./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 05:45:04,291 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 05:45:04,292 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 05:45:04,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 05:45:04,318 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 05:45:04,320 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 05:45:04,322 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 05:45:04,324 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 05:45:04,326 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 05:45:04,329 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 05:45:04,330 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 05:45:04,331 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 05:45:04,332 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 05:45:04,334 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 05:45:04,335 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 05:45:04,336 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 05:45:04,337 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 05:45:04,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 05:45:04,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 05:45:04,341 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 05:45:04,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 05:45:04,348 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 05:45:04,349 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 05:45:04,350 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 05:45:04,353 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 05:45:04,356 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 05:45:04,356 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 05:45:04,357 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 05:45:04,358 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 05:45:04,358 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 05:45:04,359 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 05:45:04,359 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 05:45:04,360 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 05:45:04,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 05:45:04,362 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 05:45:04,362 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 05:45:04,362 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 05:45:04,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 05:45:04,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 05:45:04,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 05:45:04,364 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 05:45:04,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-28 05:45:04,388 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 05:45:04,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 05:45:04,390 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 05:45:04,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 05:45:04,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 05:45:04,391 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 05:45:04,392 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 05:45:04,392 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 05:45:04,392 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 05:45:04,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 05:45:04,393 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 05:45:04,393 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-28 05:45:04,393 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 05:45:04,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 05:45:04,394 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 05:45:04,394 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-28 05:45:04,394 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-28 05:45:04,394 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-28 05:45:04,394 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 05:45:04,394 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 05:45:04,394 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 05:45:04,395 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 05:45:04,395 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 05:45:04,395 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 05:45:04,395 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 05:45:04,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:45:04,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 05:45:04,396 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 05:45:04,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 05:45:04,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 05:45:04,396 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 [2021-12-28 05:45:04,667 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 05:45:04,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 05:45:04,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 05:45:04,690 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 05:45:04,691 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 05:45:04,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2021-12-28 05:45:04,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ea11d5be/3ffe86246edd495cb5c1bfb060467213/FLAG521c1666a [2021-12-28 05:45:05,133 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 05:45:05,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2021-12-28 05:45:05,147 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ea11d5be/3ffe86246edd495cb5c1bfb060467213/FLAG521c1666a [2021-12-28 05:45:05,158 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ea11d5be/3ffe86246edd495cb5c1bfb060467213 [2021-12-28 05:45:05,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 05:45:05,161 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 05:45:05,162 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 05:45:05,162 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 05:45:05,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 05:45:05,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:45:05" (1/1) ... [2021-12-28 05:45:05,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20855d60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05, skipping insertion in model container [2021-12-28 05:45:05,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 05:45:05" (1/1) ... [2021-12-28 05:45:05,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 05:45:05,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 05:45:05,391 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:45:05,396 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 05:45:05,420 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 05:45:05,435 INFO L208 MainTranslator]: Completed translation [2021-12-28 05:45:05,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05 WrapperNode [2021-12-28 05:45:05,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 05:45:05,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 05:45:05,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 05:45:05,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 05:45:05,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05" (1/1) ... [2021-12-28 05:45:05,468 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05" (1/1) ... [2021-12-28 05:45:05,483 INFO L137 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2021-12-28 05:45:05,483 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 05:45:05,484 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 05:45:05,484 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 05:45:05,484 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 05:45:05,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05" (1/1) ... [2021-12-28 05:45:05,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05" (1/1) ... [2021-12-28 05:45:05,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05" (1/1) ... [2021-12-28 05:45:05,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05" (1/1) ... [2021-12-28 05:45:05,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05" (1/1) ... [2021-12-28 05:45:05,497 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05" (1/1) ... [2021-12-28 05:45:05,498 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05" (1/1) ... [2021-12-28 05:45:05,499 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 05:45:05,500 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 05:45:05,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 05:45:05,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 05:45:05,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05" (1/1) ... [2021-12-28 05:45:05,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 05:45:05,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:05,533 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) [2021-12-28 05:45:05,551 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 [2021-12-28 05:45:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-28 05:45:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-28 05:45:05,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-28 05:45:05,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-28 05:45:05,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 05:45:05,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 05:45:05,631 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 05:45:05,632 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 05:45:05,750 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 05:45:05,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 05:45:05,755 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-28 05:45:05,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:45:05 BoogieIcfgContainer [2021-12-28 05:45:05,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 05:45:05,757 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 05:45:05,757 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 05:45:05,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 05:45:05,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 05:45:05" (1/3) ... [2021-12-28 05:45:05,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@375b47c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:45:05, skipping insertion in model container [2021-12-28 05:45:05,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 05:45:05" (2/3) ... [2021-12-28 05:45:05,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@375b47c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 05:45:05, skipping insertion in model container [2021-12-28 05:45:05,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 05:45:05" (3/3) ... [2021-12-28 05:45:05,765 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcpy-alloca-2.i [2021-12-28 05:45:05,770 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 05:45:05,770 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2021-12-28 05:45:05,798 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 05:45:05,803 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 05:45:05,804 INFO L340 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2021-12-28 05:45:05,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 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) [2021-12-28 05:45:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:45:05,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:05,847 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:45:05,848 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:05,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:05,852 INFO L85 PathProgramCache]: Analyzing trace with hash 889510840, now seen corresponding path program 1 times [2021-12-28 05:45:05,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:05,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810470476] [2021-12-28 05:45:05,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:05,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:05,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:06,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:06,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810470476] [2021-12-28 05:45:06,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810470476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:06,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:06,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:45:06,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589084143] [2021-12-28 05:45:06,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:06,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:06,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:06,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:06,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:06,054 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 28 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) Second operand has 4 states, 4 states have (on average 1.5) 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) [2021-12-28 05:45:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:06,111 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-12-28 05:45:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:06,114 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 [2021-12-28 05:45:06,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:06,119 INFO L225 Difference]: With dead ends: 34 [2021-12-28 05:45:06,119 INFO L226 Difference]: Without dead ends: 30 [2021-12-28 05:45:06,121 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:45:06,125 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 56 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:06,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 35 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:06,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-28 05:45:06,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-12-28 05:45:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-28 05:45:06,165 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2021-12-28 05:45:06,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:06,166 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-28 05:45:06,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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) [2021-12-28 05:45:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-28 05:45:06,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-28 05:45:06,167 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:06,167 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-28 05:45:06,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 05:45:06,168 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:06,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:06,170 INFO L85 PathProgramCache]: Analyzing trace with hash 889512762, now seen corresponding path program 1 times [2021-12-28 05:45:06,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:06,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607418382] [2021-12-28 05:45:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:06,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:06,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:06,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:06,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:06,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607418382] [2021-12-28 05:45:06,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607418382] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:06,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:06,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:45:06,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050420607] [2021-12-28 05:45:06,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:06,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:45:06,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:06,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:45:06,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:45:06,215 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 3 states, 2 states have (on average 3.0) 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) [2021-12-28 05:45:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:06,244 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-12-28 05:45:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:45:06,245 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) 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 [2021-12-28 05:45:06,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:06,246 INFO L225 Difference]: With dead ends: 29 [2021-12-28 05:45:06,247 INFO L226 Difference]: Without dead ends: 28 [2021-12-28 05:45:06,247 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:45:06,249 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:06,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 43 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:06,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-28 05:45:06,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-12-28 05:45:06,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-28 05:45:06,255 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 6 [2021-12-28 05:45:06,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:06,256 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-28 05:45:06,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) 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) [2021-12-28 05:45:06,257 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-28 05:45:06,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:45:06,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:06,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:06,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 05:45:06,258 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:06,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:06,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033015, now seen corresponding path program 1 times [2021-12-28 05:45:06,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:06,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797971217] [2021-12-28 05:45:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:06,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:06,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:06,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797971217] [2021-12-28 05:45:06,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797971217] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:06,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:06,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 05:45:06,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832392702] [2021-12-28 05:45:06,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:06,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 05:45:06,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:06,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 05:45:06,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 05:45:06,324 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:06,344 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-12-28 05:45:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 05:45:06,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-28 05:45:06,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:06,345 INFO L225 Difference]: With dead ends: 25 [2021-12-28 05:45:06,346 INFO L226 Difference]: Without dead ends: 25 [2021-12-28 05:45:06,346 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:45:06,348 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:06,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 22 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:06,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-28 05:45:06,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-12-28 05:45:06,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 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) [2021-12-28 05:45:06,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-12-28 05:45:06,354 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 7 [2021-12-28 05:45:06,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:06,355 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-12-28 05:45:06,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,355 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-12-28 05:45:06,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:45:06,356 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:06,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:06,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 05:45:06,357 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:06,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:06,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033016, now seen corresponding path program 1 times [2021-12-28 05:45:06,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:06,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959360086] [2021-12-28 05:45:06,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:06,358 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:06,426 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:06,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959360086] [2021-12-28 05:45:06,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959360086] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:06,427 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:06,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:45:06,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566749396] [2021-12-28 05:45:06,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:06,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:06,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:06,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:06,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:06,428 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:06,450 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-12-28 05:45:06,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:06,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-28 05:45:06,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:06,451 INFO L225 Difference]: With dead ends: 24 [2021-12-28 05:45:06,453 INFO L226 Difference]: Without dead ends: 24 [2021-12-28 05:45:06,453 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:45:06,454 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:06,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:06,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-28 05:45:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-28 05:45:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.5) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-12-28 05:45:06,463 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 7 [2021-12-28 05:45:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:06,463 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-12-28 05:45:06,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-12-28 05:45:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:45:06,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:06,464 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:06,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 05:45:06,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:06,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:06,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1805033069, now seen corresponding path program 1 times [2021-12-28 05:45:06,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:06,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892846003] [2021-12-28 05:45:06,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:06,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:06,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:06,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:06,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892846003] [2021-12-28 05:45:06,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892846003] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:06,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:06,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:45:06,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962649753] [2021-12-28 05:45:06,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:06,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:06,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:06,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:06,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:06,510 INFO L87 Difference]: Start difference. First operand 24 states and 27 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) [2021-12-28 05:45:06,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:06,528 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2021-12-28 05:45:06,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:06,528 