./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c -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 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:52:07,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:52:07,366 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:52:07,400 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:52:07,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:52:07,402 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:52:07,403 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:52:07,405 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:52:07,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:52:07,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:52:07,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:52:07,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:52:07,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:52:07,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:52:07,415 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:52:07,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:52:07,418 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:52:07,419 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:52:07,421 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:52:07,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:52:07,426 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:52:07,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:52:07,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:52:07,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:52:07,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:52:07,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:52:07,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:52:07,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:52:07,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:52:07,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:52:07,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:52:07,437 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:52:07,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:52:07,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:52:07,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:52:07,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:52:07,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:52:07,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:52:07,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:52:07,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:52:07,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:52:07,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:52:07,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:52:07,467 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:52:07,468 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:52:07,468 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:52:07,468 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:52:07,469 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:52:07,469 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:52:07,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:52:07,470 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:52:07,470 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:52:07,471 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:52:07,471 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:52:07,471 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:52:07,471 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:52:07,471 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:52:07,471 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:52:07,471 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:52:07,472 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:52:07,472 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:52:07,472 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:52:07,472 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:52:07,472 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:52:07,472 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:52:07,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:52:07,473 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:52:07,473 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:52:07,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:52:07,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:52:07,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:52:07,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:52:07,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:52:07,474 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 05d1274571884b61e0bf3945fec02c622819cbfceb65bf4937493085e5ba6604 [2022-07-20 05:52:07,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:52:07,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:52:07,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:52:07,699 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:52:07,700 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:52:07,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2022-07-20 05:52:07,770 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/188501903/27c476ffed6a4445b16b6f7024d260ef/FLAGa55752113 [2022-07-20 05:52:08,118 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:52:08,118 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-memsafety/ArraysWithLenghtAtDeclaration_-write.c [2022-07-20 05:52:08,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/188501903/27c476ffed6a4445b16b6f7024d260ef/FLAGa55752113 [2022-07-20 05:52:08,131 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/188501903/27c476ffed6a4445b16b6f7024d260ef [2022-07-20 05:52:08,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:52:08,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:52:08,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:52:08,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:52:08,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:52:08,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:52:08" (1/1) ... [2022-07-20 05:52:08,138 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@552fd90d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08, skipping insertion in model container [2022-07-20 05:52:08,138 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:52:08" (1/1) ... [2022-07-20 05:52:08,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:52:08,150 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:52:08,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:52:08,251 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:52:08,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:52:08,273 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:52:08,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08 WrapperNode [2022-07-20 05:52:08,275 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:52:08,276 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:52:08,276 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:52:08,277 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:52:08,282 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08" (1/1) ... [2022-07-20 05:52:08,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08" (1/1) ... [2022-07-20 05:52:08,303 INFO L137 Inliner]: procedures = 8, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2022-07-20 05:52:08,303 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:52:08,304 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:52:08,304 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:52:08,304 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:52:08,309 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08" (1/1) ... [2022-07-20 05:52:08,310 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08" (1/1) ... [2022-07-20 05:52:08,311 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08" (1/1) ... [2022-07-20 05:52:08,311 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08" (1/1) ... [2022-07-20 05:52:08,314 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08" (1/1) ... [2022-07-20 05:52:08,317 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08" (1/1) ... [2022-07-20 05:52:08,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08" (1/1) ... [2022-07-20 05:52:08,319 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:52:08,319 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:52:08,319 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:52:08,319 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:52:08,320 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08" (1/1) ... [2022-07-20 05:52:08,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:52:08,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:08,389 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) [2022-07-20 05:52:08,415 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 [2022-07-20 05:52:08,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 05:52:08,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:52:08,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:52:08,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 05:52:08,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 05:52:08,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:52:08,503 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:52:08,504 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:52:08,610 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:52:08,615 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:52:08,615 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 05:52:08,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:52:08 BoogieIcfgContainer [2022-07-20 05:52:08,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:52:08,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:52:08,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:52:08,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:52:08,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:52:08" (1/3) ... [2022-07-20 05:52:08,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a11a488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:52:08, skipping insertion in model container [2022-07-20 05:52:08,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:52:08" (2/3) ... [2022-07-20 05:52:08,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a11a488 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:52:08, skipping insertion in model container [2022-07-20 05:52:08,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:52:08" (3/3) ... [2022-07-20 05:52:08,623 INFO L111 eAbstractionObserver]: Analyzing ICFG ArraysWithLenghtAtDeclaration_-write.c [2022-07-20 05:52:08,641 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:52:08,663 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2022-07-20 05:52:08,704 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:52:08,709 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@46537327, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f7e4985 [2022-07-20 05:52:08,709 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-07-20 05:52:08,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-20 05:52:08,717 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:08,717 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-20 05:52:08,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:08,721 INFO L85 PathProgramCache]: Analyzing trace with hash 28698920, now seen corresponding path program 1 times [2022-07-20 05:52:08,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:08,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282853048] [2022-07-20 05:52:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:08,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:08,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:08,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:08,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282853048] [2022-07-20 05:52:08,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282853048] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:08,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:08,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:52:08,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666502496] [2022-07-20 05:52:08,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:08,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:52:08,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:08,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:52:08,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:52:08,849 INFO L87 Difference]: Start difference. First operand has 31 states, 22 states have (on average 1.6818181818181819) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 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 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:08,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:08,879 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2022-07-20 05:52:08,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:52:08,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 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 5 [2022-07-20 05:52:08,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:08,886 INFO L225 Difference]: With dead ends: 59 [2022-07-20 05:52:08,886 INFO L226 Difference]: Without dead ends: 55 [2022-07-20 05:52:08,887 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 [2022-07-20 05:52:08,889 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 28 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:08,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 66 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:08,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-20 05:52:08,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 31. [2022-07-20 05:52:08,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:08,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-07-20 05:52:08,910 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 5 [2022-07-20 05:52:08,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:08,910 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-07-20 05:52:08,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:08,911 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-07-20 05:52:08,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 05:52:08,911 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:08,911 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 05:52:08,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:52:08,912 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:08,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:08,914 INFO L85 PathProgramCache]: Analyzing trace with hash 889631015, now seen corresponding path program 1 times [2022-07-20 05:52:08,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:08,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674489318] [2022-07-20 05:52:08,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:08,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:08,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:08,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674489318] [2022-07-20 05:52:08,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674489318] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:08,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:08,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:52:08,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874531742] [2022-07-20 05:52:08,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:08,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:52:08,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:08,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:52:08,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:52:08,950 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:08,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:08,980 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-07-20 05:52:08,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:52:08,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-20 05:52:08,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:08,981 INFO L225 Difference]: With dead ends: 58 [2022-07-20 05:52:08,981 INFO L226 Difference]: Without dead ends: 58 [2022-07-20 05:52:08,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:52:08,982 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 24 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:08,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:08,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-20 05:52:08,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 33. [2022-07-20 05:52:08,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.48) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:08,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-20 05:52:08,987 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-07-20 05:52:08,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:08,987 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-20 05:52:08,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:08,987 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-20 05:52:08,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 05:52:08,988 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:08,988 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 05:52:08,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 05:52:08,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:08,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:08,989 INFO L85 PathProgramCache]: Analyzing trace with hash 889666573, now seen corresponding path program 1 times [2022-07-20 05:52:08,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:08,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569190493] [2022-07-20 05:52:08,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:08,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:09,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:09,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:09,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:09,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569190493] [2022-07-20 05:52:09,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569190493] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:09,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:09,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:52:09,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048928632] [2022-07-20 05:52:09,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:09,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:52:09,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:09,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:52:09,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:52:09,030 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:09,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:09,077 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-07-20 05:52:09,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:52:09,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-20 05:52:09,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:09,085 INFO L225 Difference]: With dead ends: 32 [2022-07-20 05:52:09,086 INFO L226 Difference]: Without dead ends: 32 [2022-07-20 05:52:09,086 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 [2022-07-20 05:52:09,087 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 49 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:09,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 22 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:09,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-20 05:52:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-20 05:52:09,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.44) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-07-20 05:52:09,109 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 6 [2022-07-20 05:52:09,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:09,110 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-07-20 05:52:09,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:09,110 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-07-20 05:52:09,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 05:52:09,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:09,111 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 05:52:09,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 05:52:09,112 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:09,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:09,117 INFO L85 PathProgramCache]: Analyzing trace with hash 889666574, now seen corresponding path program 1 times [2022-07-20 05:52:09,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:09,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499958532] [2022-07-20 05:52:09,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:09,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:09,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:09,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:09,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499958532] [2022-07-20 05:52:09,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499958532] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:09,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:09,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:52:09,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257557610] [2022-07-20 05:52:09,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:09,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:52:09,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:09,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:52:09,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:52:09,200 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:09,260 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-07-20 05:52:09,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:52:09,260 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-20 05:52:09,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:09,261 INFO L225 Difference]: With dead ends: 55 [2022-07-20 05:52:09,261 INFO L226 Difference]: Without dead ends: 55 [2022-07-20 05:52:09,261 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 [2022-07-20 05:52:09,262 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 69 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:09,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 32 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-20 05:52:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 33. [2022-07-20 05:52:09,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:09,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-20 05:52:09,265 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 6 [2022-07-20 05:52:09,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:09,265 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-20 05:52:09,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:09,265 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-20 05:52:09,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:52:09,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:09,266 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:09,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 05:52:09,266 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:09,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:09,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1809810359, now seen corresponding path program 1 times [2022-07-20 05:52:09,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:09,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785475216] [2022-07-20 05:52:09,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:09,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:09,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:09,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:09,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785475216] [2022-07-20 05:52:09,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785475216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:09,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:09,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:52:09,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915335811] [2022-07-20 05:52:09,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:09,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:52:09,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:09,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:52:09,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:52:09,307 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. 