05:37:38,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:38,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139023149] [2022-07-23 05:37:38,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:38,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:39,378 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 7 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:37:39,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:39,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139023149] [2022-07-23 05:37:39,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139023149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:39,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535564063] [2022-07-23 05:37:39,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:37:39,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:39,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:39,379 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) [2022-07-23 05:37:39,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-23 05:37:39,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-23 05:37:39,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:39,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-23 05:37:39,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:39,529 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 [2022-07-23 05:37:39,757 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 [2022-07-23 05:37:39,802 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 [2022-07-23 05:37:40,571 INFO L356 Elim1Store]: treesize reduction 26, result has 33.3 percent of original size [2022-07-23 05:37:40,572 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 33 treesize of output 26 [2022-07-23 05:37:40,610 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-23 05:37:40,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:41,285 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_cstrpbrk_~s~0#1.offset| Int) (v_ArrVal_1410 (Array Int Int)) (|ULTIMATE.start_cstrpbrk_~s~0#1.base| Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetString2~0#1.base| v_ArrVal_1410))) (let ((.cse0 (select (select .cse1 |ULTIMATE.start_cstrpbrk_~s~0#1.base|) |ULTIMATE.start_cstrpbrk_~s~0#1.offset|))) (or (= .cse0 0) (not (= (select (select .cse1 |c_ULTIMATE.start_main_~nondetString1~0#1.base|) (+ 3 |c_ULTIMATE.start_main_~nondetString1~0#1.offset|)) .cse0)))))) is different from false [2022-07-23 05:37:41,291 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:41,291 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 [2022-07-23 05:37:41,304 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:41,305 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 [2022-07-23 05:37:41,312 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:41,312 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 [2022-07-23 05:37:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 7 proven. 137 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-23 05:37:41,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535564063] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:41,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:41,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 20, 20] total 63 [2022-07-23 05:37:41,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416813175] [2022-07-23 05:37:41,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:41,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-23 05:37:41,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:41,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-23 05:37:41,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3600, Unknown=1, NotChecked=120, Total=3906 [2022-07-23 05:37:41,711 INFO L87 Difference]: Start difference. First operand 3294 states and 3648 transitions. Second operand has 63 states, 63 states have (on average 3.8412698412698414) internal successors, (242), 63 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:45,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:45,135 INFO L93 Difference]: Finished difference Result 3719 states and 4102 transitions. [2022-07-23 05:37:45,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-23 05:37:45,135 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.8412698412698414) internal successors, (242), 63 states have internal predecessors, (242), 0 states have call successors, (0), 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 96 [2022-07-23 05:37:45,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:45,138 INFO L225 Difference]: With dead ends: 3719 [2022-07-23 05:37:45,138 INFO L226 Difference]: Without dead ends: 2859 [2022-07-23 05:37:45,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 158 SyntacticMatches, 12 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 5 DeprecatedPredicates, 1999 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=698, Invalid=9205, Unknown=1, NotChecked=196, Total=10100 [2022-07-23 05:37:45,139 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 602 mSDsluCounter, 2272 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 602 SdHoareTripleChecker+Valid, 2342 SdHoareTripleChecker+Invalid, 3173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1101 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:45,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [602 Valid, 2342 Invalid, 3173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1965 Invalid, 0 Unknown, 1101 Unchecked, 0.8s Time] [2022-07-23 05:37:45,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2022-07-23 05:37:45,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2449. [2022-07-23 05:37:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2449 states, 2447 states have (on average 1.1148344912137311) internal successors, (2728), 2448 states have internal predecessors, (2728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2449 states to 2449 states and 2728 transitions. [2022-07-23 05:37:45,160 INFO L78 Accepts]: Start accepts. Automaton has 2449 states and 2728 transitions. Word has length 96 [2022-07-23 05:37:45,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:45,160 INFO L495 AbstractCegarLoop]: Abstraction has 2449 states and 2728 transitions. [2022-07-23 05:37:45,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.8412698412698414) internal successors, (242), 63 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:45,160 INFO L276 IsEmpty]: Start isEmpty. Operand 2449 states and 2728 transitions. [2022-07-23 05:37:45,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-23 05:37:45,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:45,162 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:45,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:45,362 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,SelfDestructingSolverStorable51 [2022-07-23 05:37:45,363 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:45,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:45,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1522113074, now seen corresponding path program 7 times [2022-07-23 05:37:45,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:45,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141233217] [2022-07-23 05:37:45,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:45,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 29 proven. 