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 [2021-12-28 05:45:06,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:06,529 INFO L225 Difference]: With dead ends: 40 [2021-12-28 05:45:06,529 INFO L226 Difference]: Without dead ends: 40 [2021-12-28 05:45:06,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:06,530 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:06,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 44 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:06,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-28 05:45:06,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2021-12-28 05:45:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.45) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-12-28 05:45:06,536 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 7 [2021-12-28 05:45:06,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:06,536 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-12-28 05:45:06,537 INFO L471 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) [2021-12-28 05:45:06,537 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-12-28 05:45:06,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-28 05:45:06,538 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:06,539 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:06,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 05:45:06,542 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:06,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:06,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1805092651, now seen corresponding path program 1 times [2021-12-28 05:45:06,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:06,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615182101] [2021-12-28 05:45:06,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:06,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:06,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:06,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615182101] [2021-12-28 05:45:06,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615182101] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:06,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:06,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:45:06,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319360097] [2021-12-28 05:45:06,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:06,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:06,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:06,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:06,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:06,608 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:06,671 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-12-28 05:45:06,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:06,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-28 05:45:06,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:06,672 INFO L225 Difference]: With dead ends: 44 [2021-12-28 05:45:06,672 INFO L226 Difference]: Without dead ends: 44 [2021-12-28 05:45:06,672 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:45:06,673 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:06,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:45:06,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-28 05:45:06,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 28. [2021-12-28 05:45:06,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-28 05:45:06,676 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 7 [2021-12-28 05:45:06,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:06,676 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-28 05:45:06,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-28 05:45:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 05:45:06,677 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:06,677 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:06,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 05:45:06,677 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:06,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:06,677 INFO L85 PathProgramCache]: Analyzing trace with hash -530059845, now seen corresponding path program 1 times [2021-12-28 05:45:06,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:06,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191954546] [2021-12-28 05:45:06,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:06,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:06,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:06,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191954546] [2021-12-28 05:45:06,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191954546] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:06,712 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:06,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:45:06,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850739058] [2021-12-28 05:45:06,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:06,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:06,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:06,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:06,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:06,714 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:06,740 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-28 05:45:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:06,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-28 05:45:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:06,741 INFO L225 Difference]: With dead ends: 27 [2021-12-28 05:45:06,741 INFO L226 Difference]: Without dead ends: 27 [2021-12-28 05:45:06,741 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:45:06,742 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:06,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:06,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-28 05:45:06,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-28 05:45:06,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-28 05:45:06,744 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 9 [2021-12-28 05:45:06,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:06,744 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-28 05:45:06,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,745 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-28 05:45:06,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 05:45:06,745 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:06,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:06,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 05:45:06,745 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:06,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:06,746 INFO L85 PathProgramCache]: Analyzing trace with hash -530059844, now seen corresponding path program 1 times [2021-12-28 05:45:06,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:06,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312667202] [2021-12-28 05:45:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:06,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:06,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:06,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:06,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312667202] [2021-12-28 05:45:06,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312667202] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:06,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:06,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 05:45:06,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264547093] [2021-12-28 05:45:06,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:06,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 05:45:06,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:06,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 05:45:06,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:45:06,800 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:06,841 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2021-12-28 05:45:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:45:06,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-12-28 05:45:06,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:06,842 INFO L225 Difference]: With dead ends: 37 [2021-12-28 05:45:06,842 INFO L226 Difference]: Without dead ends: 37 [2021-12-28 05:45:06,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 05:45:06,843 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 92 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:06,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 36 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:06,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-28 05:45:06,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2021-12-28 05:45:06,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-28 05:45:06,845 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 9 [2021-12-28 05:45:06,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:06,846 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-28 05:45:06,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.8) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,846 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-28 05:45:06,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 05:45:06,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:06,846 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:06,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 05:45:06,847 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:06,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:06,847 INFO L85 PathProgramCache]: Analyzing trace with hash 748014006, now seen corresponding path program 1 times [2021-12-28 05:45:06,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:06,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108271427] [2021-12-28 05:45:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:06,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:06,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:06,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:06,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108271427] [2021-12-28 05:45:06,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108271427] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:06,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:06,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:45:06,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219062149] [2021-12-28 05:45:06,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:06,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:45:06,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:06,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:45:06,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:06,921 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:06,946 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-12-28 05:45:06,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:06,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-28 05:45:06,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:06,947 INFO L225 Difference]: With dead ends: 27 [2021-12-28 05:45:06,947 INFO L226 Difference]: Without dead ends: 27 [2021-12-28 05:45:06,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-28 05:45:06,948 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 34 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:06,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:06,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-28 05:45:06,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-28 05:45:06,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-12-28 05:45:06,950 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 10 [2021-12-28 05:45:06,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:06,950 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-12-28 05:45:06,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:06,951 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-12-28 05:45:06,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-28 05:45:06,951 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:06,951 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:06,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 05:45:06,951 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:06,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:06,952 INFO L85 PathProgramCache]: Analyzing trace with hash 748014007, now seen corresponding path program 1 times [2021-12-28 05:45:06,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:06,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151694119] [2021-12-28 05:45:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:06,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:06,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:06,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151694119] [2021-12-28 05:45:07,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151694119] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:07,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:07,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:45:07,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315065833] [2021-12-28 05:45:07,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:07,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 05:45:07,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:07,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 05:45:07,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 05:45:07,001 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:07,029 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-12-28 05:45:07,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 05:45:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-28 05:45:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:07,030 INFO L225 Difference]: With dead ends: 34 [2021-12-28 05:45:07,030 INFO L226 Difference]: Without dead ends: 34 [2021-12-28 05:45:07,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:45:07,030 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:07,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 36 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-28 05:45:07,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-12-28 05:45:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:07,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-28 05:45:07,033 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 10 [2021-12-28 05:45:07,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:07,033 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-28 05:45:07,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:07,034 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-28 05:45:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:45:07,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:07,034 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:07,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 05:45:07,034 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:07,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:07,035 INFO L85 PathProgramCache]: Analyzing trace with hash 952918382, now seen corresponding path program 1 times [2021-12-28 05:45:07,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:07,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609723360] [2021-12-28 05:45:07,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:07,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:07,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-28 05:45:07,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:07,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609723360] [2021-12-28 05:45:07,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609723360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:07,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:07,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 05:45:07,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372681426] [2021-12-28 05:45:07,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:07,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:07,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:07,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:07,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:07,077 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:07,095 INFO L93 Difference]: Finished difference Result 47 states and 52 transitions. [2021-12-28 05:45:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:07,096 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-28 05:45:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:07,097 INFO L225 Difference]: With dead ends: 47 [2021-12-28 05:45:07,097 INFO L226 Difference]: Without dead ends: 47 [2021-12-28 05:45:07,097 INFO L932 BasicCegarLoop]: 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 [2021-12-28 05:45:07,097 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 28 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:07,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 58 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:07,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-28 05:45:07,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 29. [2021-12-28 05:45:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.36) internal successors, (34), 28 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2021-12-28 05:45:07,100 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 11 [2021-12-28 05:45:07,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:07,100 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2021-12-28 05:45:07,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:07,100 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2021-12-28 05:45:07,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-28 05:45:07,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:07,101 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:07,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 05:45:07,101 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:07,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:07,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1632976752, now seen corresponding path program 1 times [2021-12-28 05:45:07,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:07,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536017529] [2021-12-28 05:45:07,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:07,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:07,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:07,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536017529] [2021-12-28 05:45:07,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536017529] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:07,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412423441] [2021-12-28 05:45:07,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:07,156 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:07,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:07,157 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) [2021-12-28 05:45:07,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 05:45:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:07,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-28 05:45:07,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:07,361 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:45:07,362 INFO L387 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 [2021-12-28 05:45:07,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:07,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:07,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412423441] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:07,584 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:07,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-28 05:45:07,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311422228] [2021-12-28 05:45:07,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:07,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 05:45:07,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:07,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 05:45:07,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-28 05:45:07,586 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:07,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:07,687 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2021-12-28 05:45:07,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:45:07,687 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-28 05:45:07,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:07,688 INFO L225 Difference]: With dead ends: 59 [2021-12-28 05:45:07,688 INFO L226 Difference]: Without dead ends: 59 [2021-12-28 05:45:07,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-28 05:45:07,689 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 86 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:07,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 86 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:45:07,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-28 05:45:07,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 26. [2021-12-28 05:45:07,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:07,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-12-28 05:45:07,691 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 11 [2021-12-28 05:45:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:07,692 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-12-28 05:45:07,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:07,692 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-12-28 05:45:07,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:45:07,692 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:07,692 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:07,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:07,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-28 05:45:07,907 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:07,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:07,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1794944983, now seen corresponding path program 1 times [2021-12-28 05:45:07,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:07,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058571367] [2021-12-28 05:45:07,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:07,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:08,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:08,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:08,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058571367] [2021-12-28 05:45:08,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058571367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:08,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:08,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 05:45:08,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984138796] [2021-12-28 05:45:08,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:08,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:45:08,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:08,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:45:08,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:45:08,006 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:08,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:08,059 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2021-12-28 05:45:08,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:45:08,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 05:45:08,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:08,060 INFO L225 Difference]: With dead ends: 37 [2021-12-28 05:45:08,060 INFO L226 Difference]: Without dead ends: 37 [2021-12-28 05:45:08,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-28 05:45:08,061 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:08,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 81 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:08,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-28 05:45:08,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-12-28 05:45:08,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) 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) [2021-12-28 05:45:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-12-28 05:45:08,063 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 13 [2021-12-28 05:45:08,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:08,063 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-12-28 05:45:08,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:08,063 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-12-28 