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) [2022-07-20 05:52:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:09,348 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-07-20 05:52:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:52:09,348 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 [2022-07-20 05:52:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:09,349 INFO L225 Difference]: With dead ends: 60 [2022-07-20 05:52:09,349 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 05:52:09,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:52:09,350 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:09,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 45 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:09,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 05:52:09,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2022-07-20 05:52:09,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:09,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2022-07-20 05:52:09,353 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 7 [2022-07-20 05:52:09,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:09,353 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2022-07-20 05:52:09,353 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) [2022-07-20 05:52:09,353 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2022-07-20 05:52:09,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-20 05:52:09,354 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:09,354 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:09,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 05:52:09,354 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:09,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:09,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1480744241, now seen corresponding path program 1 times [2022-07-20 05:52:09,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:09,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444673355] [2022-07-20 05:52:09,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:09,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:09,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:09,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444673355] [2022-07-20 05:52:09,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444673355] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:09,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214222844] [2022-07-20 05:52:09,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:09,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:09,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:09,390 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) [2022-07-20 05:52:09,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 05:52:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:09,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-20 05:52:09,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:09,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:09,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:09,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:09,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214222844] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:09,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:09,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-07-20 05:52:09,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583779267] [2022-07-20 05:52:09,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:09,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:52:09,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:09,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:52:09,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:52:09,538 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:09,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:09,596 INFO L93 Difference]: Finished difference Result 130 states and 145 transitions. [2022-07-20 05:52:09,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:52:09,596 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-20 05:52:09,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:09,597 INFO L225 Difference]: With dead ends: 130 [2022-07-20 05:52:09,598 INFO L226 Difference]: Without dead ends: 130 [2022-07-20 05:52:09,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:52:09,598 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 143 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:09,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 143 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:09,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-20 05:52:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 48. [2022-07-20 05:52:09,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 47 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:09,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-07-20 05:52:09,603 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 10 [2022-07-20 05:52:09,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:09,604 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-07-20 05:52:09,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:09,604 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-07-20 05:52:09,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-20 05:52:09,604 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:09,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:09,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:09,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-20 05:52:09,828 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:09,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:09,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1341568839, now seen corresponding path program 1 times [2022-07-20 05:52:09,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:09,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224415924] [2022-07-20 05:52:09,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:09,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:09,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:09,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224415924] [2022-07-20 05:52:09,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224415924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:09,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159899922] [2022-07-20 05:52:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:09,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:09,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:09,891 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) [2022-07-20 05:52:09,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 05:52:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:09,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:52:09,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:10,018 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:52:10,019 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 [2022-07-20 05:52:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:10,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:10,154 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:10,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159899922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:10,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:10,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-20 05:52:10,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518586856] [2022-07-20 05:52:10,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:10,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:52:10,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:52:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:52:10,156 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:10,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:10,300 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2022-07-20 05:52:10,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:52:10,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-20 05:52:10,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:10,301 INFO L225 Difference]: With dead ends: 129 [2022-07-20 05:52:10,301 INFO L226 Difference]: Without dead ends: 129 [2022-07-20 05:52:10,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-07-20 05:52:10,302 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 396 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:10,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 100 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:10,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-20 05:52:10,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 49. [2022-07-20 05:52:10,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.3333333333333333) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2022-07-20 05:52:10,306 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 11 [2022-07-20 05:52:10,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:10,307 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2022-07-20 05:52:10,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 10 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:10,307 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2022-07-20 05:52:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 05:52:10,307 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:10,307 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:10,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:10,523 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,SelfDestructingSolverStorable6 [2022-07-20 05:52:10,523 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1361088610, now seen corresponding path program 1 times [2022-07-20 05:52:10,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:10,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123892342] [2022-07-20 05:52:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:10,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:10,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:10,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:10,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123892342] [2022-07-20 05:52:10,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123892342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:10,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288338747] [2022-07-20 05:52:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:10,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:10,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:10,568 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) [2022-07-20 05:52:10,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 05:52:10,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:10,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 05:52:10,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:10,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:10,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:10,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288338747] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:10,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:10,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-20 05:52:10,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210424101] [2022-07-20 05:52:10,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:10,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:52:10,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:10,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:52:10,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:52:10,671 INFO L87 Difference]: Start difference. First operand 49 states and 56 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) [2022-07-20 05:52:10,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:10,774 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-07-20 05:52:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:52:10,774 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 12 [2022-07-20 05:52:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:10,777 INFO L225 Difference]: With dead ends: 88 [2022-07-20 05:52:10,777 INFO L226 Difference]: Without dead ends: 88 [2022-07-20 05:52:10,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2022-07-20 05:52:10,780 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:10,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 52 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:10,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-20 05:52:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 48. [2022-07-20 05:52:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 47 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-07-20 05:52:10,786 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 12 [2022-07-20 05:52:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:10,787 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-07-20 05:52:10,787 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) [2022-07-20 05:52:10,787 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-07-20 05:52:10,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:52:10,788 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:10,788 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:10,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:11,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:11,004 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:11,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:11,005 INFO L85 PathProgramCache]: Analyzing trace with hash 4840471, now seen corresponding path program 2 times [2022-07-20 05:52:11,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:11,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069683497] [2022-07-20 05:52:11,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:11,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-20 05:52:11,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:11,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069683497] [2022-07-20 05:52:11,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069683497] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:11,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:11,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 05:52:11,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108003707] [2022-07-20 05:52:11,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:11,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:52:11,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:11,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:52:11,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:52:11,081 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:11,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:11,092 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-07-20 05:52:11,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:52:11,092 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 17 [2022-07-20 05:52:11,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:11,092 INFO L225 Difference]: With dead ends: 46 [2022-07-20 05:52:11,092 INFO L226 Difference]: Without dead ends: 46 [2022-07-20 05:52:11,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:52:11,093 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:11,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 22 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:11,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-20 05:52:11,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-07-20 05:52:11,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 45 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:11,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-07-20 05:52:11,096 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 17 [2022-07-20 05:52:11,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:11,096 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-07-20 05:52:11,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:11,096 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-07-20 05:52:11,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-20 05:52:11,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:11,097 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:11,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-20 05:52:11,097 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:11,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:11,097 INFO L85 PathProgramCache]: Analyzing trace with hash 4840472, now seen corresponding path program 1 times [2022-07-20 05:52:11,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:11,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126825081] [2022-07-20 05:52:11,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:11,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:11,167 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:11,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:11,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126825081] [2022-07-20 05:52:11,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126825081] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:11,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:52:11,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:52:11,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751597710] [2022-07-20 05:52:11,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:11,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:52:11,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:11,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:52:11,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:52:11,168 INFO L87 Difference]: Start difference. First operand 46 states and 51 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) [2022-07-20 05:52:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:11,195 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2022-07-20 05:52:11,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:52:11,195 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 17 [2022-07-20 05:52:11,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:11,196 INFO L225 Difference]: With dead ends: 76 [2022-07-20 05:52:11,196 INFO L226 Difference]: Without dead ends: 76 [2022-07-20 05:52:11,196 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 [2022-07-20 05:52:11,196 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:11,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 46 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:11,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-20 05:52:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2022-07-20 05:52:11,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2238805970149254) internal successors, (82), 71 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-07-20 05:52:11,212 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 17 [2022-07-20 05:52:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:11,213 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-07-20 05:52:11,213 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) [2022-07-20 05:52:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-07-20 05:52:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-20 05:52:11,213 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:11,213 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:11,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 05:52:11,213 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:11,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:11,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1949815299, now seen corresponding path program 1 times [2022-07-20 05:52:11,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:11,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503551523] [2022-07-20 05:52:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:11,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:11,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:11,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:11,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503551523] [2022-07-20 05:52:11,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503551523] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:11,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416328482] [2022-07-20 05:52:11,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:11,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:11,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:11,292 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) [2022-07-20 05:52:11,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 05:52:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:11,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 05:52:11,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:11,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:11,466 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 28 treesize of output 24 [2022-07-20 05:52:11,513 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:11,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416328482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:11,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:11,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-07-20 05:52:11,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934955657] [2022-07-20 05:52:11,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:11,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:52:11,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:11,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:52:11,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:52:11,516 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:11,576 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2022-07-20 05:52:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:52:11,577 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-20 05:52:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:11,577 INFO L225 Difference]: With dead ends: 80 [2022-07-20 05:52:11,577 INFO L226 Difference]: Without dead ends: 80 [2022-07-20 05:52:11,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:52:11,578 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:11,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 41 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-20 05:52:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2022-07-20 05:52:11,581 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) [2022-07-20 05:52:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2022-07-20 05:52:11,581 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 23 [2022-07-20 05:52:11,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:11,582 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2022-07-20 05:52:11,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2022-07-20 05:52:11,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-20 05:52:11,583 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:11,583 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1] [2022-07-20 05:52:11,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-20 05:52:11,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:11,799 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:11,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:11,800 INFO L85 PathProgramCache]: Analyzing trace with hash 634835432, now seen corresponding path program 2 times [2022-07-20 05:52:11,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:11,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037676] [2022-07-20 05:52:11,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:11,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:11,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 05:52:11,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:11,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037676] [2022-07-20 05:52:11,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:11,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97508867] [2022-07-20 05:52:11,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:52:11,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:11,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:11,856 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) [2022-07-20 05:52:11,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 05:52:11,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:52:11,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:11,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 05:52:11,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:11,984 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:11,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:52:11,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97508867] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:11,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:52:11,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2022-07-20 05:52:11,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766424277] [2022-07-20 05:52:11,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:11,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:52:11,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:11,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:52:11,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:52:11,986 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:12,049 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-07-20 05:52:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:52:12,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-20 05:52:12,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:12,050 INFO L225 Difference]: With dead ends: 86 [2022-07-20 05:52:12,050 INFO L226 Difference]: Without dead ends: 86 [2022-07-20 05:52:12,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:52:12,051 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:12,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 44 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:12,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-20 05:52:12,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2022-07-20 05:52:12,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 60 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:12,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 66 transitions. [2022-07-20 05:52:12,059 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 66 transitions. Word has length 25 [2022-07-20 05:52:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:12,060 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 66 transitions. [2022-07-20 05:52:12,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:12,061 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 66 transitions. [2022-07-20 05:52:12,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-20 05:52:12,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:12,067 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:12,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:12,284 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,SelfDestructingSolverStorable11 [2022-07-20 05:52:12,284 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:12,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:12,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1809865305, now