188 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-23 05:37:45,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:45,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141233217] [2022-07-23 05:37:45,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141233217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:45,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491141291] [2022-07-23 05:37:45,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:37:45,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:45,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:45,616 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) [2022-07-23 05:37:45,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-23 05:37:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:45,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-23 05:37:45,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:45,847 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 [2022-07-23 05:37:46,456 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:46,456 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 [2022-07-23 05:37:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 28 proven. 189 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-23 05:37:46,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:47,312 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 [2022-07-23 05:37:47,315 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 [2022-07-23 05:37:47,317 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 [2022-07-23 05:37:47,357 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 28 proven. 189 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-23 05:37:47,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491141291] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:47,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:47,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 53 [2022-07-23 05:37:47,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469886302] [2022-07-23 05:37:47,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:47,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-23 05:37:47,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:47,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-23 05:37:47,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=2541, Unknown=0, NotChecked=0, Total=2756 [2022-07-23 05:37:47,360 INFO L87 Difference]: Start difference. First operand 2449 states and 2728 transitions. Second operand has 53 states, 53 states have (on average 4.339622641509434) internal successors, (230), 53 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) [2022-07-23 05:37:49,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:49,413 INFO L93 Difference]: Finished difference Result 2651 states and 2913 transitions. [2022-07-23 05:37:49,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-23 05:37:49,414 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 4.339622641509434) internal successors, (230), 53 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 99 [2022-07-23 05:37:49,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:49,416 INFO L225 Difference]: With dead ends: 2651 [2022-07-23 05:37:49,416 INFO L226 Difference]: Without dead ends: 2394 [2022-07-23 05:37:49,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 194 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1643 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=567, Invalid=6239, Unknown=0, NotChecked=0, Total=6806 [2022-07-23 05:37:49,417 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 508 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 1531 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:49,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1858 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1531 Invalid, 0 Unknown, 278 Unchecked, 0.6s Time] [2022-07-23 05:37:49,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2394 states. [2022-07-23 05:37:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2394 to 2097. [2022-07-23 05:37:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2095 states have (on average 1.1093078758949881) internal successors, (2324), 2096 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 2324 transitions. [2022-07-23 05:37:49,437 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 2324 transitions. Word has length 99 [2022-07-23 05:37:49,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:49,437 INFO L495 AbstractCegarLoop]: Abstraction has 2097 states and 2324 transitions. [2022-07-23 05:37:49,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 4.339622641509434) internal successors, (230), 53 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) [2022-07-23 05:37:49,438 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 2324 transitions. [2022-07-23 05:37:49,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-23 05:37:49,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:49,440 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:49,465 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-23 05:37:49,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:49,655 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:49,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:49,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1737904387, now seen corresponding path program 15 times [2022-07-23 05:37:49,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:49,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610267275] [2022-07-23 05:37:49,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:49,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:49,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:50,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:50,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610267275] [2022-07-23 05:37:50,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610267275] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:50,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587090209] [2022-07-23 05:37:50,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:37:50,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:50,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:50,001 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) [2022-07-23 05:37:50,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-23 05:37:50,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-23 05:37:50,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:50,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-23 05:37:50,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:50,499 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 [2022-07-23 05:37:50,696 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-23 05:37:50,699 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:50,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:50,818 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 [2022-07-23 05:37:50,820 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 [2022-07-23 05:37:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-23 05:37:51,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587090209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:37:51,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:37:51,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 46 [2022-07-23 