05:45:08,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:45:08,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:08,064 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:08,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 05:45:08,064 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:08,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1401917973, now seen corresponding path program 1 times [2021-12-28 05:45:08,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:08,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976913533] [2021-12-28 05:45:08,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:08,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:08,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:08,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976913533] [2021-12-28 05:45:08,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976913533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:08,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:08,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 05:45:08,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121688215] [2021-12-28 05:45:08,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:08,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:45:08,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:08,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:45:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:45:08,135 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:08,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:08,201 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-12-28 05:45:08,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:45:08,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 05:45:08,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:08,202 INFO L225 Difference]: With dead ends: 49 [2021-12-28 05:45:08,202 INFO L226 Difference]: Without dead ends: 49 [2021-12-28 05:45:08,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:45:08,203 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:08,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 99 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:08,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-28 05:45:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2021-12-28 05:45:08,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 28 states have (on average 1.25) 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) [2021-12-28 05:45:08,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-12-28 05:45:08,213 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 13 [2021-12-28 05:45:08,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:08,214 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-12-28 05:45:08,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:08,214 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-12-28 05:45:08,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-28 05:45:08,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:08,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:08,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 05:45:08,216 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:08,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:08,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2102982551, now seen corresponding path program 1 times [2021-12-28 05:45:08,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:08,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425197894] [2021-12-28 05:45:08,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:08,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:08,316 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:08,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425197894] [2021-12-28 05:45:08,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425197894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:08,316 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:08,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-28 05:45:08,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758038865] [2021-12-28 05:45:08,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:08,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 05:45:08,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:08,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 05:45:08,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-28 05:45:08,319 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:08,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:08,461 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-12-28 05:45:08,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 05:45:08,462 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-28 05:45:08,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:08,462 INFO L225 Difference]: With dead ends: 44 [2021-12-28 05:45:08,462 INFO L226 Difference]: Without dead ends: 44 [2021-12-28 05:45:08,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-12-28 05:45:08,463 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:08,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 85 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:08,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-12-28 05:45:08,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2021-12-28 05:45:08,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 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) [2021-12-28 05:45:08,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-12-28 05:45:08,464 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 13 [2021-12-28 05:45:08,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:08,464 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-12-28 05:45:08,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:08,464 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-12-28 05:45:08,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-28 05:45:08,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:08,465 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:08,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 05:45:08,465 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:08,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:08,465 INFO L85 PathProgramCache]: Analyzing trace with hash -191335553, now seen corresponding path program 1 times [2021-12-28 05:45:08,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:08,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870887305] [2021-12-28 05:45:08,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:08,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:08,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:08,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870887305] [2021-12-28 05:45:08,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870887305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 05:45:08,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 05:45:08,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 05:45:08,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749080185] [2021-12-28 05:45:08,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 05:45:08,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-28 05:45:08,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-28 05:45:08,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:08,522 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:08,531 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2021-12-28 05:45:08,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-28 05:45:08,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-12-28 05:45:08,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:08,533 INFO L225 Difference]: With dead ends: 31 [2021-12-28 05:45:08,534 INFO L226 Difference]: Without dead ends: 20 [2021-12-28 05:45:08,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-28 05:45:08,534 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:08,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 32 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:08,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-28 05:45:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-28 05:45:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 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) [2021-12-28 05:45:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-12-28 05:45:08,536 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2021-12-28 05:45:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:08,536 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-12-28 05:45:08,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:08,537 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-12-28 05:45:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-28 05:45:08,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:08,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:08,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 05:45:08,537 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:08,538 INFO L85 PathProgramCache]: Analyzing trace with hash 70337178, now seen corresponding path program 1 times [2021-12-28 05:45:08,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:08,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362642924] [2021-12-28 05:45:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:08,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:08,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:08,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:08,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362642924] [2021-12-28 05:45:08,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362642924] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:08,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107187097] [2021-12-28 05:45:08,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:08,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:08,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:08,639 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) [2021-12-28 05:45:08,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-28 05:45:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:08,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-28 05:45:08,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:08,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:08,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:08,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 05:45:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:08,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107187097] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:08,871 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:08,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2021-12-28 05:45:08,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107879507] [2021-12-28 05:45:08,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:08,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-28 05:45:08,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:08,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-28 05:45:08,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-12-28 05:45:08,872 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 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) [2021-12-28 05:45:08,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:08,960 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-12-28 05:45:08,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:45:08,960 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 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) Word has length 17 [2021-12-28 05:45:08,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:08,961 INFO L225 Difference]: With dead ends: 30 [2021-12-28 05:45:08,961 INFO L226 Difference]: Without dead ends: 30 [2021-12-28 05:45:08,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:45:08,962 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 111 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:08,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 45 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:08,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-28 05:45:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2021-12-28 05:45:08,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:08,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-12-28 05:45:08,963 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 17 [2021-12-28 05:45:08,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:08,963 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-12-28 05:45:08,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.25) internal successors, (36), 17 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) [2021-12-28 05:45:08,964 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-12-28 05:45:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-28 05:45:08,964 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:08,964 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:08,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:09,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-28 05:45:09,180 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:09,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:09,181 INFO L85 PathProgramCache]: Analyzing trace with hash -2114514791, now seen corresponding path program 1 times [2021-12-28 05:45:09,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:09,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601033543] [2021-12-28 05:45:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:09,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:09,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:09,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:09,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:09,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601033543] [2021-12-28 05:45:09,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601033543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:09,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387402400] [2021-12-28 05:45:09,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:09,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:09,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:09,244 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) [2021-12-28 05:45:09,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-28 05:45:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:09,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-28 05:45:09,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:09,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:45:09,339 INFO L387 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 [2021-12-28 05:45:09,350 INFO L387 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 [2021-12-28 05:45:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:09,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:09,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:09,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387402400] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:09,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:09,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2021-12-28 05:45:09,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101119681] [2021-12-28 05:45:09,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:09,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-28 05:45:09,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:09,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-28 05:45:09,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-12-28 05:45:09,567 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:09,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:09,692 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-12-28 05:45:09,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 05:45:09,693 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-28 05:45:09,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:09,693 INFO L225 Difference]: With dead ends: 29 [2021-12-28 05:45:09,693 INFO L226 Difference]: Without dead ends: 29 [2021-12-28 05:45:09,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:45:09,694 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:09,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 48 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 05:45:09,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-28 05:45:09,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2021-12-28 05:45:09,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 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) [2021-12-28 05:45:09,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-12-28 05:45:09,695 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2021-12-28 05:45:09,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:09,695 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-12-28 05:45:09,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:09,695 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-12-28 05:45:09,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-28 05:45:09,696 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:09,696 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:09,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:09,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-28 05:45:09,896 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:09,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:09,897 INFO L85 PathProgramCache]: Analyzing trace with hash 775185845, now seen corresponding path program 2 times [2021-12-28 05:45:09,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:09,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734469010] [2021-12-28 05:45:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:09,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:10,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:10,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734469010] [2021-12-28 05:45:10,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734469010] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:10,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210408603] [2021-12-28 05:45:10,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:45:10,083 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:10,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:10,088 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) [2021-12-28 05:45:10,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-28 05:45:10,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:45:10,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:10,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-28 05:45:10,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:10,156 INFO L387 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 [2021-12-28 05:45:10,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:45:10,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:45:10,474 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:10,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-28 05:45:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:10,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:10,808 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_~from#1.offset_16| Int) (v_ArrVal_188 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_~from#1.offset_16|) (not (<= 0 |v_ULTIMATE.start_cstrcpy_~from#1.offset_16|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_188) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_16| 1)) 0) (<= (+ |v_ULTIMATE.start_cstrcpy_~from#1.offset_16| 3) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)))) is different from false [2021-12-28 05:45:10,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:10,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:45:10,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:10,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:45:10,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:45:10,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-28 05:45:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:10,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210408603] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:10,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:10,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2021-12-28 05:45:10,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154394994] [2021-12-28 05:45:10,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:10,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-28 05:45:10,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-28 05:45:10,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=768, Unknown=2, NotChecked=56, Total=930 [2021-12-28 05:45:10,971 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:11,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:11,668 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-12-28 05:45:11,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 05:45:11,669 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-28 05:45:11,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:11,669 INFO L225 Difference]: With dead ends: 47 [2021-12-28 05:45:11,669 INFO L226 Difference]: Without dead ends: 38 [2021-12-28 05:45:11,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=203, Invalid=1439, Unknown=2, NotChecked=78, Total=1722 [2021-12-28 05:45:11,670 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:11,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 114 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 203 Invalid, 0 Unknown, 67 Unchecked, 0.1s Time] [2021-12-28 05:45:11,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-28 05:45:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-12-28 05:45:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-12-28 05:45:11,671 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 21 [2021-12-28 05:45:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:11,671 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-12-28 05:45:11,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-12-28 05:45:11,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-28 05:45:11,683 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:11,683 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:11,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:11,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:11,891 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:11,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:11,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1518290629, now seen corresponding path program 2 times [2021-12-28 05:45:11,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:11,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705918119] [2021-12-28 05:45:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:11,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:11,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:11,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705918119] [2021-12-28 05:45:11,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705918119] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:11,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309898666] [2021-12-28 05:45:11,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:45:11,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:11,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:11,987 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) [2021-12-28 05:45:11,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-28 05:45:12,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:45:12,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:12,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 30 conjunts are in the unsatisfiable core [2021-12-28 05:45:12,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:12,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:45:12,058 INFO L387 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 [2021-12-28 05:45:12,061 INFO L387 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 [2021-12-28 05:45:12,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:12,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:12,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309898666] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:12,419 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:12,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2021-12-28 05:45:12,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372665258] [2021-12-28 05:45:12,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:12,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-28 05:45:12,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:12,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-28 05:45:12,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-12-28 05:45:12,420 