seen corresponding path program 1 times [2022-07-20 05:52:12,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:12,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033508414] [2022-07-20 05:52:12,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:12,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:12,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:12,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:12,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033508414] [2022-07-20 05:52:12,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033508414] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:12,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656824739] [2022-07-20 05:52:12,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:12,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:12,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:12,330 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) [2022-07-20 05:52:12,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 05:52:12,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:12,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-20 05:52:12,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:52:12,541 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:52:12,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656824739] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:12,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:52:12,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-07-20 05:52:12,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47201650] [2022-07-20 05:52:12,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:12,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:52:12,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:12,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:52:12,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:52:12,542 INFO L87 Difference]: Start difference. First operand 61 states and 66 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:12,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:12,543 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2022-07-20 05:52:12,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:52:12,543 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-20 05:52:12,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:12,544 INFO L225 Difference]: With dead ends: 62 [2022-07-20 05:52:12,544 INFO L226 Difference]: Without dead ends: 60 [2022-07-20 05:52:12,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:52:12,544 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:12,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 39 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 13 Unchecked, 0.0s Time] [2022-07-20 05:52:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-20 05:52:12,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-20 05:52:12,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 59 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) [2022-07-20 05:52:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2022-07-20 05:52:12,546 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 26 [2022-07-20 05:52:12,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:12,546 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2022-07-20 05:52:12,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:12,546 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2022-07-20 05:52:12,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-20 05:52:12,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:12,547 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] [2022-07-20 05:52:12,563 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-20 05:52:12,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:12,759 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:12,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:12,760 INFO L85 PathProgramCache]: Analyzing trace with hash -271127104, now seen corresponding path program 1 times [2022-07-20 05:52:12,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:12,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097896640] [2022-07-20 05:52:12,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:12,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 05:52:12,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:12,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097896640] [2022-07-20 05:52:12,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097896640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:12,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003215068] [2022-07-20 05:52:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:12,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:12,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:12,803 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) [2022-07-20 05:52:12,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 05:52:12,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:12,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 05:52:12,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:12,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:52:12,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 05:52:12,978 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:52:12,978 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 10 [2022-07-20 05:52:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:12,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:13,027 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 14 treesize of output 12 [2022-07-20 05:52:13,031 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 24 [2022-07-20 05:52:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:52:13,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003215068] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:13,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:13,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 11, 11] total 22 [2022-07-20 05:52:13,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145688015] [2022-07-20 05:52:13,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:13,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 05:52:13,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:13,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 05:52:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:52:13,150 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:13,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:13,373 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2022-07-20 05:52:13,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:52:13,373 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 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 [2022-07-20 05:52:13,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:13,373 INFO L225 Difference]: With dead ends: 101 [2022-07-20 05:52:13,373 INFO L226 Difference]: Without dead ends: 101 [2022-07-20 05:52:13,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=649, Unknown=0, NotChecked=0, Total=870 [2022-07-20 05:52:13,374 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:13,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 156 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:13,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-20 05:52:13,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 66. [2022-07-20 05:52:13,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 65 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:13,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2022-07-20 05:52:13,376 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 27 [2022-07-20 05:52:13,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:13,376 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2022-07-20 05:52:13,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 22 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:13,377 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2022-07-20 05:52:13,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-20 05:52:13,377 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:13,377 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:13,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:13,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:13,578 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:13,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:13,578 INFO L85 PathProgramCache]: Analyzing trace with hash 164722723, now seen corresponding path program 1 times [2022-07-20 05:52:13,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:13,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238960323] [2022-07-20 05:52:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:13,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:13,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:13,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238960323] [2022-07-20 05:52:13,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238960323] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:13,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283182727] [2022-07-20 05:52:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:13,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:13,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:13,650 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) [2022-07-20 05:52:13,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 05:52:13,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 05:52:13,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:13,770 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:13,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:13,831 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 32 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-20 05:52:13,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283182727] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:13,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:13,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-07-20 05:52:13,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354540724] [2022-07-20 05:52:13,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:13,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 05:52:13,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:13,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 05:52:13,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-07-20 05:52:13,833 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:14,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:14,033 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-07-20 05:52:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:52:14,033 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 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 34 [2022-07-20 05:52:14,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:14,033 INFO L225 Difference]: With dead ends: 66 [2022-07-20 05:52:14,034 INFO L226 Difference]: Without dead ends: 66 [2022-07-20 05:52:14,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-07-20 05:52:14,036 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:14,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 71 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:14,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-20 05:52:14,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-07-20 05:52:14,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 65 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) [2022-07-20 05:52:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-07-20 05:52:14,040 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2022-07-20 05:52:14,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:14,042 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-07-20 05:52:14,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:14,042 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-07-20 05:52:14,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-20 05:52:14,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:14,045 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:14,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-20 05:52:14,265 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,SelfDestructingSolverStorable14 [2022-07-20 05:52:14,266 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:14,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:14,266 INFO L85 PathProgramCache]: Analyzing trace with hash 882673172, now seen corresponding path program 2 times [2022-07-20 05:52:14,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:14,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263704391] [2022-07-20 05:52:14,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:14,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:14,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:14,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263704391] [2022-07-20 05:52:14,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263704391] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:14,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247156053] [2022-07-20 05:52:14,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:52:14,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:14,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:14,424 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) [2022-07-20 05:52:14,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 05:52:14,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:52:14,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:14,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 05:52:14,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:14,486 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:52:14,486 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 [2022-07-20 05:52:14,494 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 [2022-07-20 05:52:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:14,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:14,772 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:14,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247156053] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:14,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:14,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 3] total 10 [2022-07-20 05:52:14,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881305803] [2022-07-20 05:52:14,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:14,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:52:14,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:14,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:52:14,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:52:14,774 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:14,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:14,909 INFO L93 Difference]: Finished difference Result 158 states and 169 transitions. [2022-07-20 05:52:14,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:52:14,909 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-20 05:52:14,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:14,910 INFO L225 Difference]: With dead ends: 158 [2022-07-20 05:52:14,910 INFO L226 Difference]: Without dead ends: 158 [2022-07-20 05:52:14,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:52:14,911 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 51 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:14,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 93 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:14,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-20 05:52:14,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2022-07-20 05:52:14,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.1517241379310346) internal successors, (167), 149 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:14,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 167 transitions. [2022-07-20 05:52:14,914 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 167 transitions. Word has length 39 [2022-07-20 05:52:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:14,915 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 167 transitions. [2022-07-20 05:52:14,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 167 transitions. [2022-07-20 05:52:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-20 05:52:14,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:14,915 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:14,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:15,133 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,SelfDestructingSolverStorable15 [2022-07-20 05:52:15,134 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:15,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:15,134 INFO L85 PathProgramCache]: Analyzing trace with hash -890031373, now seen corresponding path program 1 times [2022-07-20 05:52:15,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:15,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881288438] [2022-07-20 05:52:15,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:15,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:15,208 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 19 proven. 67 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-20 05:52:15,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:15,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881288438] [2022-07-20 05:52:15,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881288438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:15,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110360622] [2022-07-20 05:52:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:15,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:15,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:15,224 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) [2022-07-20 05:52:15,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 05:52:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:15,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:52:15,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:15,362 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:52:15,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 37 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:52:15,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110360622] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:15,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:15,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 15 [2022-07-20 05:52:15,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759881657] [2022-07-20 05:52:15,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:15,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 05:52:15,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:15,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 05:52:15,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2022-07-20 05:52:15,398 INFO L87 Difference]: Start difference. First operand 150 states and 167 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:15,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:15,563 INFO L93 Difference]: Finished difference Result 165 states and 178 transitions. [2022-07-20 05:52:15,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:52:15,564 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-20 05:52:15,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:15,564 INFO L225 Difference]: With dead ends: 165 [2022-07-20 05:52:15,564 INFO L226 Difference]: Without dead ends: 165 [2022-07-20 05:52:15,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:52:15,565 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 165 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:15,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 67 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-20 05:52:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 143. [2022-07-20 05:52:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.1304347826086956) internal successors, (156), 142 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 156 transitions. [2022-07-20 05:52:15,568 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 156 transitions. Word has length 42 [2022-07-20 05:52:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:15,568 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 156 transitions. [2022-07-20 05:52:15,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 156 transitions. [2022-07-20 05:52:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-20 05:52:15,569 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:15,569 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:15,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:15,795 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,SelfDestructingSolverStorable16 [2022-07-20 05:52:15,795 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:15,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:15,796 INFO L85 PathProgramCache]: Analyzing trace with hash -255177540, now seen corresponding path program 2 times [2022-07-20 05:52:15,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:15,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488877900] [2022-07-20 05:52:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:15,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:15,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:15,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:15,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488877900] [2022-07-20 05:52:15,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488877900] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:15,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413867958] [2022-07-20 05:52:15,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:52:15,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:15,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:15,908 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) [2022-07-20 05:52:15,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 05:52:15,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:52:15,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:15,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:52:15,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:16,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:16,162 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 25 treesize of output 21 [2022-07-20 05:52:16,261 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 40 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:16,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413867958] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:16,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:16,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2022-07-20 05:52:16,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105943025] [2022-07-20 05:52:16,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:16,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:52:16,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:16,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:52:16,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:52:16,263 INFO L87 Difference]: Start difference. First operand 143 states and 156 transitions. Second operand has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:16,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:16,323 INFO L93 Difference]: Finished difference Result 146 states and 159 transitions. [2022-07-20 05:52:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 05:52:16,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 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 49 [2022-07-20 05:52:16,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:16,324 INFO L225 Difference]: With dead ends: 146 [2022-07-20 05:52:16,324 INFO L226 Difference]: Without dead ends: 146 [2022-07-20 05:52:16,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:52:16,325 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 216 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:16,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 80 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-20 05:52:16,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2022-07-20 05:52:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.129496402877698) internal successors, (157), 143 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:16,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 157 transitions. [2022-07-20 05:52:16,328 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 157 transitions. Word has length 49 [2022-07-20 05:52:16,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:16,328 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 157 transitions. [2022-07-20 05:52:16,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.882352941176471) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:16,328 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 157 transitions. [2022-07-20 05:52:16,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-20 05:52:16,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:16,328 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-07-20 05:52:16,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:16,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 05:52:16,529 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:16,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1256352513, now seen corresponding path program 3 times [2022-07-20 05:52:16,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:16,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051497454] [2022-07-20 05:52:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:16,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:16,608 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-20 05:52:16,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051497454] [2022-07-20 