05:37:51,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211678380] [2022-07-23 05:37:51,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:37:51,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-23 05:37:51,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:37:51,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-23 05:37:51,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1932, Unknown=0, NotChecked=0, Total=2070 [2022-07-23 05:37:51,006 INFO L87 Difference]: Start difference. First operand 2097 states and 2324 transitions. Second operand has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:37:52,762 INFO L93 Difference]: Finished difference Result 3645 states and 4014 transitions. [2022-07-23 05:37:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-23 05:37:52,762 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 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 [2022-07-23 05:37:52,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:37:52,766 INFO L225 Difference]: With dead ends: 3645 [2022-07-23 05:37:52,766 INFO L226 Difference]: Without dead ends: 3566 [2022-07-23 05:37:52,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 186 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 3 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=476, Invalid=4216, Unknown=0, NotChecked=0, Total=4692 [2022-07-23 05:37:52,767 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 865 mSDsluCounter, 4303 mSDsCounter, 0 mSdLazyCounter, 3410 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 865 SdHoareTripleChecker+Valid, 4493 SdHoareTripleChecker+Invalid, 3718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:37:52,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [865 Valid, 4493 Invalid, 3718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3410 Invalid, 0 Unknown, 247 Unchecked, 1.1s Time] [2022-07-23 05:37:52,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3566 states. [2022-07-23 05:37:52,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3566 to 2749. [2022-07-23 05:37:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2749 states, 2747 states have (on average 1.113578449217328) internal successors, (3059), 2748 states have internal predecessors, (3059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:52,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2749 states to 2749 states and 3059 transitions. [2022-07-23 05:37:52,791 INFO L78 Accepts]: Start accepts. Automaton has 2749 states and 3059 transitions. Word has length 106 [2022-07-23 05:37:52,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:37:52,791 INFO L495 AbstractCegarLoop]: Abstraction has 2749 states and 3059 transitions. [2022-07-23 05:37:52,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-23 05:37:52,792 INFO L276 IsEmpty]: Start isEmpty. Operand 2749 states and 3059 transitions. [2022-07-23 05:37:52,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-23 05:37:52,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:37:52,794 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:37:52,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-23 05:37:53,019 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,SelfDestructingSolverStorable53 [2022-07-23 05:37:53,019 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2022-07-23 05:37:53,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:37:53,019 INFO L85 PathProgramCache]: Analyzing trace with hash -826314059, now seen corresponding path program 10 times [2022-07-23 05:37:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:37:53,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669639316] [2022-07-23 05:37:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:37:53,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:37:53,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:37:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 9 proven. 178 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:37:53,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:37:53,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669639316] [2022-07-23 05:37:53,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669639316] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:37:53,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893871913] [2022-07-23 05:37:53,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:37:53,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:37:53,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:37:53,404 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) [2022-07-23 05:37:53,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-23 05:37:53,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:37:53,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:37:53,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-23 05:37:53,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:37:53,548 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 [2022-07-23 05:37:53,555 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 [2022-07-23 05:37:53,884 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 [2022-07-23 05:37:53,944 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 [2022-07-23 05:37:57,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-23 05:37:58,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:37:58,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:58,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 17 [2022-07-23 05:37:58,105 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 70 proven. 117 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:37:58,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:37:59,253 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:59,253 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 49 treesize of output 38 [2022-07-23 05:37:59,263 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:59,273 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:59,274 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 68 treesize of output 75 [2022-07-23 05:37:59,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-23 05:37:59,289 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:37:59,289 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 54 treesize of output 56 [2022-07-23 05:38:00,420 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 117 proven. 70 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-23 05:38:00,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893871913] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:38:00,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-23 05:38:00,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27, 28] total 71 [2022-07-23 05:38:00,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626861668] [2022-07-23 05:38:00,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-23 05:38:00,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-23 05:38:00,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:38:00,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-23 05:38:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=4589, Unknown=1, NotChecked=0, Total=4970 [2022-07-23 05:38:00,423 INFO L87 Difference]: Start difference. First operand 2749 states and 3059 transitions. Second operand has 71 states, 71 states have (on average 3.816901408450704) internal successors, (271), 71 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)