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 21 states, 20 states have (on average 3.45) internal successors, (69), 21 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) [2021-12-28 05:45:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:12,610 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-12-28 05:45:12,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 05:45:12,610 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.45) internal successors, (69), 21 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) Word has length 26 [2021-12-28 05:45:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:12,611 INFO L225 Difference]: With dead ends: 34 [2021-12-28 05:45:12,611 INFO L226 Difference]: Without dead ends: 34 [2021-12-28 05:45:12,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-12-28 05:45:12,611 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 86 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:12,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 50 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:45:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-28 05:45:12,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-12-28 05:45:12,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-12-28 05:45:12,613 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2021-12-28 05:45:12,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:12,613 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-12-28 05:45:12,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.45) internal successors, (69), 21 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) [2021-12-28 05:45:12,614 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-12-28 05:45:12,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-28 05:45:12,614 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:12,614 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:12,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:12,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:12,832 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:12,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1095540269, now seen corresponding path program 3 times [2021-12-28 05:45:12,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:12,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128117402] [2021-12-28 05:45:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:12,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:12,978 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:12,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128117402] [2021-12-28 05:45:12,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128117402] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:12,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160712413] [2021-12-28 05:45:12,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:45:12,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:12,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:12,980 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) [2021-12-28 05:45:12,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-28 05:45:13,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-28 05:45:13,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:13,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-28 05:45:13,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:13,059 INFO L387 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 [2021-12-28 05:45:13,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:45:13,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:13,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:13,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-28 05:45:13,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:13,445 INFO L387 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 [2021-12-28 05:45:13,451 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:13,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:13,481 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_261) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-28 05:45:13,489 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_261) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-28 05:45:13,510 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_261 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_261) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 2 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-28 05:45:13,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:13,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:45:13,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:13,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:45:13,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:45:13,697 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 9 not checked. [2021-12-28 05:45:13,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160712413] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:13,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:13,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 31 [2021-12-28 05:45:13,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400027049] [2021-12-28 05:45:13,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:13,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-12-28 05:45:13,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:13,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-12-28 05:45:13,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=668, Unknown=3, NotChecked=162, Total=930 [2021-12-28 05:45:13,699 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 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) [2021-12-28 05:45:13,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:13,907 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-12-28 05:45:13,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-28 05:45:13,908 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 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 29 [2021-12-28 05:45:13,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:13,908 INFO L225 Difference]: With dead ends: 52 [2021-12-28 05:45:13,908 INFO L226 Difference]: Without dead ends: 39 [2021-12-28 05:45:13,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=872, Unknown=3, NotChecked=186, Total=1190 [2021-12-28 05:45:13,909 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:13,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 166 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 0 Unknown, 72 Unchecked, 0.1s Time] [2021-12-28 05:45:13,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-28 05:45:13,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2021-12-28 05:45:13,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 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) [2021-12-28 05:45:13,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-12-28 05:45:13,910 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 29 [2021-12-28 05:45:13,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:13,911 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-12-28 05:45:13,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 31 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) [2021-12-28 05:45:13,911 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-12-28 05:45:13,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-28 05:45:13,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:13,911 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:13,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:14,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:14,116 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:14,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:14,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1267943126, now seen corresponding path program 4 times [2021-12-28 05:45:14,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:14,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620645153] [2021-12-28 05:45:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:14,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:14,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:14,238 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:14,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620645153] [2021-12-28 05:45:14,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620645153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:14,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496355166] [2021-12-28 05:45:14,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 05:45:14,239 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:14,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:14,240 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) [2021-12-28 05:45:14,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-28 05:45:14,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 05:45:14,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:14,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 58 conjunts are in the unsatisfiable core [2021-12-28 05:45:14,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:14,341 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:45:14,342 INFO L387 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 [2021-12-28 05:45:14,350 INFO L387 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 [2021-12-28 05:45:14,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-28 05:45:14,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:45:14,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:45:14,722 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:14,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-28 05:45:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:14,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:15,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:15,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:45:15,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:15,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:45:15,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:45:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:15,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496355166] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:15,509 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:15,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 14] total 35 [2021-12-28 05:45:15,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650085717] [2021-12-28 05:45:15,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:15,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-28 05:45:15,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:15,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-28 05:45:15,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1098, Unknown=1, NotChecked=0, Total=1260 [2021-12-28 05:45:15,511 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 36 states, 35 states have (on average 2.6) internal successors, (91), 36 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:15,900 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) (.cse0 (select |c_#length| |c_ULTIMATE.start_cstrcpy_~from#1.base|))) (and (<= 2 |c_ULTIMATE.start_cstrcpy_~from#1.offset|) (or (forall ((v_ArrVal_307 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_307) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) (and (<= (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3) .cse0) (<= 0 .cse1))) (or (not (= |c_ULTIMATE.start_cstrcpy_~from#1.offset| (+ .cse0 (- 1)))) (= |c_ULTIMATE.start_cstrcpy_#t~mem4#1| 0)) (<= .cse1 .cse0) (<= 3 .cse0) (= (+ (- 1) |c_ULTIMATE.start_cstrcpy_~from#1.offset|) 1))) is different from false [2021-12-28 05:45:16,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:16,083 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2021-12-28 05:45:16,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 05:45:16,086 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.6) internal successors, (91), 36 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-28 05:45:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:16,086 INFO L225 Difference]: With dead ends: 48 [2021-12-28 05:45:16,086 INFO L226 Difference]: Without dead ends: 48 [2021-12-28 05:45:16,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=379, Invalid=1975, Unknown=2, NotChecked=94, Total=2450 [2021-12-28 05:45:16,087 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:16,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 186 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 426 Invalid, 0 Unknown, 106 Unchecked, 0.2s Time] [2021-12-28 05:45:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-28 05:45:16,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2021-12-28 05:45:16,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2021-12-28 05:45:16,089 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 33 [2021-12-28 05:45:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:16,089 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2021-12-28 05:45:16,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.6) internal successors, (91), 36 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2021-12-28 05:45:16,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-28 05:45:16,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:16,090 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:16,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:16,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:16,310 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:16,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:16,311 INFO L85 PathProgramCache]: Analyzing trace with hash 651531229, now seen corresponding path program 3 times [2021-12-28 05:45:16,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:16,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601633833] [2021-12-28 05:45:16,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:16,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:16,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:16,409 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 1 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:16,410 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601633833] [2021-12-28 05:45:16,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601633833] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131247402] [2021-12-28 05:45:16,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:45:16,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:16,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:16,411 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) [2021-12-28 05:45:16,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-28 05:45:16,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-12-28 05:45:16,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:16,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-28 05:45:16,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:16,506 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:45:16,507 INFO L387 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 [2021-12-28 05:45:16,517 INFO L387 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 [2021-12-28 05:45:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:16,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:17,138 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:17,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131247402] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:17,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:17,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2021-12-28 05:45:17,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474302538] [2021-12-28 05:45:17,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:17,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-28 05:45:17,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:17,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-28 05:45:17,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-12-28 05:45:17,141 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:17,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:17,461 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-12-28 05:45:17,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-28 05:45:17,462 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-12-28 05:45:17,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:17,462 INFO L225 Difference]: With dead ends: 43 [2021-12-28 05:45:17,462 INFO L226 Difference]: Without dead ends: 43 [2021-12-28 05:45:17,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 05:45:17,463 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:17,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 103 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:45:17,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-28 05:45:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-12-28 05:45:17,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-12-28 05:45:17,468 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 34 [2021-12-28 05:45:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:17,469 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-12-28 05:45:17,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.4814814814814814) internal successors, (94), 28 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-12-28 05:45:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-28 05:45:17,470 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:17,470 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:17,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:17,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-12-28 05:45:17,677 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:17,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:17,678 INFO L85 PathProgramCache]: Analyzing trace with hash -671378910, now seen corresponding path program 4 times [2021-12-28 05:45:17,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:17,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735826539] [2021-12-28 05:45:17,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:17,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:17,781 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 19 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:17,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:17,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735826539] [2021-12-28 05:45:17,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735826539] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:17,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015650243] [2021-12-28 05:45:17,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 05:45:17,782 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:17,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:17,783 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) [2021-12-28 05:45:17,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-28 05:45:17,846 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 05:45:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:17,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-28 05:45:17,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:17,868 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:45:17,868 INFO L387 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 [2021-12-28 05:45:18,086 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 32 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:18,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:18,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015650243] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:18,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:18,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 28 [2021-12-28 05:45:18,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753186651] [2021-12-28 05:45:18,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:18,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-28 05:45:18,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:18,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-28 05:45:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2021-12-28 05:45:18,258 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:18,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:18,512 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2021-12-28 05:45:18,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:45:18,513 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-28 05:45:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:18,513 INFO L225 Difference]: With dead ends: 69 [2021-12-28 05:45:18,513 INFO L226 Difference]: Without dead ends: 50 [2021-12-28 05:45:18,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=1042, Unknown=0, NotChecked=0, Total=1332 [2021-12-28 05:45:18,514 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:18,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 88 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:45:18,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-28 05:45:18,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2021-12-28 05:45:18,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:18,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-12-28 05:45:18,516 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 38 [2021-12-28 05:45:18,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:18,516 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-12-28 05:45:18,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.1785714285714284) internal successors, (89), 28 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:18,516 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-12-28 05:45:18,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-28 05:45:18,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:18,517 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:18,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:18,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-12-28 05:45:18,719 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:18,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:18,720 INFO L85 PathProgramCache]: Analyzing trace with hash -452353921, now seen corresponding path program 5 times [2021-12-28 05:45:18,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:18,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263098398] [2021-12-28 05:45:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:18,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:18,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:18,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263098398] [2021-12-28 05:45:18,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263098398] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:18,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442019966] [2021-12-28 05:45:18,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 05:45:18,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:18,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:18,839 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) [2021-12-28 05:45:18,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-28 05:45:18,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-28 05:45:18,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:18,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-28 05:45:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:18,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:45:18,958 INFO L387 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 [2021-12-28 05:45:18,961 INFO L387 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 [2021-12-28 05:45:19,244 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:19,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:19,611 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 28 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:19,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442019966] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:19,611 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:19,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 32 [2021-12-28 05:45:19,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013669254] [2021-12-28 05:45:19,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:19,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 05:45:19,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:19,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 05:45:19,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2021-12-28 05:45:19,613 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 33 states, 32 states have (on average 3.65625) internal successors, (117), 33 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:19,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:19,972 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-12-28 