05:52:16,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051497454] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:16,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726189637] [2022-07-20 05:52:16,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:52:16,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:16,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:16,624 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) [2022-07-20 05:52:16,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 05:52:16,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 05:52:16,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:16,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 05:52:16,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:16,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:52:16,691 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 [2022-07-20 05:52:16,694 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 [2022-07-20 05:52:16,848 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 11 treesize of output 3 [2022-07-20 05:52:16,906 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-07-20 05:52:16,906 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:52:16,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726189637] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:52:16,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:52:16,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2022-07-20 05:52:16,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056329126] [2022-07-20 05:52:16,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:52:16,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 05:52:16,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:16,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 05:52:16,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:52:16,908 INFO L87 Difference]: Start difference. First operand 144 states and 157 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:16,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:16,937 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2022-07-20 05:52:16,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:52:16,938 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 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 53 [2022-07-20 05:52:16,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:16,938 INFO L225 Difference]: With dead ends: 142 [2022-07-20 05:52:16,938 INFO L226 Difference]: Without dead ends: 142 [2022-07-20 05:52:16,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:52:16,939 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 45 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:16,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 31 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:52:16,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-20 05:52:16,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 80. [2022-07-20 05:52:16,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 77 states have (on average 1.077922077922078) internal successors, (83), 79 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) [2022-07-20 05:52:16,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-07-20 05:52:16,941 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 53 [2022-07-20 05:52:16,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:16,942 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-07-20 05:52:16,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:16,942 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-07-20 05:52:16,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-20 05:52:16,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:16,942 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:52:16,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:17,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:17,155 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:17,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:17,156 INFO L85 PathProgramCache]: Analyzing trace with hash -292223690, now seen corresponding path program 1 times [2022-07-20 05:52:17,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:17,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118154690] [2022-07-20 05:52:17,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:17,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-07-20 05:52:17,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:17,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118154690] [2022-07-20 05:52:17,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118154690] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:17,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161275356] [2022-07-20 05:52:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:17,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:17,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:17,196 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) [2022-07-20 05:52:17,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 05:52:17,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:17,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 05:52:17,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:17,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 05:52:17,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:52:17,426 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 23 treesize of output 22 [2022-07-20 05:52:17,457 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 19 treesize of output 7 [2022-07-20 05:52:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 44 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-20 05:52:17,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:19,569 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~1#1_51| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_51|)) (forall ((v_ArrVal_332 Int)) (< 1 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_51| 4)) v_ArrVal_332) |c_ULTIMATE.start_main_~#b~0#1.offset|))))) is different from false [2022-07-20 05:52:19,600 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 21 treesize of output 19 [2022-07-20 05:52:19,603 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 68 treesize of output 66 [2022-07-20 05:52:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 11 proven. 42 refuted. 0 times theorem prover too weak. 20 trivial. 2 not checked. [2022-07-20 05:52:19,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161275356] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:19,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:19,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 13] total 25 [2022-07-20 05:52:19,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571679101] [2022-07-20 05:52:19,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:19,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-20 05:52:19,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:19,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-20 05:52:19,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=451, Unknown=1, NotChecked=44, Total=600 [2022-07-20 05:52:19,748 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:21,876 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~1#1_51| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_51|)) (forall ((v_ArrVal_332 Int)) (< 1 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_51| 4)) v_ArrVal_332) |c_ULTIMATE.start_main_~#b~0#1.offset|))))) (<= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)))) (<= 2 |c_ULTIMATE.start_main_#t~ret3#1|) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (<= 2 |c_ULTIMATE.start_foo_#res#1|) (= |c_ULTIMATE.start_main_~i~1#1| 0) (<= 2 |c_ULTIMATE.start_foo_~i~0#1|)) is different from false [2022-07-20 05:52:23,879 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~1#1_51| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~1#1| 1) |v_ULTIMATE.start_main_~i~1#1_51|)) (forall ((v_ArrVal_332 Int)) (< 1 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~1#1_51| 4)) v_ArrVal_332) |c_ULTIMATE.start_main_~#b~0#1.offset|))))) (<= 2 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |c_ULTIMATE.start_main_~i~1#1| 4)))) (= |c_ULTIMATE.start_main_~#b~0#1.offset| 0) (= |c_ULTIMATE.start_main_~i~1#1| 0)) is different from false [2022-07-20 05:52:23,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:23,919 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2022-07-20 05:52:23,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:52:23,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 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 54 [2022-07-20 05:52:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:23,920 INFO L225 Difference]: With dead ends: 71 [2022-07-20 05:52:23,920 INFO L226 Difference]: Without dead ends: 67 [2022-07-20 05:52:23,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=148, Invalid=563, Unknown=3, NotChecked=156, Total=870 [2022-07-20 05:52:23,921 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:23,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 52 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 256 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-07-20 05:52:23,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-20 05:52:23,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-07-20 05:52:23,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 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) [2022-07-20 05:52:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-07-20 05:52:23,922 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 54 [2022-07-20 05:52:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:23,922 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-07-20 05:52:23,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.08) internal successors, (102), 25 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:23,922 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-07-20 05:52:23,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 05:52:23,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:23,923 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2022-07-20 05:52:23,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:24,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-07-20 05:52:24,123 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:24,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash 11435127, now seen corresponding path program 2 times [2022-07-20 05:52:24,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:24,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271077749] [2022-07-20 05:52:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:24,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 117 proven. 102 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-20 05:52:24,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:24,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271077749] [2022-07-20 05:52:24,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271077749] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:24,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167920161] [2022-07-20 05:52:24,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:52:24,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:24,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:24,256 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) [2022-07-20 05:52:24,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 05:52:24,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:52:24,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:24,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 05:52:24,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:24,453 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:24,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:24,522 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 43 proven. 159 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 05:52:24,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167920161] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:24,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:24,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 20 [2022-07-20 05:52:24,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229142829] [2022-07-20 05:52:24,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:24,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 05:52:24,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:24,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 05:52:24,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-07-20 05:52:24,524 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:24,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:24,891 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2022-07-20 05:52:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 05:52:24,891 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 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 64 [2022-07-20 05:52:24,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:24,892 INFO L225 Difference]: With dead ends: 108 [2022-07-20 05:52:24,892 INFO L226 Difference]: Without dead ends: 108 [2022-07-20 05:52:24,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=963, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:52:24,893 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 190 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:24,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 73 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:52:24,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-20 05:52:24,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2022-07-20 05:52:24,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 93 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:24,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-07-20 05:52:24,895 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 64 [2022-07-20 05:52:24,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:24,896 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-07-20 05:52:24,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.35) internal successors, (107), 20 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:24,896 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-07-20 05:52:24,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-20 05:52:24,896 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:24,896 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-20 05:52:24,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:25,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:25,113 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:25,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:25,114 INFO L85 PathProgramCache]: Analyzing trace with hash -875547996, now seen corresponding path program 3 times [2022-07-20 05:52:25,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:25,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672506971] [2022-07-20 05:52:25,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:25,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:25,200 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-20 05:52:25,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:25,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672506971] [2022-07-20 05:52:25,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672506971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:25,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158684165] [2022-07-20 05:52:25,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:52:25,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:25,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:25,202 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) [2022-07-20 05:52:25,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 05:52:25,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-20 05:52:25,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:25,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 05:52:25,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-20 05:52:25,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:25,426 INFO L134 CoverageAnalysis]: Checked inductivity of 482 backedges. 213 proven. 38 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-20 05:52:25,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158684165] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:25,426 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:25,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2022-07-20 05:52:25,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986010437] [2022-07-20 05:52:25,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:25,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 05:52:25,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:25,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 05:52:25,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:52:25,427 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 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) [2022-07-20 05:52:25,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:25,575 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2022-07-20 05:52:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:52:25,576 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 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) Word has length 91 [2022-07-20 05:52:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:25,577 INFO L225 Difference]: With dead ends: 164 [2022-07-20 05:52:25,577 INFO L226 Difference]: Without dead ends: 164 [2022-07-20 05:52:25,577 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:52:25,577 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 278 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:25,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 99 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:25,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-20 05:52:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2022-07-20 05:52:25,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 121 states have (on average 1.1322314049586777) internal successors, (137), 122 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2022-07-20 05:52:25,579 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 91 [2022-07-20 05:52:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:25,580 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2022-07-20 05:52:25,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.611111111111111) internal successors, (83), 19 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) [2022-07-20 05:52:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2022-07-20 05:52:25,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-20 05:52:25,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:25,580 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-20 05:52:25,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-20 05:52:25,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:25,787 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:25,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:25,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1372184046, now seen corresponding path program 1 times [2022-07-20 05:52:25,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:25,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163428864] [2022-07-20 05:52:25,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:25,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-20 05:52:25,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163428864] [2022-07-20 05:52:25,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163428864] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:25,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604393020] [2022-07-20 05:52:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:25,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:25,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:25,904 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) [2022-07-20 05:52:25,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 05:52:25,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:25,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 05:52:25,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:25,990 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:52:25,990 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 [2022-07-20 05:52:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-20 05:52:26,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-20 05:52:26,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604393020] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:26,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:26,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2022-07-20 05:52:26,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279960805] [2022-07-20 05:52:26,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:26,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:52:26,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:26,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:52:26,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:52:26,580 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 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) [2022-07-20 05:52:26,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:26,880 INFO L93 Difference]: Finished difference Result 160 states and 169 transitions. [2022-07-20 05:52:26,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:52:26,881 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 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 92 [2022-07-20 05:52:26,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:26,881 INFO L225 Difference]: With dead ends: 160 [2022-07-20 05:52:26,881 INFO L226 Difference]: Without dead ends: 160 [2022-07-20 05:52:26,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-07-20 05:52:26,882 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 224 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:26,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 90 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:26,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-20 05:52:26,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 124. [2022-07-20 05:52:26,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 123 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:26,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 133 transitions. [2022-07-20 05:52:26,884 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 133 transitions. Word has length 92 [2022-07-20 05:52:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:26,884 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 133 transitions. [2022-07-20 05:52:26,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 5.6) internal successors, (112), 21 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) [2022-07-20 05:52:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 133 transitions. [2022-07-20 05:52:26,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-07-20 05:52:26,885 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:26,885 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1] [2022-07-20 05:52:26,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:27,085 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,SelfDestructingSolverStorable22 [2022-07-20 05:52:27,086 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:27,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:27,086 INFO L85 PathProgramCache]: Analyzing trace with hash 129325764, now seen corresponding path program 4 times [2022-07-20 05:52:27,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:27,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948183192] [2022-07-20 05:52:27,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:27,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 470 proven. 378 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-07-20 05:52:27,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:27,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948183192] [2022-07-20 05:52:27,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948183192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:27,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885229485] [2022-07-20 05:52:27,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:52:27,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:27,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:27,237 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) [2022-07-20 05:52:27,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 05:52:27,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:52:27,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:27,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:52:27,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-20 05:52:27,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:27,918 INFO L134 CoverageAnalysis]: Checked inductivity of 977 backedges. 254 proven. 