05:45:19,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 05:45:19,973 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.65625) internal successors, (117), 33 states have internal predecessors, (117), 0 states have call successors, (0), 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 [2021-12-28 05:45:19,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:19,973 INFO L225 Difference]: With dead ends: 50 [2021-12-28 05:45:19,973 INFO L226 Difference]: Without dead ends: 50 [2021-12-28 05:45:19,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=351, Invalid=1455, Unknown=0, NotChecked=0, Total=1806 [2021-12-28 05:45:19,974 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 137 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:19,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 135 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 05:45:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-28 05:45:19,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-12-28 05:45:19,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:19,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-12-28 05:45:19,975 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 42 [2021-12-28 05:45:19,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:19,976 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-12-28 05:45:19,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.65625) internal successors, (117), 33 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:19,976 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-12-28 05:45:19,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-12-28 05:45:19,976 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:19,976 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:19,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:20,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-12-28 05:45:20,183 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:20,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:20,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1531708431, now seen corresponding path program 5 times [2021-12-28 05:45:20,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:20,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383220363] [2021-12-28 05:45:20,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:20,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:20,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:20,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:20,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383220363] [2021-12-28 05:45:20,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383220363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:20,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302546776] [2021-12-28 05:45:20,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 05:45:20,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:20,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:20,412 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) [2021-12-28 05:45:20,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-28 05:45:20,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-12-28 05:45:20,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:20,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 64 conjunts are in the unsatisfiable core [2021-12-28 05:45:20,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:20,548 INFO L387 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 [2021-12-28 05:45:20,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:45:20,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:45:20,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:20,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:20,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:20,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-28 05:45:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:20,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:20,937 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_500 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_500) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-28 05:45:20,943 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_500 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_500) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-28 05:45:20,953 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_500 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_500) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-28 05:45:20,965 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_500 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_500) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-28 05:45:20,975 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_500 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_500) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 4)) 0)) is different from false [2021-12-28 05:45:20,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:20,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:45:20,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:20,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:45:20,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:45:21,158 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 35 not checked. [2021-12-28 05:45:21,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302546776] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:21,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:21,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 33 [2021-12-28 05:45:21,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282036806] [2021-12-28 05:45:21,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:21,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-28 05:45:21,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:21,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-28 05:45:21,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=684, Unknown=5, NotChecked=280, Total=1056 [2021-12-28 05:45:21,160 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:21,527 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2021-12-28 05:45:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-28 05:45:21,527 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 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 45 [2021-12-28 05:45:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:21,527 INFO L225 Difference]: With dead ends: 76 [2021-12-28 05:45:21,527 INFO L226 Difference]: Without dead ends: 55 [2021-12-28 05:45:21,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 38 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=135, Invalid=1070, Unknown=5, NotChecked=350, Total=1560 [2021-12-28 05:45:21,528 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 286 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:21,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 268 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 465 Invalid, 0 Unknown, 286 Unchecked, 0.2s Time] [2021-12-28 05:45:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-28 05:45:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-12-28 05:45:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 50 states have (on average 1.06) internal successors, (53), 51 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) [2021-12-28 05:45:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-12-28 05:45:21,529 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2021-12-28 05:45:21,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:21,530 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-12-28 05:45:21,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8181818181818183) internal successors, (93), 33 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:21,530 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-12-28 05:45:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-28 05:45:21,530 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:21,530 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:21,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:21,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-28 05:45:21,741 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:21,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:21,742 INFO L85 PathProgramCache]: Analyzing trace with hash 801080082, now seen corresponding path program 6 times [2021-12-28 05:45:21,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:21,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741211369] [2021-12-28 05:45:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:21,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:21,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:21,894 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:21,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:21,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741211369] [2021-12-28 05:45:21,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741211369] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:21,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980604418] [2021-12-28 05:45:21,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 05:45:21,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:21,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:21,896 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) [2021-12-28 05:45:21,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-28 05:45:21,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-28 05:45:21,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:21,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-28 05:45:21,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:22,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:22,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-28 05:45:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 28 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:22,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980604418] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:22,533 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:22,534 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 35 [2021-12-28 05:45:22,534 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037153538] [2021-12-28 05:45:22,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:22,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-28 05:45:22,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:22,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-28 05:45:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2021-12-28 05:45:22,535 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 36 states, 35 states have (on average 3.342857142857143) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:22,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:22,904 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-12-28 05:45:22,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 05:45:22,905 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.342857142857143) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 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 [2021-12-28 05:45:22,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:22,905 INFO L225 Difference]: With dead ends: 59 [2021-12-28 05:45:22,905 INFO L226 Difference]: Without dead ends: 59 [2021-12-28 05:45:22,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=443, Invalid=1813, Unknown=0, NotChecked=0, Total=2256 [2021-12-28 05:45:22,906 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 245 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:22,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 182 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:45:22,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-12-28 05:45:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2021-12-28 05:45:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 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) [2021-12-28 05:45:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-12-28 05:45:22,911 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 49 [2021-12-28 05:45:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:22,911 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-12-28 05:45:22,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.342857142857143) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-12-28 05:45:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-28 05:45:22,912 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:22,912 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:22,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:23,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-28 05:45:23,115 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:23,116 INFO L85 PathProgramCache]: Analyzing trace with hash -936321247, now seen corresponding path program 6 times [2021-12-28 05:45:23,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:23,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815024012] [2021-12-28 05:45:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:23,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:23,256 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:23,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:23,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815024012] [2021-12-28 05:45:23,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815024012] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:23,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584284827] [2021-12-28 05:45:23,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 05:45:23,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:23,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:23,257 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) [2021-12-28 05:45:23,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-28 05:45:23,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-28 05:45:23,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:23,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-28 05:45:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:23,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:45:23,396 INFO L387 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 [2021-12-28 05:45:23,398 INFO L387 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 [2021-12-28 05:45:23,791 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:23,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:24,266 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 45 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:24,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584284827] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:24,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:24,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 39 [2021-12-28 05:45:24,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80039372] [2021-12-28 05:45:24,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:24,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-28 05:45:24,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:24,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-28 05:45:24,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-12-28 05:45:24,268 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 40 states, 39 states have (on average 3.641025641025641) internal successors, (142), 40 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:24,774 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2021-12-28 05:45:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 05:45:24,775 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 3.641025641025641) internal successors, (142), 40 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-12-28 05:45:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:24,775 INFO L225 Difference]: With dead ends: 58 [2021-12-28 05:45:24,775 INFO L226 Difference]: Without dead ends: 58 [2021-12-28 05:45:24,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=2120, Unknown=0, NotChecked=0, Total=2652 [2021-12-28 05:45:24,776 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 167 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:24,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 158 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:45:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-12-28 05:45:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-12-28 05:45:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 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) [2021-12-28 05:45:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-12-28 05:45:24,777 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 50 [2021-12-28 05:45:24,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:24,778 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-12-28 05:45:24,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 3.641025641025641) internal successors, (142), 40 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:24,778 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-12-28 05:45:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-28 05:45:24,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:24,778 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:24,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-28 05:45:25,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-12-28 05:45:25,004 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:25,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:25,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1866312237, now seen corresponding path program 7 times [2021-12-28 05:45:25,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:25,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727705675] [2021-12-28 05:45:25,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:25,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 11 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:25,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:25,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727705675] [2021-12-28 05:45:25,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727705675] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:25,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476783932] [2021-12-28 05:45:25,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 05:45:25,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:25,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:25,254 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) [2021-12-28 05:45:25,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-28 05:45:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:25,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 73 conjunts are in the unsatisfiable core [2021-12-28 05:45:25,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:25,349 INFO L387 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 [2021-12-28 05:45:25,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:45:25,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:45:25,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:25,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:25,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:25,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:25,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-28 05:45:25,764 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 11 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:25,764 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:25,777 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_677) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-28 05:45:25,793 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_677) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-28 05:45:25,803 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_677) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-28 05:45:25,814 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_677) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-28 05:45:25,824 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_677) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-28 05:45:25,836 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_677 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_677) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 5 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-28 05:45:25,840 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:25,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:45:25,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:25,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:45:25,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:45:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 11 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 54 not checked. [2021-12-28 05:45:26,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476783932] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:26,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:26,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 37 [2021-12-28 05:45:26,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002409749] [2021-12-28 05:45:26,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:26,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-12-28 05:45:26,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:26,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-12-28 05:45:26,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=852, Unknown=6, NotChecked=378, Total=1332 [2021-12-28 05:45:26,063 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 37 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:26,501 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2021-12-28 05:45:26,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 05:45:26,501 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 37 states have internal predecessors, (109), 0 states have call successors, (0), 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 [2021-12-28 05:45:26,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:26,501 INFO L225 Difference]: With dead ends: 88 [2021-12-28 05:45:26,501 INFO L226 Difference]: Without dead ends: 63 [2021-12-28 05:45:26,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=1351, Unknown=6, NotChecked=474, Total=1980 [2021-12-28 05:45:26,502 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 339 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:26,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 348 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 691 Invalid, 0 Unknown, 339 Unchecked, 0.2s Time] [2021-12-28 05:45:26,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-12-28 05:45:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2021-12-28 05:45:26,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-12-28 05:45:26,504 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 53 [2021-12-28 05:45:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:26,504 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-12-28 05:45:26,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 37 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-12-28 05:45:26,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-12-28 05:45:26,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:26,505 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:26,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-28 05:45:26,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:26,719 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:26,720 INFO L85 PathProgramCache]: Analyzing trace with hash -795904464, now seen corresponding path program 8 times [2021-12-28 05:45:26,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:26,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273873858] [2021-12-28 05:45:26,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:26,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:26,917 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 28 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:26,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273873858] [2021-12-28 05:45:26,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273873858] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288489311] [2021-12-28 05:45:26,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:45:26,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:26,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:26,927 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) [2021-12-28 05:45:26,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-28 05:45:27,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:45:27,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:27,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-28 05:45:27,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:27,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:27,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-28 