664 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-20 05:52:27,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885229485] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:27,918 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:27,918 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 38 [2022-07-20 05:52:27,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689166516] [2022-07-20 05:52:27,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:27,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 05:52:27,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:27,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 05:52:27,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=1068, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 05:52:27,920 INFO L87 Difference]: Start difference. First operand 124 states and 133 transitions. Second operand has 38 states, 38 states have (on average 5.842105263157895) internal successors, (222), 38 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) [2022-07-20 05:52:29,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:29,263 INFO L93 Difference]: Finished difference Result 371 states and 404 transitions. [2022-07-20 05:52:29,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-20 05:52:29,264 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.842105263157895) internal successors, (222), 38 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 121 [2022-07-20 05:52:29,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:29,265 INFO L225 Difference]: With dead ends: 371 [2022-07-20 05:52:29,265 INFO L226 Difference]: Without dead ends: 371 [2022-07-20 05:52:29,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3498 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2257, Invalid=8045, Unknown=0, NotChecked=0, Total=10302 [2022-07-20 05:52:29,268 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 536 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 536 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:29,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [536 Valid, 109 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:52:29,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-07-20 05:52:29,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 354. [2022-07-20 05:52:29,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.0994318181818181) internal successors, (387), 353 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:29,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 387 transitions. [2022-07-20 05:52:29,272 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 387 transitions. Word has length 121 [2022-07-20 05:52:29,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:29,273 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 387 transitions. [2022-07-20 05:52:29,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.842105263157895) internal successors, (222), 38 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) [2022-07-20 05:52:29,273 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 387 transitions. [2022-07-20 05:52:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-07-20 05:52:29,275 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:29,275 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 44, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-20 05:52:29,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:29,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:29,493 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:29,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:29,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1597142136, now seen corresponding path program 5 times [2022-07-20 05:52:29,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:29,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899822801] [2022-07-20 05:52:29,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:29,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:29,744 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3266 proven. 218 refuted. 0 times theorem prover too weak. 1898 trivial. 0 not checked. [2022-07-20 05:52:29,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:29,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899822801] [2022-07-20 05:52:29,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899822801] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:29,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125799560] [2022-07-20 05:52:29,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:52:29,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:29,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:29,768 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) [2022-07-20 05:52:29,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 05:52:29,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 05:52:29,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:29,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:52:29,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3117 proven. 501 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2022-07-20 05:52:30,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5382 backedges. 3230 proven. 388 refuted. 0 times theorem prover too weak. 1764 trivial. 0 not checked. [2022-07-20 05:52:30,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125799560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:30,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:30,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 38 [2022-07-20 05:52:30,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203792507] [2022-07-20 05:52:30,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:30,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-20 05:52:30,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-20 05:52:30,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2022-07-20 05:52:30,419 INFO L87 Difference]: Start difference. First operand 354 states and 387 transitions. Second operand has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:31,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:31,095 INFO L93 Difference]: Finished difference Result 354 states and 369 transitions. [2022-07-20 05:52:31,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 05:52:31,096 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 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 281 [2022-07-20 05:52:31,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:31,097 INFO L225 Difference]: With dead ends: 354 [2022-07-20 05:52:31,097 INFO L226 Difference]: Without dead ends: 354 [2022-07-20 05:52:31,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 541 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=866, Invalid=3040, Unknown=0, NotChecked=0, Total=3906 [2022-07-20 05:52:31,098 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 151 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:31,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 99 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:52:31,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-07-20 05:52:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-07-20 05:52:31,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.0482954545454546) internal successors, (369), 353 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 369 transitions. [2022-07-20 05:52:31,102 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 369 transitions. Word has length 281 [2022-07-20 05:52:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:31,103 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 369 transitions. [2022-07-20 05:52:31,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.078947368421052) internal successors, (193), 38 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 369 transitions. [2022-07-20 05:52:31,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-07-20 05:52:31,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:31,105 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 48, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-20 05:52:31,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:31,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:31,305 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:31,306 INFO L85 PathProgramCache]: Analyzing trace with hash 763391400, now seen corresponding path program 6 times [2022-07-20 05:52:31,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:31,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858307112] [2022-07-20 05:52:31,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:31,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4200 proven. 311 refuted. 0 times theorem prover too weak. 1821 trivial. 0 not checked. [2022-07-20 05:52:31,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:31,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858307112] [2022-07-20 05:52:31,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858307112] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:31,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338092040] [2022-07-20 05:52:31,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:52:31,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:31,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:31,559 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) [2022-07-20 05:52:31,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 05:52:31,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-07-20 05:52:31,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:31,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-20 05:52:31,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:32,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2022-07-20 05:52:32,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:32,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6332 backedges. 4137 proven. 736 refuted. 0 times theorem prover too weak. 1459 trivial. 0 not checked. [2022-07-20 05:52:32,305 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338092040] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:32,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:32,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 36 [2022-07-20 05:52:32,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140070695] [2022-07-20 05:52:32,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:32,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 05:52:32,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:32,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 05:52:32,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 05:52:32,308 INFO L87 Difference]: Start difference. First operand 354 states and 369 transitions. Second operand has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:33,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:33,460 INFO L93 Difference]: Finished difference Result 354 states and 365 transitions. [2022-07-20 05:52:33,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 05:52:33,461 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 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 301 [2022-07-20 05:52:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:33,462 INFO L225 Difference]: With dead ends: 354 [2022-07-20 05:52:33,462 INFO L226 Difference]: Without dead ends: 354 [2022-07-20 05:52:33,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=899, Invalid=3793, Unknown=0, NotChecked=0, Total=4692 [2022-07-20 05:52:33,463 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 128 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1696 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:33,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 109 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1696 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 05:52:33,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-07-20 05:52:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 354. [2022-07-20 05:52:33,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 352 states have (on average 1.0369318181818181) internal successors, (365), 353 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 365 transitions. [2022-07-20 05:52:33,467 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 365 transitions. Word has length 301 [2022-07-20 05:52:33,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:33,467 INFO L495 AbstractCegarLoop]: Abstraction has 354 states and 365 transitions. [2022-07-20 05:52:33,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.0) internal successors, (216), 36 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:33,467 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 365 transitions. [2022-07-20 05:52:33,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-07-20 05:52:33,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:33,469 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 51, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-20 05:52:33,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-20 05:52:33,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:33,679 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:33,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:33,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1134310783, now seen corresponding path program 7 times [2022-07-20 05:52:33,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:33,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675790976] [2022-07-20 05:52:33,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:33,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4815 proven. 419 refuted. 0 times theorem prover too weak. 1863 trivial. 0 not checked. [2022-07-20 05:52:33,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:33,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675790976] [2022-07-20 05:52:33,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675790976] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:33,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894173479] [2022-07-20 05:52:33,945 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:52:33,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:33,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:33,946 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) [2022-07-20 05:52:33,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 05:52:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:34,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 05:52:34,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2022-07-20 05:52:34,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7097 backedges. 4920 proven. 1132 refuted. 0 times theorem prover too weak. 1045 trivial. 0 not checked. [2022-07-20 05:52:34,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894173479] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:34,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:34,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 41 [2022-07-20 05:52:34,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638067789] [2022-07-20 05:52:34,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:34,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 05:52:34,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:34,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 05:52:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1346, Unknown=0, NotChecked=0, Total=1640 [2022-07-20 05:52:34,798 INFO L87 Difference]: Start difference. First operand 354 states and 365 transitions. Second operand has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:36,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:36,511 INFO L93 Difference]: Finished difference Result 406 states and 414 transitions. [2022-07-20 05:52:36,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-20 05:52:36,511 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 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 316 [2022-07-20 05:52:36,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:36,512 INFO L225 Difference]: With dead ends: 406 [2022-07-20 05:52:36,512 INFO L226 Difference]: Without dead ends: 406 [2022-07-20 05:52:36,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1270, Invalid=5536, Unknown=0, NotChecked=0, Total=6806 [2022-07-20 05:52:36,514 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 136 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 2782 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:36,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 217 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2782 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 05:52:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-07-20 05:52:36,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 396. [2022-07-20 05:52:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 394 states have (on average 1.0253807106598984) internal successors, (404), 395 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 404 transitions. [2022-07-20 05:52:36,519 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 404 transitions. Word has length 316 [2022-07-20 05:52:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:36,519 INFO L495 AbstractCegarLoop]: Abstraction has 396 states and 404 transitions. [2022-07-20 05:52:36,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 404 transitions. [2022-07-20 05:52:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-07-20 05:52:36,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:36,522 INFO L195 NwaCegarLoop]: trace histogram [54, 53, 53, 53, 53, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-20 05:52:36,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:36,736 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,SelfDestructingSolverStorable26 [2022-07-20 05:52:36,736 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:36,737 INFO L85 PathProgramCache]: Analyzing trace with hash -25370281, now seen corresponding path program 8 times [2022-07-20 05:52:36,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:36,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323762436] [2022-07-20 05:52:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:36,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:36,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 4817 proven. 542 refuted. 0 times theorem prover too weak. 2273 trivial. 0 not checked. [2022-07-20 05:52:37,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:37,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323762436] [2022-07-20 05:52:37,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323762436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:37,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781459663] [2022-07-20 05:52:37,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:52:37,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:37,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:37,052 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) [2022-07-20 05:52:37,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 05:52:37,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:52:37,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:37,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 1059 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-20 05:52:37,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 5286 proven. 1646 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-07-20 05:52:37,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7632 backedges. 5286 proven. 1646 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2022-07-20 05:52:37,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781459663] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:37,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:37,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 46 [2022-07-20 05:52:37,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30886003] [2022-07-20 05:52:37,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:37,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 05:52:37,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:37,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 05:52:37,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1708, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 05:52:37,832 INFO L87 Difference]: Start difference. First operand 396 states and 404 transitions. Second operand has 46 states, 46 states have (on average 6.065217391304348) internal successors, (279), 46 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:39,352 INFO L93 Difference]: Finished difference Result 453 states and 459 transitions. [2022-07-20 05:52:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-20 05:52:39,353 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.065217391304348) internal successors, (279), 46 states have internal predecessors, (279), 0 states have call successors, (0), 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 326 [2022-07-20 05:52:39,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:39,354 INFO L225 Difference]: With dead ends: 453 [2022-07-20 05:52:39,354 INFO L226 Difference]: Without dead ends: 453 [2022-07-20 05:52:39,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 629 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1739, Invalid=7767, Unknown=0, NotChecked=0, Total=9506 [2022-07-20 05:52:39,356 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 165 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:39,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 139 Invalid, 2564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 05:52:39,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-07-20 05:52:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 443. [2022-07-20 05:52:39,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 441 states have (on average 1.018140589569161) internal successors, (449), 442 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 449 transitions. [2022-07-20 05:52:39,360 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 449 transitions. Word has length 326 [2022-07-20 05:52:39,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:39,361 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 449 transitions. [2022-07-20 05:52:39,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.065217391304348) internal successors, (279), 46 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:39,361 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 449 transitions. [2022-07-20 05:52:39,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-07-20 05:52:39,362 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:39,362 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 54, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-20 05:52:39,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:39,572 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,SelfDestructingSolverStorable27 [2022-07-20 05:52:39,572 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:39,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1065134024, now seen corresponding path program 9 times [2022-07-20 05:52:39,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:39,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810124851] [2022-07-20 05:52:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:39,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 3828 proven. 705 refuted. 0 times theorem prover too weak. 3374 trivial. 0 not checked. [2022-07-20 05:52:39,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:39,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810124851] [2022-07-20 05:52:39,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810124851] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:39,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978913719] [2022-07-20 05:52:39,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:52:39,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:39,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:39,904 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) [2022-07-20 05:52:39,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 05:52:40,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-20 05:52:40,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:40,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-20 05:52:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 2376 proven. 245 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2022-07-20 05:52:40,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 7907 backedges. 2376 proven. 245 refuted. 0 times theorem prover too weak. 5286 trivial. 0 not checked. [2022-07-20 05:52:40,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978913719] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:40,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:40,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 49 [2022-07-20 05:52:40,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023293696] [2022-07-20 05:52:40,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:40,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-20 05:52:40,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:40,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-20 05:52:40,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=583, Invalid=1769, Unknown=0, NotChecked=0, Total=2352 [2022-07-20 05:52:40,622 INFO L87 Difference]: Start difference. First operand 443 states and 449 transitions. Second operand has 49 states, 49 states have (on average 4.591836734693878) internal successors, (225), 49 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:42,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:42,412 INFO L93 Difference]: Finished difference Result 699 states and 718 transitions. [2022-07-20 05:52:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-20 05:52:42,413 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 4.591836734693878) internal successors, (225), 49 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 331 [2022-07-20 05:52:42,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:42,415 INFO L225 Difference]: With dead ends: 699 [2022-07-20 05:52:42,415 INFO L226 Difference]: Without dead ends: 699 [2022-07-20 05:52:42,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 762 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3611 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3586, Invalid=9754, Unknown=0, NotChecked=0, Total=13340 [2022-07-20 05:52:42,417 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 1277 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1277 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:42,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1277 Valid, 118 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 05:52:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-07-20 05:52:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 502. [2022-07-20 05:52:42,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 500 states have (on average 1.062) internal successors, (531), 501 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:42,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 531 transitions. [2022-07-20 05:52:42,424 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 531 transitions. Word has length 331 [2022-07-20 05:52:42,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:42,424 INFO L495 AbstractCegarLoop]: Abstraction has 502 states and 531 transitions. [2022-07-20 05:52:42,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 4.591836734693878) internal successors, (225), 49 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 531 transitions. [2022-07-20 05:52:42,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-07-20 05:52:42,440 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:42,440 INFO L195 NwaCegarLoop]: trace histogram [57, 57, 56, 56, 56, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-20 05:52:42,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:42,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-20 05:52:42,658 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1489328682, now seen corresponding path program 2 times [2022-07-20 05:52:42,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:42,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201042643] [2022-07-20 05:52:42,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:42,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 5854 proven. 408 refuted. 0 times theorem prover too weak. 2266 trivial. 0 not checked. [2022-07-20 05:52:42,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:42,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201042643] [2022-07-20 05:52:42,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201042643] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:42,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547682410] [2022-07-20 05:52:42,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:52:42,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:42,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:42,955 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) [2022-07-20 05:52:42,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 05:52:43,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-20 05:52:43,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:43,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-20 05:52:43,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:43,083 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:52:43,083 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 [2022-07-20 05:52:43,828 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 10 proven. 2526 refuted. 0 times theorem prover too weak. 5992 trivial. 0 not checked. [2022-07-20 05:52:43,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:44,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8528 backedges. 0 proven. 2536 refuted. 0 times theorem prover too weak. 5992 trivial. 0 not checked. [2022-07-20 05:52:44,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547682410] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:44,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:44,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 4] total 27 [2022-07-20 05:52:44,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276915800] [2022-07-20 05:52:44,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:44,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-20 05:52:44,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:44,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-20 05:52:44,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-07-20 05:52:44,358 INFO L87 Difference]: Start difference. First operand 502 states and 531 transitions. Second operand has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:45,084 INFO L93 Difference]: Finished difference Result 501 states and 517 transitions. [2022-07-20 05:52:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-20 05:52:45,084 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 342 [2022-07-20 05:52:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:45,090 INFO L225 Difference]: With dead ends: 501 [2022-07-20 05:52:45,091 INFO L226 Difference]: Without dead ends: 501 [2022-07-20 05:52:45,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 680 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=984, Invalid=2798, Unknown=0, NotChecked=0, Total=3782 [2022-07-20 05:52:45,092 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 618 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:45,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 42 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:52:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-07-20 05:52:45,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 449. [2022-07-20 05:52:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.0379464285714286) internal successors, (465), 448 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 465 transitions. [2022-07-20 05:52:45,115 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 465 transitions. Word has length 342 [2022-07-20 05:52:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:45,116 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 465 transitions. [2022-07-20 05:52:45,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.666666666666667) internal successors, (153), 27 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 465 transitions. [2022-07-20 05:52:45,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-20 05:52:45,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:45,124 INFO L195 NwaCegarLoop]: trace histogram [71, 70, 70, 70, 70, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1] [2022-07-20 05:52:45,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:45,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:45,341 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:45,342 INFO L85 PathProgramCache]: Analyzing trace with hash -935388728, now seen corresponding path program 10 times [2022-07-20 05:52:45,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:45,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022484901] [2022-07-20 05:52:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:45,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:45,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 6122 proven. 217 refuted. 0 times theorem prover too weak. 6648 trivial. 0 not checked. [2022-07-20 05:52:45,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:45,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022484901] [2022-07-20 05:52:45,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022484901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:45,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960898627] [2022-07-20 05:52:45,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:52:45,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:45,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:45,556 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) [2022-07-20 05:52:45,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 05:52:46,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:52:46,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:46,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:52:46,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 6467 proven. 1800 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2022-07-20 05:52:46,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:46,758 INFO L134 CoverageAnalysis]: Checked inductivity of 12987 backedges. 6467 proven. 1800 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2022-07-20 05:52:46,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960898627] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:46,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:46,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 37 [2022-07-20 05:52:46,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293982794] [2022-07-20 05:52:46,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:46,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 05:52:46,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:46,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 05:52:46,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1080, Unknown=0, NotChecked=0, Total=1332 [2022-07-20 05:52:46,760 INFO L87 Difference]: Start difference. First operand 449 states and 465 transitions. Second operand has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:47,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:47,605 INFO L93 Difference]: Finished difference Result 449 states and 464 transitions. [2022-07-20 05:52:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-20 05:52:47,606 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 0 states have call successors, (0), 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 411 [2022-07-20 05:52:47,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:47,607 INFO L225 Difference]: With dead ends: 449 [2022-07-20 05:52:47,607 INFO L226 Difference]: Without dead ends: 449 [2022-07-20 05:52:47,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 802 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1098, Invalid=4304, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 05:52:47,608 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 552 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 552 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:47,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [552 Valid, 100 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:52:47,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-07-20 05:52:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 449. [2022-07-20 05:52:47,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 1.0357142857142858) internal successors, (464), 448 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 464 transitions. [2022-07-20 05:52:47,612 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 464 transitions. Word has length 411 [2022-07-20 05:52:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:47,612 INFO L495 AbstractCegarLoop]: Abstraction has 449 states and 464 transitions. [2022-07-20 05:52:47,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.972972972972973) internal successors, (221), 37 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 464 transitions. [2022-07-20 05:52:47,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-07-20 05:52:47,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:47,625 INFO L195 NwaCegarLoop]: trace histogram [77, 76, 76, 76, 76, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1] [2022-07-20 05:52:47,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:47,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:47,835 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:47,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:47,836 INFO L85 PathProgramCache]: Analyzing trace with hash -205352877, now seen corresponding path program 11 times [2022-07-20 05:52:47,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:47,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005718120] [2022-07-20 05:52:47,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:47,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:52:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 7790 proven. 1983 refuted. 0 times theorem prover too weak. 5583 trivial. 0 not checked. [2022-07-20 05:52:48,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:52:48,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005718120] [2022-07-20 05:52:48,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005718120] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:52:48,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419802490] [2022-07-20 05:52:48,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:52:48,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:52:48,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:52:48,223 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) [2022-07-20 05:52:48,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 05:52:49,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2022-07-20 05:52:49,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:52:49,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-20 05:52:49,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:52:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 2150 proven. 12344 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2022-07-20 05:52:50,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:52:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15356 backedges. 2107 proven. 12387 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2022-07-20 05:52:51,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419802490] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:52:51,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:52:51,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 39, 39] total 87 [2022-07-20 05:52:51,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108946684] [2022-07-20 05:52:51,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:52:51,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-20 05:52:51,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:52:51,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-20 05:52:51,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1517, Invalid=5965, Unknown=0, NotChecked=0, Total=7482 [2022-07-20 05:52:51,206 INFO L87 Difference]: Start difference. First operand 449 states and 464 transitions. Second operand has 87 states, 87 states have (on average 5.839080459770115) internal successors, (508), 87 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:52:59,269 INFO L93 Difference]: Finished difference Result 1408 states and 1506 transitions. [2022-07-20 05:52:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 308 states. [2022-07-20 05:52:59,269 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 5.839080459770115) internal successors, (508), 87 states have internal predecessors, (508), 0 states have call successors, (0), 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 448 [2022-07-20 05:52:59,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:52:59,272 INFO L225 Difference]: With dead ends: 1408 [2022-07-20 05:52:59,272 INFO L226 Difference]: Without dead ends: 1408 [2022-07-20 05:52:59,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1211 GetRequests, 835 SyntacticMatches, 2 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56915 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=26001, Invalid=114999, Unknown=0, NotChecked=0, Total=141000 [2022-07-20 05:52:59,279 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 4119 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 2736 mSolverCounterSat, 1653 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4119 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 4389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1653 IncrementalHoareTripleChecker+Valid, 2736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:52:59,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4119 Valid, 263 Invalid, 4389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1653 Valid, 2736 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-20 05:52:59,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2022-07-20 05:52:59,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 1384. [2022-07-20 05:52:59,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.0715835140997831) internal successors, (1482), 1383 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:59,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1482 transitions. [2022-07-20 05:52:59,291 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1482 transitions. Word has length 448 [2022-07-20 05:52:59,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:52:59,292 INFO L495 AbstractCegarLoop]: Abstraction has 1384 states and 1482 transitions. [2022-07-20 05:52:59,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 5.839080459770115) internal successors, (508), 87 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:52:59,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1482 transitions. [2022-07-20 05:52:59,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1229 [2022-07-20 05:52:59,299 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:52:59,300 INFO L195 NwaCegarLoop]: trace histogram [219, 218, 218, 218, 218, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1] [2022-07-20 05:52:59,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 05:52:59,520 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,SelfDestructingSolverStorable31 [2022-07-20 05:52:59,521 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:52:59,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:52:59,521 INFO L85 PathProgramCache]: Analyzing trace with hash -2000272005, now seen corresponding path program 12 times [2022-07-20 05:52:59,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:52:59,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595473207] [2022-07-20 05:52:59,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:52:59,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:52:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 124078 backedges. 63448 proven. 1001 refuted. 0 times theorem prover too weak. 59629 trivial. 0 not checked. [2022-07-20 05:53:00,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:53:00,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595473207] [2022-07-20 05:53:00,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595473207] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:00,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830302537] [2022-07-20 05:53:00,241 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:53:00,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:00,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:53:00,243 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) [2022-07-20 05:53:00,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 05:53:01,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-07-20 05:53:01,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:53:01,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1457 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 05:53:01,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 124078 backedges. 34924 proven. 2265 refuted. 0 times theorem prover too weak. 86889 trivial. 0 not checked. [2022-07-20 05:53:01,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 124078 backedges. 34839 proven. 2350 refuted. 0 times theorem prover too weak. 86889 trivial. 0 not checked. [2022-07-20 05:53:02,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830302537] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:53:02,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:53:02,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 23, 23] total 72 [2022-07-20 05:53:02,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779242163] [2022-07-20 05:53:02,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:02,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-20 05:53:02,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:53:02,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-20 05:53:02,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=955, Invalid=4157, Unknown=0, NotChecked=0, Total=5112 [2022-07-20 05:53:02,496 INFO L87 Difference]: Start difference. First operand 1384 states and 1482 transitions. Second operand has 72 states, 72 states have (on average 4.638888888888889) internal successors, (334), 72 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:09,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:09,786 INFO L93 Difference]: Finished difference Result 3029 states and 3235 transitions. [2022-07-20 05:53:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-07-20 05:53:09,787 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 4.638888888888889) internal successors, (334), 72 states have internal predecessors, (334), 0 states have call successors, (0), 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 1228 [2022-07-20 05:53:09,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:09,793 INFO L225 Difference]: With dead ends: 3029 [2022-07-20 05:53:09,793 INFO L226 Difference]: Without dead ends: 3029 [2022-07-20 05:53:09,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2705 GetRequests, 2413 SyntacticMatches, 0 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29457 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=14871, Invalid=71271, Unknown=0, NotChecked=0, Total=86142 [2022-07-20 05:53:09,797 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3804 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 2064 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3804 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 3061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 2064 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:09,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3804 Valid, 259 Invalid, 3061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 2064 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-20 05:53:09,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3029 states. [2022-07-20 05:53:09,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3029 to 1891. [2022-07-20 05:53:09,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1891 states, 1890 states have (on average 1.0682539682539682) internal successors, (2019), 1890 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 2019 transitions. [2022-07-20 05:53:09,816 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 2019 transitions. Word has length 1228 [2022-07-20 05:53:09,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:09,816 INFO L495 AbstractCegarLoop]: Abstraction has 1891 states and 2019 transitions. [2022-07-20 05:53:09,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 4.638888888888889) internal successors, (334), 72 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 2019 transitions. [2022-07-20 05:53:09,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1411 [2022-07-20 05:53:09,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:09,826 INFO L195 NwaCegarLoop]: trace histogram [254, 253, 253, 253, 253, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1] [2022-07-20 05:53:09,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-20 05:53:10,039 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,SelfDestructingSolverStorable32 [2022-07-20 05:53:10,040 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:53:10,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:10,040 INFO L85 PathProgramCache]: Analyzing trace with hash 594718143, now seen corresponding path program 13 times [2022-07-20 05:53:10,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:53:10,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683046311] [2022-07-20 05:53:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:10,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:53:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:11,158 INFO L134 CoverageAnalysis]: Checked inductivity of 166326 backedges. 86574 proven. 1298 refuted. 0 times theorem prover too weak. 78454 trivial. 0 not checked. [2022-07-20 05:53:11,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:53:11,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683046311] [2022-07-20 05:53:11,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683046311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:11,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87187928] [2022-07-20 05:53:11,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:53:11,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:11,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:53:11,161 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) [2022-07-20 05:53:11,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 05:53:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:11,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 4255 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-20 05:53:11,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 166326 backedges. 77320 proven. 19602 refuted. 0 times theorem prover too weak. 69404 trivial. 0 not checked. [2022-07-20 05:53:12,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:13,300 INFO L134 CoverageAnalysis]: Checked inductivity of 166326 backedges. 77320 proven. 19602 refuted. 0 times theorem prover too weak. 69404 trivial. 