05:45:27,560 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:27,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288489311] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:27,560 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:27,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 35 [2021-12-28 05:45:27,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283198480] [2021-12-28 05:45:27,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:27,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-12-28 05:45:27,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:27,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-12-28 05:45:27,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1095, Unknown=0, NotChecked=0, Total=1260 [2021-12-28 05:45:27,562 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 36 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:27,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:27,934 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2021-12-28 05:45:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 05:45:27,934 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 36 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-12-28 05:45:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:27,935 INFO L225 Difference]: With dead ends: 67 [2021-12-28 05:45:27,935 INFO L226 Difference]: Without dead ends: 67 [2021-12-28 05:45:27,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2021-12-28 05:45:27,936 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 308 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:27,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 248 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:45:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-28 05:45:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 63. [2021-12-28 05:45:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 62 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) [2021-12-28 05:45:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2021-12-28 05:45:27,938 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 57 [2021-12-28 05:45:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:27,938 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2021-12-28 05:45:27,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 3.3142857142857145) internal successors, (116), 36 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2021-12-28 05:45:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-28 05:45:27,939 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:27,939 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:27,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:28,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:28,148 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:28,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:28,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1096765379, now seen corresponding path program 7 times [2021-12-28 05:45:28,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:28,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596150820] [2021-12-28 05:45:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:28,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:28,326 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 28 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:28,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:28,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596150820] [2021-12-28 05:45:28,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596150820] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:28,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211076907] [2021-12-28 05:45:28,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 05:45:28,326 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:28,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:28,327 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) [2021-12-28 05:45:28,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-28 05:45:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:28,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-28 05:45:28,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:28,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:45:28,429 INFO L387 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 [2021-12-28 05:45:28,431 INFO L387 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 [2021-12-28 05:45:28,878 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:28,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:29,442 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 66 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:29,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211076907] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:29,443 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:29,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 44 [2021-12-28 05:45:29,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353119956] [2021-12-28 05:45:29,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:29,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-28 05:45:29,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:29,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-28 05:45:29,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2021-12-28 05:45:29,444 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 45 states, 44 states have (on average 3.75) internal successors, (165), 45 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:30,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:30,042 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2021-12-28 05:45:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-28 05:45:30,043 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.75) internal successors, (165), 45 states have internal predecessors, (165), 0 states have call successors, (0), 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 58 [2021-12-28 05:45:30,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:30,044 INFO L225 Difference]: With dead ends: 66 [2021-12-28 05:45:30,044 INFO L226 Difference]: Without dead ends: 66 [2021-12-28 05:45:30,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=627, Invalid=2795, Unknown=0, NotChecked=0, Total=3422 [2021-12-28 05:45:30,045 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 285 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:30,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 228 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:45:30,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-12-28 05:45:30,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2021-12-28 05:45:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-12-28 05:45:30,049 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 58 [2021-12-28 05:45:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:30,049 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-12-28 05:45:30,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.75) internal successors, (165), 45 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-12-28 05:45:30,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-28 05:45:30,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:30,049 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:30,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:30,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:30,254 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:30,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:30,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1921179211, now seen corresponding path program 9 times [2021-12-28 05:45:30,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:30,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075161311] [2021-12-28 05:45:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:30,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:30,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 13 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:30,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:30,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075161311] [2021-12-28 05:45:30,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075161311] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:30,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865174318] [2021-12-28 05:45:30,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:45:30,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:30,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:30,559 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) [2021-12-28 05:45:30,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-28 05:45:30,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-12-28 05:45:30,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:30,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-28 05:45:30,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:30,826 INFO L387 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 [2021-12-28 05:45:31,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:45:31,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:45:31,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:31,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:31,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:31,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:31,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:31,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-28 05:45:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 13 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:31,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:31,314 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_880 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_880) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-28 05:45:31,319 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_880 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_880) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-28 05:45:31,342 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_880 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_880) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-28 05:45:31,353 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_880 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_880) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)))) is different from false [2021-12-28 05:45:31,363 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_880 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_880) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-28 05:45:31,372 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_880 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_880) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)))) is different from false [2021-12-28 05:45:31,381 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_880 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_880) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 6 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-28 05:45:31,385 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:31,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:45:31,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:31,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:45:31,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:45:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 13 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 77 not checked. [2021-12-28 05:45:31,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865174318] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:31,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:31,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 41 [2021-12-28 05:45:31,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122141080] [2021-12-28 05:45:31,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:31,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-12-28 05:45:31,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:31,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-12-28 05:45:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1038, Unknown=7, NotChecked=490, Total=1640 [2021-12-28 05:45:31,625 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 41 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:32,386 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-12-28 05:45:32,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-28 05:45:32,386 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 41 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-28 05:45:32,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:32,386 INFO L225 Difference]: With dead ends: 100 [2021-12-28 05:45:32,386 INFO L226 Difference]: Without dead ends: 71 [2021-12-28 05:45:32,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 7 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=2313, Unknown=7, NotChecked=728, Total=3306 [2021-12-28 05:45:32,387 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:32,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 431 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 833 Invalid, 0 Unknown, 502 Unchecked, 0.3s Time] [2021-12-28 05:45:32,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-12-28 05:45:32,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2021-12-28 05:45:32,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 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) [2021-12-28 05:45:32,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2021-12-28 05:45:32,389 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 61 [2021-12-28 05:45:32,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:32,389 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2021-12-28 05:45:32,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.024390243902439) internal successors, (124), 41 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:32,389 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2021-12-28 05:45:32,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-28 05:45:32,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:32,390 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:32,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:32,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:32,595 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:32,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash 940963662, now seen corresponding path program 10 times [2021-12-28 05:45:32,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:32,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144355666] [2021-12-28 05:45:32,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:32,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:32,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:32,813 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 45 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:32,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:32,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144355666] [2021-12-28 05:45:32,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144355666] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:32,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003614361] [2021-12-28 05:45:32,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 05:45:32,814 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:32,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:32,815 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) [2021-12-28 05:45:32,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-12-28 05:45:32,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 05:45:32,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:32,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-28 05:45:32,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:32,948 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:45:32,949 INFO L387 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 [2021-12-28 05:45:32,956 INFO L387 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 [2021-12-28 05:45:33,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-28 05:45:33,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:45:33,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:45:33,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:45:33,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:45:33,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:45:33,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:45:33,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:33,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-28 05:45:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 72 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:33,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:34,545 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_cstrcpy_~from#1.offset_138| Int) (v_ArrVal_962 (Array Int Int))) (or (<= (+ 8 |v_ULTIMATE.start_cstrcpy_~from#1.offset_138|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_962) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 6 |v_ULTIMATE.start_cstrcpy_~from#1.offset_138|)) 0) (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_~from#1.offset_138|) (not (<= 0 |v_ULTIMATE.start_cstrcpy_~from#1.offset_138|)))) is different from false [2021-12-28 05:45:34,553 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:34,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:45:34,558 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:34,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:45:34,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:45:35,789 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 91 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:35,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003614361] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:35,789 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:35,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 60 [2021-12-28 05:45:35,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540342605] [2021-12-28 05:45:35,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:35,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-12-28 05:45:35,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:35,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-12-28 05:45:35,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=3132, Unknown=1, NotChecked=116, Total=3660 [2021-12-28 05:45:35,795 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 61 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 61 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:36,681 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#length| |c_ULTIMATE.start_cstrcpy_~from#1.base|)) (.cse1 (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2))) (and (<= 7 .cse0) (<= 6 |c_ULTIMATE.start_cstrcpy_~from#1.offset|) (or (not (= |c_ULTIMATE.start_cstrcpy_~from#1.offset| (+ .cse0 (- 1)))) (= |c_ULTIMATE.start_cstrcpy_#t~mem4#1| 0)) (<= .cse1 .cse0) (or (forall ((v_ArrVal_962 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_962) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) (and (<= (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3) .cse0) (<= 0 .cse1))) (<= |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6))) is different from false [2021-12-28 05:45:36,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:36,891 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-12-28 05:45:36,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-28 05:45:36,892 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 61 states have internal predecessors, (187), 0 states have call successors, (0), 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 65 [2021-12-28 05:45:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:36,892 INFO L225 Difference]: With dead ends: 80 [2021-12-28 05:45:36,892 INFO L226 Difference]: Without dead ends: 80 [2021-12-28 05:45:36,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=903, Invalid=5104, Unknown=7, NotChecked=306, Total=6320 [2021-12-28 05:45:36,894 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 132 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:36,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 373 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 789 Invalid, 0 Unknown, 293 Unchecked, 0.3s Time] [2021-12-28 05:45:36,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-28 05:45:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-12-28 05:45:36,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:36,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-12-28 05:45:36,895 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 65 [2021-12-28 05:45:36,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:36,902 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-12-28 05:45:36,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 3.1166666666666667) internal successors, (187), 61 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:36,902 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-12-28 05:45:36,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-28 05:45:36,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:36,903 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:36,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-12-28 05:45:37,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:37,121 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:37,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:37,122 INFO L85 PathProgramCache]: Analyzing trace with hash -894897563, now seen corresponding path program 8 times [2021-12-28 05:45:37,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:37,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922418436] [2021-12-28 05:45:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:37,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:37,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:37,334 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:37,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:37,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922418436] [2021-12-28 05:45:37,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922418436] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:37,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016002412] [2021-12-28 05:45:37,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:45:37,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:37,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:37,348 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) [2021-12-28 05:45:37,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-12-28 05:45:37,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:45:37,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:37,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 59 conjunts are in the unsatisfiable core [2021-12-28 05:45:37,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:37,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-28 05:45:37,475 INFO L387 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 [2021-12-28 05:45:37,477 INFO L387 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 [2021-12-28 05:45:37,992 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:37,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:38,639 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 91 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:38,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016002412] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:38,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:38,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 50 [2021-12-28 05:45:38,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599201894] [2021-12-28 05:45:38,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:38,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-28 05:45:38,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:38,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-28 05:45:38,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=2238, Unknown=0, NotChecked=0, Total=2550 [2021-12-28 05:45:38,641 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 51 states, 50 states have (on average 3.78) internal successors, (189), 51 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:39,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:39,396 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-12-28 05:45:39,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-28 05:45:39,397 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.78) internal successors, (189), 51 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-28 05:45:39,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:39,399 INFO L225 Difference]: With dead ends: 75 [2021-12-28 05:45:39,399 INFO L226 Difference]: Without dead ends: 75 [2021-12-28 05:45:39,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 914 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=795, Invalid=3627, Unknown=0, NotChecked=0, Total=4422 [2021-12-28 05:45:39,400 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 283 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:39,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 341 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:45:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-28 05:45:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-28 05:45:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2021-12-28 05:45:39,401 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 66 [2021-12-28 05:45:39,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:39,402 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2021-12-28 05:45:39,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.78) internal successors, (189), 51 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2021-12-28 05:45:39,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-28 05:45:39,402 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:39,402 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:39,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-12-28 05:45:39,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:39,618 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:39,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:39,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1905496918, now seen corresponding path program 9 times [2021-12-28 05:45:39,619 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:39,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848577316] [2021-12-28 05:45:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:39,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:39,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 99 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:39,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:39,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848577316] [2021-12-28 05:45:39,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848577316] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:39,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010453223] [2021-12-28 05:45:39,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:45:39,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:39,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:39,844 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) [2021-12-28 05:45:39,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-12-28 05:45:40,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-12-28 05:45:40,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:40,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-28 05:45:40,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:40,194 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:45:40,195 INFO L387 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 [2021-12-28 05:45:40,757 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 128 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:40,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:41,184 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 128 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:41,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010453223] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:41,184 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:41,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 48 [2021-12-28 05:45:41,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152514220] [2021-12-28 05:45:41,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:41,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-12-28 05:45:41,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:41,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-12-28 05:45:41,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1853, Unknown=0, NotChecked=0, Total=2256 [2021-12-28 05:45:41,186 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 48 states, 48 states have (on average 3.5625) internal successors, (171), 48 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:41,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:41,732 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2021-12-28 05:45:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-28 05:45:41,732 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.5625) internal successors, (171), 48 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-12-28 05:45:41,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:41,732 INFO L225 Difference]: With dead ends: 117 [2021-12-28 05:45:41,732 INFO L226 Difference]: Without dead ends: 82 [2021-12-28 05:45:41,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=817, Invalid=3343, Unknown=0, NotChecked=0, Total=4160 [2021-12-28 05:45:41,733 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 91 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:41,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 198 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 05:45:41,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-28 05:45:41,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2021-12-28 05:45:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:41,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2021-12-28 05:45:41,735 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 70 [2021-12-28 05:45:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:41,735 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2021-12-28 05:45:41,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5625) internal successors, (171), 48 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:41,735 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2021-12-28 05:45:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 05:45:41,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:41,736 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:41,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:41,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-12-28 05:45:41,941 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:41,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1730266887, now seen corresponding path program 10 times [2021-12-28 05:45:41,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:41,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753909186] [2021-12-28 05:45:41,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:41,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 66 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:42,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:42,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753909186] [2021-12-28 05:45:42,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753909186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:42,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468618885] [2021-12-28 05:45:42,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 05:45:42,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:42,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:42,185 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) [2021-12-28 05:45:42,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-12-28 05:45:42,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 05:45:42,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:42,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-28 05:45:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:42,337 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:45:42,337 INFO L387 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 [2021-12-28 05:45:42,345 INFO L387 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 [2021-12-28 05:45:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-28 05:45:43,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-12-28 05:45:43,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468618885] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:43,971 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:43,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14, 14] total 45 [2021-12-28 05:45:43,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134327893] [2021-12-28 05:45:43,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:43,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-28 05:45:43,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:43,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-28 05:45:43,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1800, Unknown=0, NotChecked=0, Total=2070 [2021-12-28 05:45:43,972 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:46,062 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2021-12-28 05:45:46,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-12-28 05:45:46,067 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-12-28 05:45:46,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:46,068 INFO L225 Difference]: With dead ends: 120 [2021-12-28 05:45:46,068 INFO L226 Difference]: Without dead ends: 120 [2021-12-28 05:45:46,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1235, Invalid=5245, Unknown=0, NotChecked=0, Total=6480 [2021-12-28 05:45:46,068 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 295 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 1069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:46,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 355 Invalid, 1069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 988 Invalid, 0 Unknown, 2 Unchecked, 0.4s Time] [2021-12-28 05:45:46,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-28 05:45:46,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2021-12-28 05:45:46,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 110 states have (on average 1.1) internal successors, (121), 111 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2021-12-28 05:45:46,070 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 74 [2021-12-28 05:45:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:46,070 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2021-12-28 05:45:46,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 3.511111111111111) internal successors, (158), 46 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:46,071 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2021-12-28 05:45:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 05:45:46,071 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:46,071 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:46,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:46,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-12-28 05:45:46,271 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:46,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:46,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1816661881, now seen corresponding path program 11 times [2021-12-28 05:45:46,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:46,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292653307] [2021-12-28 05:45:46,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:46,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:46,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:46,716 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 17 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:46,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292653307] [2021-12-28 05:45:46,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292653307] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:46,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795567937] [2021-12-28 05:45:46,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-28 05:45:46,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:46,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:46,717 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) [2021-12-28 05:45:46,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-12-28 05:45:47,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-12-28 05:45:47,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:47,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 102 conjunts are in the unsatisfiable core [2021-12-28 05:45:47,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:47,076 INFO L387 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 [2021-12-28 05:45:47,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:45:47,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:45:47,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:47,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:47,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:47,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:47,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:47,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:47,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:47,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-28 05:45:47,679 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 17 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:47,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:47,692 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1288 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1288) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-28 05:45:47,698 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1288 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1288) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-28 05:45:47,708 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1288 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1288) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-28 05:45:47,718 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1288 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1288) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-28 05:45:47,730 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1288 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1288) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-28 05:45:47,742 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1288 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1288) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-28 05:45:47,752 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1288 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1288) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~from#1.offset|)))) is different from false [2021-12-28 05:45:47,762 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1288 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1288) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-28 05:45:47,773 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1288 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1288) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-28 05:45:47,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:47,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:45:47,784 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:47,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:45:47,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:45:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 17 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 135 not checked. [2021-12-28 05:45:48,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795567937] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:48,106 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:48,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 49 [2021-12-28 05:45:48,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254025973] [2021-12-28 05:45:48,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:48,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-28 05:45:48,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:48,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-28 05:45:48,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1464, Unknown=9, NotChecked=756, Total=2352 [2021-12-28 05:45:48,107 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:48,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:48,931 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2021-12-28 05:45:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-12-28 05:45:48,931 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-12-28 05:45:48,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:48,933 INFO L225 Difference]: With dead ends: 156 [2021-12-28 05:45:48,933 INFO L226 Difference]: Without dead ends: 119 [2021-12-28 05:45:48,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 130 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=191, Invalid=2386, Unknown=9, NotChecked=954, Total=3540 [2021-12-28 05:45:48,934 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 44 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1384 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 598 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:48,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 651 Invalid, 1996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1384 Invalid, 0 Unknown, 598 Unchecked, 0.4s Time] [2021-12-28 05:45:48,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-28 05:45:48,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2021-12-28 05:45:48,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 114 states have (on average 1.0964912280701755) internal successors, (125), 115 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:48,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2021-12-28 05:45:48,944 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 77 [2021-12-28 05:45:48,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:48,945 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2021-12-28 05:45:48,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.204081632653061) internal successors, (157), 49 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2021-12-28 05:45:48,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-28 05:45:48,945 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:48,945 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:48,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-12-28 05:45:49,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-12-28 05:45:49,151 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:49,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:49,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1542890378, now seen corresponding path program 12 times [2021-12-28 05:45:49,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:49,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153768994] [2021-12-28 05:45:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:49,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:49,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:49,450 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 91 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:49,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:49,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153768994] [2021-12-28 05:45:49,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153768994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:49,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538586718] [2021-12-28 05:45:49,450 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-28 05:45:49,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:49,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:49,451 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) [2021-12-28 05:45:49,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-12-28 05:45:50,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-12-28 05:45:50,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:50,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 52 conjunts are in the unsatisfiable core [2021-12-28 05:45:50,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:50,456 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:45:50,456 INFO L387 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 [2021-12-28 05:45:51,184 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 120 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:51,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:52,082 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 153 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:52,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538586718] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:52,082 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:52,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 63 [2021-12-28 05:45:52,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660647342] [2021-12-28 05:45:52,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:52,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-12-28 05:45:52,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:52,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-12-28 05:45:52,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=3489, Unknown=0, NotChecked=0, Total=4032 [2021-12-28 05:45:52,083 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 64 states, 63 states have (on average 3.7301587301587302) internal successors, (235), 64 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:52,964 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2021-12-28 05:45:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-28 05:45:52,964 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.7301587301587302) internal successors, (235), 64 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-28 05:45:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:52,971 INFO L225 Difference]: With dead ends: 116 [2021-12-28 05:45:52,971 INFO L226 Difference]: Without dead ends: 116 [2021-12-28 05:45:52,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1338, Invalid=5634, Unknown=0, NotChecked=0, Total=6972 [2021-12-28 05:45:52,973 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 371 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:52,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 270 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-28 05:45:52,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-28 05:45:52,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-12-28 05:45:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 114 states have (on average 1.087719298245614) internal successors, (124), 115 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 124 transitions. [2021-12-28 05:45:52,978 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 124 transitions. Word has length 81 [2021-12-28 05:45:52,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:52,978 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 124 transitions. [2021-12-28 05:45:52,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.7301587301587302) internal successors, (235), 64 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 124 transitions. [2021-12-28 05:45:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-28 05:45:52,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:52,979 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:52,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-12-28 05:45:53,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:53,180 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:53,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:53,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1904201381, now seen corresponding path program 13 times [2021-12-28 05:45:53,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:53,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973896164] [2021-12-28 05:45:53,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:53,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 19 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:53,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:53,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973896164] [2021-12-28 05:45:53,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973896164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:53,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485679829] [2021-12-28 05:45:53,677 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-28 05:45:53,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:53,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:53,678 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) [2021-12-28 05:45:53,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-12-28 05:45:53,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:53,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 437 conjuncts, 109 conjunts are in the unsatisfiable core [2021-12-28 05:45:53,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:53,838 INFO L387 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 [2021-12-28 05:45:54,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:45:54,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:45:54,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:54,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:54,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:54,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:54,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:54,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:54,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:54,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:45:54,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-28 05:45:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 19 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:54,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:54,544 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1478 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1478) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-28 05:45:54,550 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1478 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1478) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-28 05:45:54,562 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1478 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1478) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-28 05:45:54,573 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1478 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1478) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-28 05:45:54,582 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1478 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1478) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-28 05:45:54,591 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1478 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1478) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-28 05:45:54,600 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1478 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1478) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~from#1.offset|)) 0)) is different from false [2021-12-28 05:45:54,609 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1478 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1478) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-28 05:45:54,619 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1478 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1478) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2021-12-28 05:45:54,628 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1478 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1478) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 9 |c_ULTIMATE.start_main_~nondetString~0#1.offset|)) 0)) is different from false [2021-12-28 05:45:54,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:54,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:45:54,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:45:54,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:45:54,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:45:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 19 proven. 