0 not checked. [2022-07-20 05:53:13,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87187928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:53:13,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:53:13,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28, 28] total 70 [2022-07-20 05:53:13,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160080577] [2022-07-20 05:53:13,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:13,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-07-20 05:53:13,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:53:13,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-07-20 05:53:13,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=4065, Unknown=0, NotChecked=0, Total=4830 [2022-07-20 05:53:13,305 INFO L87 Difference]: Start difference. First operand 1891 states and 2019 transitions. Second operand has 70 states, 70 states have (on average 6.1) internal successors, (427), 70 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:15,610 INFO L93 Difference]: Finished difference Result 1965 states and 2092 transitions. [2022-07-20 05:53:15,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-07-20 05:53:15,616 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 6.1) internal successors, (427), 70 states have internal predecessors, (427), 0 states have call successors, (0), 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 1410 [2022-07-20 05:53:15,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:15,621 INFO L225 Difference]: With dead ends: 1965 [2022-07-20 05:53:15,621 INFO L226 Difference]: Without dead ends: 1965 [2022-07-20 05:53:15,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2966 GetRequests, 2782 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10275 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5823, Invalid=28217, Unknown=0, NotChecked=0, Total=34040 [2022-07-20 05:53:15,623 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1871 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1871 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:15,623 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1871 Valid, 237 Invalid, 2554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 05:53:15,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-07-20 05:53:15,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1953. [2022-07-20 05:53:15,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 1.0655737704918034) internal successors, (2080), 1952 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:15,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 2080 transitions. [2022-07-20 05:53:15,642 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 2080 transitions. Word has length 1410 [2022-07-20 05:53:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:15,642 INFO L495 AbstractCegarLoop]: Abstraction has 1953 states and 2080 transitions. [2022-07-20 05:53:15,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 6.1) internal successors, (427), 70 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 2080 transitions. [2022-07-20 05:53:15,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1483 [2022-07-20 05:53:15,658 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:15,658 INFO L195 NwaCegarLoop]: trace histogram [267, 266, 266, 266, 266, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1] [2022-07-20 05:53:15,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:15,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:15,880 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:53:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:15,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1654195611, now seen corresponding path program 14 times [2022-07-20 05:53:15,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:53:15,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625525264] [2022-07-20 05:53:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:15,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:53:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:17,001 INFO L134 CoverageAnalysis]: Checked inductivity of 183855 backedges. 102036 proven. 2964 refuted. 0 times theorem prover too weak. 78855 trivial. 0 not checked. [2022-07-20 05:53:17,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:53:17,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625525264] [2022-07-20 05:53:17,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625525264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:17,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289149649] [2022-07-20 05:53:17,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:53:17,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:17,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:53:17,006 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) [2022-07-20 05:53:17,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 05:53:17,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:53:17,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:53:17,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 4470 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 05:53:17,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 183855 backedges. 88629 proven. 26239 refuted. 0 times theorem prover too weak. 68987 trivial. 0 not checked. [2022-07-20 05:53:18,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 183855 backedges. 88629 proven. 26239 refuted. 0 times theorem prover too weak. 68987 trivial. 0 not checked. [2022-07-20 05:53:19,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289149649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:53:19,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:53:19,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 30, 30] total 74 [2022-07-20 05:53:19,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647622603] [2022-07-20 05:53:19,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:19,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-20 05:53:19,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:53:19,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-20 05:53:19,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=859, Invalid=4543, Unknown=0, NotChecked=0, Total=5402 [2022-07-20 05:53:19,424 INFO L87 Difference]: Start difference. First operand 1953 states and 2080 transitions. Second operand has 74 states, 74 states have (on average 6.175675675675675) internal successors, (457), 74 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:22,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:22,725 INFO L93 Difference]: Finished difference Result 2048 states and 2177 transitions. [2022-07-20 05:53:22,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-07-20 05:53:22,725 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 6.175675675675675) internal successors, (457), 74 states have internal predecessors, (457), 0 states have call successors, (0), 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 1482 [2022-07-20 05:53:22,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:22,730 INFO L225 Difference]: With dead ends: 2048 [2022-07-20 05:53:22,730 INFO L226 Difference]: Without dead ends: 2048 [2022-07-20 05:53:22,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3130 GetRequests, 2925 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13303 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=6833, Invalid=35397, Unknown=0, NotChecked=0, Total=42230 [2022-07-20 05:53:22,733 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1964 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2251 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1964 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 2251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:22,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1964 Valid, 202 Invalid, 2887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 2251 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 05:53:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2022-07-20 05:53:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 2030. [2022-07-20 05:53:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2030 states, 2029 states have (on average 1.0640709709216363) internal successors, (2159), 2029 states have internal predecessors, (2159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:22,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2030 states to 2030 states and 2159 transitions. [2022-07-20 05:53:22,751 INFO L78 Accepts]: Start accepts. Automaton has 2030 states and 2159 transitions. Word has length 1482 [2022-07-20 05:53:22,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:22,751 INFO L495 AbstractCegarLoop]: Abstraction has 2030 states and 2159 transitions. [2022-07-20 05:53:22,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 6.175675675675675) internal successors, (457), 74 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2030 states and 2159 transitions. [2022-07-20 05:53:22,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1555 [2022-07-20 05:53:22,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:22,763 INFO L195 NwaCegarLoop]: trace histogram [280, 279, 279, 279, 279, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1] [2022-07-20 05:53:22,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:22,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:22,983 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:53:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:22,984 INFO L85 PathProgramCache]: Analyzing trace with hash 91939191, now seen corresponding path program 15 times [2022-07-20 05:53:22,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:53:22,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66131035] [2022-07-20 05:53:22,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:22,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:53:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 202262 backedges. 108381 proven. 2852 refuted. 0 times theorem prover too weak. 91029 trivial. 0 not checked. [2022-07-20 05:53:23,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:53:23,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66131035] [2022-07-20 05:53:23,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66131035] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:23,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376989861] [2022-07-20 05:53:23,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:53:23,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:23,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:53:23,972 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) [2022-07-20 05:53:23,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 05:53:24,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-07-20 05:53:24,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:53:24,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-20 05:53:24,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 202262 backedges. 29290 proven. 1199 refuted. 0 times theorem prover too weak. 171773 trivial. 0 not checked. [2022-07-20 05:53:25,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:25,898 INFO L134 CoverageAnalysis]: Checked inductivity of 202262 backedges. 29290 proven. 1199 refuted. 0 times theorem prover too weak. 171773 trivial. 0 not checked. [2022-07-20 05:53:25,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376989861] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:53:25,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:53:25,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 25, 25] total 68 [2022-07-20 05:53:25,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771753596] [2022-07-20 05:53:25,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:25,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-20 05:53:25,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:53:25,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-20 05:53:25,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=849, Invalid=3707, Unknown=0, NotChecked=0, Total=4556 [2022-07-20 05:53:25,901 INFO L87 Difference]: Start difference. First operand 2030 states and 2159 transitions. Second operand has 68 states, 68 states have (on average 4.970588235294118) internal successors, (338), 68 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:30,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:30,226 INFO L93 Difference]: Finished difference Result 2506 states and 2629 transitions. [2022-07-20 05:53:30,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-07-20 05:53:30,227 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 4.970588235294118) internal successors, (338), 68 states have internal predecessors, (338), 0 states have call successors, (0), 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 1554 [2022-07-20 05:53:30,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:30,231 INFO L225 Difference]: With dead ends: 2506 [2022-07-20 05:53:30,231 INFO L226 Difference]: Without dead ends: 2506 [2022-07-20 05:53:30,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3259 GetRequests, 3073 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9806 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6644, Invalid=28138, Unknown=0, NotChecked=0, Total=34782 [2022-07-20 05:53:30,233 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1742 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 2849 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1742 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 2849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:30,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1742 Valid, 400 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 2849 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-20 05:53:30,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2506 states. [2022-07-20 05:53:30,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2506 to 2031. [2022-07-20 05:53:30,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 1.0453201970443349) internal successors, (2122), 2030 states have internal predecessors, (2122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:30,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 2122 transitions. [2022-07-20 05:53:30,289 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 2122 transitions. Word has length 1554 [2022-07-20 05:53:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:30,289 INFO L495 AbstractCegarLoop]: Abstraction has 2031 states and 2122 transitions. [2022-07-20 05:53:30,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 4.970588235294118) internal successors, (338), 68 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 2122 transitions. [2022-07-20 05:53:30,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1610 [2022-07-20 05:53:30,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:30,306 INFO L195 NwaCegarLoop]: trace histogram [291, 290, 290, 290, 290, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1] [2022-07-20 05:53:30,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:30,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:30,519 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:53:30,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:30,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1123683568, now seen corresponding path program 16 times [2022-07-20 05:53:30,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:53:30,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213292889] [2022-07-20 05:53:30,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:30,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:53:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:53:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 218146 backedges. 125582 proven. 1823 refuted. 0 times theorem prover too weak. 90741 trivial. 0 not checked. [2022-07-20 05:53:31,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:53:31,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213292889] [2022-07-20 05:53:31,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213292889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:53:31,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827041526] [2022-07-20 05:53:31,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:53:31,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:53:31,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:53:31,594 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) [2022-07-20 05:53:31,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 05:53:44,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:53:44,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:53:44,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 4839 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-20 05:53:44,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:53:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 218146 backedges. 179733 proven. 16653 refuted. 0 times theorem prover too weak. 21760 trivial. 0 not checked. [2022-07-20 05:53:45,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:53:47,387 INFO L134 CoverageAnalysis]: Checked inductivity of 218146 backedges. 179733 proven. 16653 refuted. 0 times theorem prover too weak. 21760 trivial. 0 not checked. [2022-07-20 05:53:47,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827041526] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:53:47,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:53:47,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 39, 39] total 92 [2022-07-20 05:53:47,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480176537] [2022-07-20 05:53:47,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:53:47,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-20 05:53:47,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:53:47,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-20 05:53:47,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=7046, Unknown=0, NotChecked=0, Total=8372 [2022-07-20 05:53:47,399 INFO L87 Difference]: Start difference. First operand 2031 states and 2122 transitions. Second operand has 92 states, 92 states have (on average 6.771739130434782) internal successors, (623), 92 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:59,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:53:59,180 INFO L93 Difference]: Finished difference Result 1740 states and 1768 transitions. [2022-07-20 05:53:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 269 states. [2022-07-20 05:53:59,181 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 6.771739130434782) internal successors, (623), 92 states have internal predecessors, (623), 0 states have call successors, (0), 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 1609 [2022-07-20 05:53:59,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:53:59,184 INFO L225 Difference]: With dead ends: 1740 [2022-07-20 05:53:59,184 INFO L226 Difference]: Without dead ends: 1740 [2022-07-20 05:53:59,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3499 GetRequests, 3163 SyntacticMatches, 0 SemanticMatches, 336 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29424 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=21348, Invalid=92558, Unknown=0, NotChecked=0, Total=113906 [2022-07-20 05:53:59,192 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 271 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 13172 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 13230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 13172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:53:59,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 548 Invalid, 13230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 13172 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-20 05:53:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-07-20 05:53:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1740. [2022-07-20 05:53:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1739 states have (on average 1.0166762507188039) internal successors, (1768), 1739 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:59,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 1768 transitions. [2022-07-20 05:53:59,205 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 1768 transitions. Word has length 1609 [2022-07-20 05:53:59,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:53:59,206 INFO L495 AbstractCegarLoop]: Abstraction has 1740 states and 1768 transitions. [2022-07-20 05:53:59,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 6.771739130434782) internal successors, (623), 92 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:53:59,206 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 1768 transitions. [2022-07-20 05:53:59,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1720 [2022-07-20 05:53:59,218 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:53:59,219 INFO L195 NwaCegarLoop]: trace histogram [313, 312, 312, 312, 312, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1] [2022-07-20 05:53:59,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-20 05:53:59,439 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,SelfDestructingSolverStorable36 [2022-07-20 05:53:59,439 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:53:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:53:59,440 INFO L85 PathProgramCache]: Analyzing trace with hash 869955008, now seen corresponding path program 17 times [2022-07-20 05:53:59,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:53:59,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765374910] [2022-07-20 05:53:59,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:53:59,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:53:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:54:00,807 INFO L134 CoverageAnalysis]: Checked inductivity of 251729 backedges. 149520 proven. 2597 refuted. 0 times theorem prover too weak. 99612 trivial. 0 not checked. [2022-07-20 05:54:00,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:54:00,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765374910] [2022-07-20 05:54:00,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765374910] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:54:00,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361842740] [2022-07-20 05:54:00,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:54:00,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:54:00,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:54:00,809 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) [2022-07-20 05:54:00,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 05:54:08,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2022-07-20 05:54:08,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:54:08,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 4483 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 05:54:08,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:54:09,768 INFO L134 CoverageAnalysis]: Checked inductivity of 251729 backedges. 188591 proven. 19062 refuted. 0 times theorem prover too weak. 44076 trivial. 0 not checked. [2022-07-20 05:54:09,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:54:11,535 INFO L134 CoverageAnalysis]: Checked inductivity of 251729 backedges. 191946 proven. 15707 refuted. 0 times theorem prover too weak. 44076 trivial. 0 not checked. [2022-07-20 05:54:11,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361842740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:54:11,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:54:11,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 105 [2022-07-20 05:54:11,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366833202] [2022-07-20 05:54:11,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:54:11,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-07-20 05:54:11,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:54:11,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-07-20 05:54:11,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1774, Invalid=9146, Unknown=0, NotChecked=0, Total=10920 [2022-07-20 05:54:11,560 INFO L87 Difference]: Start difference. First operand 1740 states and 1768 transitions. Second operand has 105 states, 105 states have (on average 5.761904761904762) internal successors, (605), 105 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:21,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:54:21,910 INFO L93 Difference]: Finished difference Result 1740 states and 1766 transitions. [2022-07-20 05:54:21,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2022-07-20 05:54:21,910 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 5.761904761904762) internal successors, (605), 105 states have internal predecessors, (605), 0 states have call successors, (0), 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 1719 [2022-07-20 05:54:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:54:21,914 INFO L225 Difference]: With dead ends: 1740 [2022-07-20 05:54:21,914 INFO L226 Difference]: Without dead ends: 1740 [2022-07-20 05:54:21,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3692 GetRequests, 3376 SyntacticMatches, 0 SemanticMatches, 316 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25774 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=18548, Invalid=82258, Unknown=0, NotChecked=0, Total=100806 [2022-07-20 05:54:21,917 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 347 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 16592 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 16659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 16592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:54:21,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 541 Invalid, 16659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 16592 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-20 05:54:21,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1740 states. [2022-07-20 05:54:21,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1740 to 1740. [2022-07-20 05:54:21,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1739 states have (on average 1.0155261644623346) internal successors, (1766), 1739 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 1766 transitions. [2022-07-20 05:54:21,955 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 1766 transitions. Word has length 1719 [2022-07-20 05:54:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:54:21,955 INFO L495 AbstractCegarLoop]: Abstraction has 1740 states and 1766 transitions. [2022-07-20 05:54:21,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 5.761904761904762) internal successors, (605), 105 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 1766 transitions. [2022-07-20 05:54:21,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1730 [2022-07-20 05:54:21,980 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:54:21,981 INFO L195 NwaCegarLoop]: trace histogram [315, 314, 314, 314, 314, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1] [2022-07-20 05:54:22,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-20 05:54:22,203 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,SelfDestructingSolverStorable37 [2022-07-20 05:54:22,203 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:54:22,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:54:22,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1470670504, now seen corresponding path program 18 times [2022-07-20 05:54:22,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:54:22,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515180691] [2022-07-20 05:54:22,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:54:22,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:54:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:54:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 254902 backedges. 