154 refuted. 0 times theorem prover too weak. 0 trivial. 170 not checked. [2021-12-28 05:45:55,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485679829] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:55,007 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:55,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 27] total 53 [2021-12-28 05:45:55,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190050398] [2021-12-28 05:45:55,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:55,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-12-28 05:45:55,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:55,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-12-28 05:45:55,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1704, Unknown=10, NotChecked=910, Total=2756 [2021-12-28 05:45:55,009 INFO L87 Difference]: Start difference. First operand 116 states and 124 transitions. Second operand has 53 states, 53 states have (on average 3.2641509433962264) internal successors, (173), 53 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:56,048 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2021-12-28 05:45:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-28 05:45:56,048 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.2641509433962264) internal successors, (173), 53 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-12-28 05:45:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:56,048 INFO L225 Difference]: With dead ends: 164 [2021-12-28 05:45:56,049 INFO L226 Difference]: Without dead ends: 123 [2021-12-28 05:45:56,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 144 SyntacticMatches, 17 SemanticMatches, 63 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=205, Invalid=2795, Unknown=10, NotChecked=1150, Total=4160 [2021-12-28 05:45:56,049 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 39 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1867 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 2748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 867 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:56,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 795 Invalid, 2748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1867 Invalid, 0 Unknown, 867 Unchecked, 0.6s Time] [2021-12-28 05:45:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-12-28 05:45:56,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2021-12-28 05:45:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 118 states have (on average 1.0847457627118644) internal successors, (128), 119 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2021-12-28 05:45:56,051 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 85 [2021-12-28 05:45:56,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:56,052 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2021-12-28 05:45:56,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.2641509433962264) internal successors, (173), 53 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:56,052 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2021-12-28 05:45:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-28 05:45:56,052 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:56,052 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:56,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-12-28 05:45:56,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-12-28 05:45:56,261 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:56,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:56,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1305948504, now seen corresponding path program 14 times [2021-12-28 05:45:56,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:56,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414146037] [2021-12-28 05:45:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:56,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:45:56,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:45:56,561 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:56,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:45:56,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414146037] [2021-12-28 05:45:56,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414146037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:45:56,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224910000] [2021-12-28 05:45:56,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-28 05:45:56,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:45:56,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:45:56,563 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) [2021-12-28 05:45:56,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-12-28 05:45:56,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-28 05:45:56,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:45:56,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 65 conjunts are in the unsatisfiable core [2021-12-28 05:45:56,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:45:56,732 INFO L353 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-28 05:45:56,733 INFO L387 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 [2021-12-28 05:45:57,535 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 153 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:57,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:45:58,560 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 190 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:45:58,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224910000] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:45:58,561 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:45:58,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 68 [2021-12-28 05:45:58,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64213832] [2021-12-28 05:45:58,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:45:58,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-12-28 05:45:58,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:45:58,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-12-28 05:45:58,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=4152, Unknown=0, NotChecked=0, Total=4692 [2021-12-28 05:45:58,562 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 69 states, 68 states have (on average 3.7794117647058822) internal successors, (257), 69 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:45:59,765 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2021-12-28 05:45:59,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-28 05:45:59,765 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 3.7794117647058822) internal successors, (257), 69 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-12-28 05:45:59,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:45:59,766 INFO L225 Difference]: With dead ends: 120 [2021-12-28 05:45:59,766 INFO L226 Difference]: Without dead ends: 120 [2021-12-28 05:45:59,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1817 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1419, Invalid=6771, Unknown=0, NotChecked=0, Total=8190 [2021-12-28 05:45:59,767 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 412 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 1663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 05:45:59,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 558 Invalid, 1663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-28 05:45:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-12-28 05:45:59,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2021-12-28 05:45:59,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 118 states have (on average 1.076271186440678) internal successors, (127), 119 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:59,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2021-12-28 05:45:59,771 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 89 [2021-12-28 05:45:59,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:45:59,771 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2021-12-28 05:45:59,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 3.7794117647058822) internal successors, (257), 69 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:45:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2021-12-28 05:45:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 05:45:59,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:45:59,772 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:45:59,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-12-28 05:45:59,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-12-28 05:45:59,979 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:45:59,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:45:59,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1102366013, now seen corresponding path program 15 times [2021-12-28 05:45:59,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:45:59,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908585170] [2021-12-28 05:45:59,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:45:59,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:00,531 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 21 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:00,532 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:00,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908585170] [2021-12-28 05:46:00,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908585170] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:00,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603073019] [2021-12-28 05:46:00,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-28 05:46:00,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:00,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:00,533 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) [2021-12-28 05:46:00,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-12-28 05:46:02,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-12-28 05:46:02,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:02,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 474 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-28 05:46:02,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:02,229 INFO L387 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 [2021-12-28 05:46:02,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-28 05:46:02,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-28 05:46:02,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:46:02,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:46:02,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:46:02,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:46:02,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:46:02,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:46:02,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:46:02,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:46:02,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-28 05:46:02,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-28 05:46:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 21 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:02,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:03,006 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1685 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1685) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 1)) 0)) is different from false [2021-12-28 05:46:03,012 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1685 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1685) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 2)) 0)) is different from false [2021-12-28 05:46:03,021 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1685 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1685) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 3)) 0)) is different from false [2021-12-28 05:46:03,030 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1685 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1685) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 4)) 0)) is different from false [2021-12-28 05:46:03,041 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1685 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1685) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 5)) 0)) is different from false [2021-12-28 05:46:03,050 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1685 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1685) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 6)) 0)) is different from false [2021-12-28 05:46:03,060 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1685 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1685) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ 7 |c_ULTIMATE.start_cstrcpy_~from#1.offset|)) 0)) is different from false [2021-12-28 05:46:03,070 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1685 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1685) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 8)) 0)) is different from false [2021-12-28 05:46:03,079 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1685 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1685) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 9)) 0)) is different from false [2021-12-28 05:46:03,089 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1685 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_cstrcpy_~to#1.base| v_ArrVal_1685) |c_ULTIMATE.start_cstrcpy_~from#1.base|) (+ |c_ULTIMATE.start_cstrcpy_~from#1.offset| 10)) 0)) is different from false [2021-12-28 05:46:03,099 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1685 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1685) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ |c_ULTIMATE.start_main_~nondetString~0#1.offset| 10)) 0)) is different from false [2021-12-28 05:46:03,103 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:03,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:46:03,109 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:03,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:46:03,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-28 05:46:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 21 proven. 191 refuted. 0 times theorem prover too weak. 0 trivial. 209 not checked. [2021-12-28 05:46:03,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603073019] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-28 05:46:03,536 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-28 05:46:03,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 29] total 57 [2021-12-28 05:46:03,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950789295] [2021-12-28 05:46:03,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-28 05:46:03,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-12-28 05:46:03,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 05:46:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-12-28 05:46:03,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1962, Unknown=11, NotChecked=1078, Total=3192 [2021-12-28 05:46:03,537 INFO L87 Difference]: Start difference. First operand 120 states and 127 transitions. Second operand has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 57 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:05,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 05:46:05,010 INFO L93 Difference]: Finished difference Result 172 states and 179 transitions. [2021-12-28 05:46:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-28 05:46:05,010 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 57 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2021-12-28 05:46:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 05:46:05,011 INFO L225 Difference]: With dead ends: 172 [2021-12-28 05:46:05,011 INFO L226 Difference]: Without dead ends: 127 [2021-12-28 05:46:05,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 158 SyntacticMatches, 10 SemanticMatches, 79 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=336, Invalid=4527, Unknown=11, NotChecked=1606, Total=6480 [2021-12-28 05:46:05,012 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 103 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 1920 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 3048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1059 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-28 05:46:05,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 842 Invalid, 3048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1920 Invalid, 0 Unknown, 1059 Unchecked, 0.6s Time] [2021-12-28 05:46:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-28 05:46:05,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2021-12-28 05:46:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 122 states have (on average 1.0737704918032787) internal successors, (131), 123 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2021-12-28 05:46:05,014 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 93 [2021-12-28 05:46:05,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 05:46:05,014 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2021-12-28 05:46:05,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.2982456140350878) internal successors, (188), 57 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 05:46:05,014 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2021-12-28 05:46:05,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-28 05:46:05,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 05:46:05,015 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 05:46:05,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-12-28 05:46:05,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-12-28 05:46:05,219 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 5 more)] === [2021-12-28 05:46:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 05:46:05,220 INFO L85 PathProgramCache]: Analyzing trace with hash 46237638, now seen corresponding path program 16 times [2021-12-28 05:46:05,220 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 05:46:05,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210038816] [2021-12-28 05:46:05,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 05:46:05,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 05:46:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 05:46:05,611 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 153 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:05,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 05:46:05,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210038816] [2021-12-28 05:46:05,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210038816] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-28 05:46:05,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32783211] [2021-12-28 05:46:05,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-28 05:46:05,612 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 05:46:05,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 05:46:05,613 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) [2021-12-28 05:46:05,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-12-28 05:46:05,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-28 05:46:05,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-28 05:46:05,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 118 conjunts are in the unsatisfiable core [2021-12-28 05:46:05,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 05:46:05,802 INFO L387 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 [2021-12-28 05:46:05,806 INFO L387 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 [2021-12-28 05:46:06,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-12-28 05:46:06,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:46:06,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:46:06,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:46:06,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:46:06,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:46:06,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:46:07,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:46:07,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:46:07,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:46:07,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-28 05:46:07,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:07,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 19 [2021-12-28 05:46:07,549 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 200 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 05:46:07,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 05:46:08,556 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1802 (Array Int Int)) (|v_ULTIMATE.start_cstrcpy_~from#1.offset_303| Int)) (or (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~nondetArea~0#1.base| v_ArrVal_1802) |c_ULTIMATE.start_main_~nondetString~0#1.base|) (+ 10 |v_ULTIMATE.start_cstrcpy_~from#1.offset_303|)) 0) (< |c_ULTIMATE.start_main_~nondetString~0#1.offset| |v_ULTIMATE.start_cstrcpy_~from#1.offset_303|) (<= (+ 12 |v_ULTIMATE.start_cstrcpy_~from#1.offset_303|) (select |c_#length| |c_ULTIMATE.start_main_~nondetString~0#1.base|)) (not (<= 0 |v_ULTIMATE.start_cstrcpy_~from#1.offset_303|)))) is different from false [2021-12-28 05:46:08,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:08,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2021-12-28 05:46:08,569 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-28 05:46:08,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 37 [2021-12-28 05:46:08,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7