158784 proven. 6179 refuted. 0 times theorem prover too weak. 89939 trivial. 0 not checked. [2022-07-20 05:54:23,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:54:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515180691] [2022-07-20 05:54:23,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515180691] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:54:23,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092582894] [2022-07-20 05:54:23,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:54:23,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:54:23,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:54:23,594 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) [2022-07-20 05:54:23,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 05:54:37,934 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2022-07-20 05:54:37,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:54:37,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 4936 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 05:54:37,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:54:39,239 INFO L134 CoverageAnalysis]: Checked inductivity of 254902 backedges. 122160 proven. 32380 refuted. 0 times theorem prover too weak. 100362 trivial. 0 not checked. [2022-07-20 05:54:39,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:54:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 254902 backedges. 122035 proven. 32505 refuted. 0 times theorem prover too weak. 100362 trivial. 0 not checked. [2022-07-20 05:54:40,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092582894] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:54:40,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:54:40,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 30, 30] total 103 [2022-07-20 05:54:40,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400235818] [2022-07-20 05:54:40,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:54:40,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-07-20 05:54:40,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:54:40,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-07-20 05:54:40,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1719, Invalid=8787, Unknown=0, NotChecked=0, Total=10506 [2022-07-20 05:54:40,545 INFO L87 Difference]: Start difference. First operand 1740 states and 1766 transitions. Second operand has 103 states, 103 states have (on average 5.174757281553398) internal successors, (533), 103 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:56,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:54:56,748 INFO L93 Difference]: Finished difference Result 3600 states and 3757 transitions. [2022-07-20 05:54:56,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 412 states. [2022-07-20 05:54:56,749 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 5.174757281553398) internal successors, (533), 103 states have internal predecessors, (533), 0 states have call successors, (0), 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 1729 [2022-07-20 05:54:56,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:54:56,755 INFO L225 Difference]: With dead ends: 3600 [2022-07-20 05:54:56,755 INFO L226 Difference]: Without dead ends: 3600 [2022-07-20 05:54:56,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3910 GetRequests, 3401 SyntacticMatches, 0 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93944 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=33897, Invalid=226713, Unknown=0, NotChecked=0, Total=260610 [2022-07-20 05:54:56,766 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 12562 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 5111 mSolverCounterSat, 2939 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12562 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 8050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2939 IncrementalHoareTripleChecker+Valid, 5111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:54:56,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12562 Valid, 358 Invalid, 8050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2939 Valid, 5111 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-20 05:54:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2022-07-20 05:54:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 2420. [2022-07-20 05:54:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2420 states, 2419 states have (on average 1.0227366680446466) internal successors, (2474), 2419 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2420 states to 2420 states and 2474 transitions. [2022-07-20 05:54:56,783 INFO L78 Accepts]: Start accepts. Automaton has 2420 states and 2474 transitions. Word has length 1729 [2022-07-20 05:54:56,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:54:56,784 INFO L495 AbstractCegarLoop]: Abstraction has 2420 states and 2474 transitions. [2022-07-20 05:54:56,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 5.174757281553398) internal successors, (533), 103 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:54:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 2420 states and 2474 transitions. [2022-07-20 05:54:56,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2415 [2022-07-20 05:54:56,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:54:56,806 INFO L195 NwaCegarLoop]: trace histogram [445, 444, 444, 444, 444, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1] [2022-07-20 05:54:56,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-20 05:54:57,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-20 05:54:57,019 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:54:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:54:57,020 INFO L85 PathProgramCache]: Analyzing trace with hash -2111951525, now seen corresponding path program 19 times [2022-07-20 05:54:57,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:54:57,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697050384] [2022-07-20 05:54:57,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:54:57,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:54:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:54:59,210 INFO L134 CoverageAnalysis]: Checked inductivity of 507117 backedges. 295413 proven. 3506 refuted. 0 times theorem prover too weak. 208198 trivial. 0 not checked. [2022-07-20 05:54:59,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:54:59,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697050384] [2022-07-20 05:54:59,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697050384] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:54:59,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792454691] [2022-07-20 05:54:59,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:54:59,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:54:59,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:54:59,212 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) [2022-07-20 05:54:59,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 05:55:00,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:00,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 7160 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-20 05:55:00,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 507117 backedges. 378965 proven. 25891 refuted. 0 times theorem prover too weak. 102261 trivial. 0 not checked. [2022-07-20 05:55:02,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 507117 backedges. 378965 proven. 25891 refuted. 0 times theorem prover too weak. 102261 trivial. 0 not checked. [2022-07-20 05:55:04,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792454691] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:55:04,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:55:04,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 45, 45] total 111 [2022-07-20 05:55:04,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516315324] [2022-07-20 05:55:04,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:55:04,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-07-20 05:55:04,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:55:04,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-07-20 05:55:04,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1883, Invalid=10327, Unknown=0, NotChecked=0, Total=12210 [2022-07-20 05:55:04,561 INFO L87 Difference]: Start difference. First operand 2420 states and 2474 transitions. Second operand has 111 states, 111 states have (on average 6.27027027027027) internal successors, (696), 111 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:55:20,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:20,040 INFO L93 Difference]: Finished difference Result 2438 states and 2486 transitions. [2022-07-20 05:55:20,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 297 states. [2022-07-20 05:55:20,041 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 6.27027027027027) internal successors, (696), 111 states have internal predecessors, (696), 0 states have call successors, (0), 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 2414 [2022-07-20 05:55:20,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:20,046 INFO L225 Difference]: With dead ends: 2438 [2022-07-20 05:55:20,046 INFO L226 Difference]: Without dead ends: 2438 [2022-07-20 05:55:20,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5148 GetRequests, 4766 SyntacticMatches, 0 SemanticMatches, 382 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38461 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=24944, Invalid=122128, Unknown=0, NotChecked=0, Total=147072 [2022-07-20 05:55:20,051 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 342 mSDsluCounter, 562 mSDsCounter, 0 mSdLazyCounter, 19501 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 19560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 19501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:20,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 606 Invalid, 19560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 19501 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-07-20 05:55:20,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2022-07-20 05:55:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2430. [2022-07-20 05:55:20,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2430 states, 2429 states have (on average 1.0201729106628241) internal successors, (2478), 2429 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:55:20,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2430 states to 2430 states and 2478 transitions. [2022-07-20 05:55:20,068 INFO L78 Accepts]: Start accepts. Automaton has 2430 states and 2478 transitions. Word has length 2414 [2022-07-20 05:55:20,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:20,068 INFO L495 AbstractCegarLoop]: Abstraction has 2430 states and 2478 transitions. [2022-07-20 05:55:20,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 6.27027027027027) internal successors, (696), 111 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:55:20,069 INFO L276 IsEmpty]: Start isEmpty. Operand 2430 states and 2478 transitions. [2022-07-20 05:55:20,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2430 [2022-07-20 05:55:20,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:20,091 INFO L195 NwaCegarLoop]: trace histogram [448, 447, 447, 447, 447, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1] [2022-07-20 05:55:20,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-20 05:55:20,307 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,SelfDestructingSolverStorable39 [2022-07-20 05:55:20,307 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:55:20,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:20,308 INFO L85 PathProgramCache]: Analyzing trace with hash -43800644, now seen corresponding path program 20 times [2022-07-20 05:55:20,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:55:20,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476255226] [2022-07-20 05:55:20,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:20,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:55:20,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 513879 backedges. 296709 proven. 3839 refuted. 0 times theorem prover too weak. 213331 trivial. 0 not checked. [2022-07-20 05:55:22,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:55:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476255226] [2022-07-20 05:55:22,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476255226] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:55:22,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895298414] [2022-07-20 05:55:22,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:55:22,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:55:22,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:55:22,311 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) [2022-07-20 05:55:22,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-20 05:55:23,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:55:23,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:55:23,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 7202 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-20 05:55:23,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 513879 backedges. 399434 proven. 29632 refuted. 0 times theorem prover too weak. 84813 trivial. 0 not checked. [2022-07-20 05:55:26,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 513879 backedges. 399434 proven. 29632 refuted. 0 times theorem prover too weak. 84813 trivial. 0 not checked. [2022-07-20 05:55:27,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895298414] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:55:27,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:55:27,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 47, 47] total 116 [2022-07-20 05:55:27,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463196710] [2022-07-20 05:55:27,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:55:27,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-20 05:55:27,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:55:27,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-20 05:55:27,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2049, Invalid=11291, Unknown=0, NotChecked=0, Total=13340 [2022-07-20 05:55:27,615 INFO L87 Difference]: Start difference. First operand 2430 states and 2478 transitions. Second operand has 116 states, 116 states have (on average 6.275862068965517) internal successors, (728), 116 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:55:43,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:55:43,735 INFO L93 Difference]: Finished difference Result 2448 states and 2491 transitions. [2022-07-20 05:55:43,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 322 states. [2022-07-20 05:55:43,736 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 6.275862068965517) internal successors, (728), 116 states have internal predecessors, (728), 0 states have call successors, (0), 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 2429 [2022-07-20 05:55:43,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:55:43,741 INFO L225 Difference]: With dead ends: 2448 [2022-07-20 05:55:43,741 INFO L226 Difference]: Without dead ends: 2448 [2022-07-20 05:55:43,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5204 GetRequests, 4793 SyntacticMatches, 0 SemanticMatches, 411 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44762 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=28815, Invalid=141341, Unknown=0, NotChecked=0, Total=170156 [2022-07-20 05:55:43,750 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 339 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 20962 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 21032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 20962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-20 05:55:43,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 614 Invalid, 21032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 20962 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-07-20 05:55:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2448 states. [2022-07-20 05:55:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2448 to 2440. [2022-07-20 05:55:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2440 states, 2439 states have (on average 1.018040180401804) internal successors, (2483), 2439 states have internal predecessors, (2483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:55:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2440 states to 2440 states and 2483 transitions. [2022-07-20 05:55:43,766 INFO L78 Accepts]: Start accepts. Automaton has 2440 states and 2483 transitions. Word has length 2429 [2022-07-20 05:55:43,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:55:43,767 INFO L495 AbstractCegarLoop]: Abstraction has 2440 states and 2483 transitions. [2022-07-20 05:55:43,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 6.275862068965517) internal successors, (728), 116 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:55:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2440 states and 2483 transitions. [2022-07-20 05:55:43,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2440 [2022-07-20 05:55:43,789 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:55:43,790 INFO L195 NwaCegarLoop]: trace histogram [450, 449, 449, 449, 449, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1] [2022-07-20 05:55:43,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-20 05:55:44,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:55:44,015 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:55:44,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:55:44,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2085675180, now seen corresponding path program 21 times [2022-07-20 05:55:44,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:55:44,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34141634] [2022-07-20 05:55:44,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:55:44,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:55:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:55:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 518412 backedges. 291711 proven. 4187 refuted. 0 times theorem prover too weak. 222514 trivial. 0 not checked. [2022-07-20 05:55:46,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:55:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34141634] [2022-07-20 05:55:46,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34141634] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:55:46,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932042440] [2022-07-20 05:55:46,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:55:46,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:55:46,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:55:46,097 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) [2022-07-20 05:55:46,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-20 05:55:50,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2022-07-20 05:55:50,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:55:50,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 3553 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 05:55:50,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:55:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 518412 backedges. 245925 proven. 65347 refuted. 0 times theorem prover too weak. 207140 trivial. 0 not checked. [2022-07-20 05:55:52,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:55:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 518412 backedges. 245800 proven. 65472 refuted. 0 times theorem prover too weak. 207140 trivial. 0 not checked. [2022-07-20 05:55:55,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932042440] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:55:55,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 05:55:55,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 35, 35] total 118 [2022-07-20 05:55:55,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380265296] [2022-07-20 05:55:55,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 05:55:55,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-07-20 05:55:55,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:55:55,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-07-20 05:55:55,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2238, Invalid=11568, Unknown=0, NotChecked=0, Total=13806 [2022-07-20 05:55:55,323 INFO L87 Difference]: Start difference. First operand 2440 states and 2483 transitions. Second operand has 118 states, 118 states have (on average 5.296610169491525) internal successors, (625), 118 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:56:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:56:13,879 INFO L93 Difference]: Finished difference Result 7322 states and 7569 transitions. [2022-07-20 05:56:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 398 states. [2022-07-20 05:56:13,880 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 5.296610169491525) internal successors, (625), 118 states have internal predecessors, (625), 0 states have call successors, (0), 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 2439 [2022-07-20 05:56:13,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:56:13,892 INFO L225 Difference]: With dead ends: 7322 [2022-07-20 05:56:13,893 INFO L226 Difference]: Without dead ends: 7322 [2022-07-20 05:56:13,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5323 GetRequests, 4813 SyntacticMatches, 0 SemanticMatches, 510 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90459 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=32937, Invalid=228695, Unknown=0, NotChecked=0, Total=261632 [2022-07-20 05:56:13,902 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 10986 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 5403 mSolverCounterSat, 2317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10986 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 7720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2317 IncrementalHoareTripleChecker+Valid, 5403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:56:13,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10986 Valid, 529 Invalid, 7720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2317 Valid, 5403 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 05:56:13,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7322 states. [2022-07-20 05:56:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7322 to 2973. [2022-07-20 05:56:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2973 states, 2972 states have (on average 1.015814266487214) internal successors, (3019), 2972 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:56:13,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2973 states to 2973 states and 3019 transitions. [2022-07-20 05:56:13,932 INFO L78 Accepts]: Start accepts. Automaton has 2973 states and 3019 transitions. Word has length 2439 [2022-07-20 05:56:13,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:56:13,933 INFO L495 AbstractCegarLoop]: Abstraction has 2973 states and 3019 transitions. [2022-07-20 05:56:13,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 5.296610169491525) internal successors, (625), 118 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:56:13,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2973 states and 3019 transitions. [2022-07-20 05:56:13,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2851 [2022-07-20 05:56:13,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:56:13,963 INFO L195 NwaCegarLoop]: trace histogram [528, 527, 527, 527, 527, 31, 30, 30, 30, 30, 30, 30, 1, 1, 1] [2022-07-20 05:56:13,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-20 05:56:14,172 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,SelfDestructingSolverStorable41 [2022-07-20 05:56:14,173 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX === [ULTIMATE.startErr0ASSERT_VIOLATIONARRAY_INDEX, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-07-20 05:56:14,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:56:14,173 INFO L85 PathProgramCache]: Analyzing trace with hash 992296967, now seen corresponding path program 22 times [2022-07-20 05:56:14,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:56:14,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727494040] [2022-07-20 05:56:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:56:14,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:56:14,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:56:16,458 INFO L134 CoverageAnalysis]: Checked inductivity of 712974 backedges. 410694 proven. 3753 refuted. 0 times theorem prover too weak. 298527 trivial. 0 not checked. [2022-07-20 05:56:16,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:56:16,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727494040] [2022-07-20 05:56:16,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727494040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:56:16,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244887429] [2022-07-20 05:56:16,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:56:16,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:56:16,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:56:16,460 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) [2022-07-20 05:56:16,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process