./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rew.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/AutomizerReach.xml -i ../sv-benchmarks/c/array-tiling/rew.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a4dbd52ad78119a422ea606f98f820bbe5495fb5a7cf8886c665da2d1f9b569e --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 21:14:16,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 21:14:16,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 21:14:16,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 21:14:16,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 21:14:16,345 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 21:14:16,348 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 21:14:16,350 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 21:14:16,351 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 21:14:16,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 21:14:16,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 21:14:16,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 21:14:16,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 21:14:16,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 21:14:16,363 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 21:14:16,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 21:14:16,364 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 21:14:16,365 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 21:14:16,366 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 21:14:16,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 21:14:16,369 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 21:14:16,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 21:14:16,370 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 21:14:16,371 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 21:14:16,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 21:14:16,374 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 21:14:16,374 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 21:14:16,374 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 21:14:16,375 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 21:14:16,376 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 21:14:16,376 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 21:14:16,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 21:14:16,377 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 21:14:16,378 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 21:14:16,379 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 21:14:16,379 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 21:14:16,380 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 21:14:16,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 21:14:16,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 21:14:16,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 21:14:16,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 21:14:16,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 21:14:16,383 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 21:14:16,401 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 21:14:16,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 21:14:16,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 21:14:16,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 21:14:16,403 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 21:14:16,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 21:14:16,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 21:14:16,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 21:14:16,404 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 21:14:16,404 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 21:14:16,404 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 21:14:16,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 21:14:16,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 21:14:16,405 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 21:14:16,405 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 21:14:16,405 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 21:14:16,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 21:14:16,406 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 21:14:16,406 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 21:14:16,406 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 21:14:16,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 21:14:16,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 21:14:16,407 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 21:14:16,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 21:14:16,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:14:16,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 21:14:16,408 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 21:14:16,408 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 21:14:16,408 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 21:14:16,408 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 21:14:16,408 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 21:14:16,408 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 21:14:16,409 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 21:14:16,409 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4dbd52ad78119a422ea606f98f820bbe5495fb5a7cf8886c665da2d1f9b569e [2022-07-20 21:14:16,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 21:14:16,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 21:14:16,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 21:14:16,675 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 21:14:16,675 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 21:14:16,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rew.c [2022-07-20 21:14:16,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2965c0032/54050d0465c6428bbe928f580f5d1919/FLAG4876dfffa [2022-07-20 21:14:17,140 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 21:14:17,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rew.c [2022-07-20 21:14:17,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2965c0032/54050d0465c6428bbe928f580f5d1919/FLAG4876dfffa [2022-07-20 21:14:17,544 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2965c0032/54050d0465c6428bbe928f580f5d1919 [2022-07-20 21:14:17,545 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 21:14:17,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 21:14:17,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 21:14:17,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 21:14:17,552 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 21:14:17,553 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:14:17" (1/1) ... [2022-07-20 21:14:17,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2468c058 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17, skipping insertion in model container [2022-07-20 21:14:17,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 09:14:17" (1/1) ... [2022-07-20 21:14:17,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 21:14:17,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 21:14:17,710 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rew.c[394,407] [2022-07-20 21:14:17,732 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:14:17,743 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 21:14:17,756 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rew.c[394,407] [2022-07-20 21:14:17,772 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 21:14:17,787 INFO L208 MainTranslator]: Completed translation [2022-07-20 21:14:17,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17 WrapperNode [2022-07-20 21:14:17,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 21:14:17,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 21:14:17,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 21:14:17,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 21:14:17,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17" (1/1) ... [2022-07-20 21:14:17,806 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17" (1/1) ... [2022-07-20 21:14:17,824 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2022-07-20 21:14:17,827 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 21:14:17,828 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 21:14:17,828 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 21:14:17,828 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 21:14:17,834 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17" (1/1) ... [2022-07-20 21:14:17,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17" (1/1) ... [2022-07-20 21:14:17,835 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17" (1/1) ... [2022-07-20 21:14:17,836 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17" (1/1) ... [2022-07-20 21:14:17,839 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17" (1/1) ... [2022-07-20 21:14:17,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17" (1/1) ... [2022-07-20 21:14:17,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17" (1/1) ... [2022-07-20 21:14:17,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 21:14:17,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 21:14:17,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 21:14:17,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 21:14:17,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17" (1/1) ... [2022-07-20 21:14:17,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 21:14:17,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:17,875 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-20 21:14:17,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-20 21:14:17,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 21:14:17,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 21:14:17,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 21:14:17,908 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 21:14:17,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 21:14:17,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 21:14:17,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 21:14:17,958 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 21:14:17,959 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 21:14:18,052 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 21:14:18,058 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 21:14:18,058 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-20 21:14:18,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:14:18 BoogieIcfgContainer [2022-07-20 21:14:18,060 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 21:14:18,062 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 21:14:18,062 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 21:14:18,065 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 21:14:18,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 09:14:17" (1/3) ... [2022-07-20 21:14:18,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d5ce0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:14:18, skipping insertion in model container [2022-07-20 21:14:18,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 09:14:17" (2/3) ... [2022-07-20 21:14:18,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17d5ce0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 09:14:18, skipping insertion in model container [2022-07-20 21:14:18,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 09:14:18" (3/3) ... [2022-07-20 21:14:18,068 INFO L111 eAbstractionObserver]: Analyzing ICFG rew.c [2022-07-20 21:14:18,081 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 21:14:18,082 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 21:14:18,122 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 21:14:18,129 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@77e43863, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@46c31ab1 [2022-07-20 21:14:18,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 21:14:18,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 21:14:18,139 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:18,139 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:18,140 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:18,145 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2022-07-20 21:14:18,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:18,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650167203] [2022-07-20 21:14:18,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:18,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:18,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:18,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:18,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:18,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650167203] [2022-07-20 21:14:18,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650167203] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:14:18,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:14:18,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 21:14:18,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405500242] [2022-07-20 21:14:18,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:14:18,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 21:14:18,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:18,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 21:14:18,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:14:18,355 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 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) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:18,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:18,372 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-07-20 21:14:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 21:14:18,374 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 21:14:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:18,382 INFO L225 Difference]: With dead ends: 29 [2022-07-20 21:14:18,382 INFO L226 Difference]: Without dead ends: 14 [2022-07-20 21:14:18,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 21:14:18,391 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:18,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:14:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-20 21:14:18,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-20 21:14:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-20 21:14:18,419 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-07-20 21:14:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:18,420 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-20 21:14:18,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:18,421 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-20 21:14:18,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-20 21:14:18,421 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:18,421 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:18,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 21:14:18,422 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:18,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:18,426 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2022-07-20 21:14:18,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:18,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459946630] [2022-07-20 21:14:18,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:18,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:18,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:18,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459946630] [2022-07-20 21:14:18,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459946630] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 21:14:18,554 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 21:14:18,554 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 21:14:18,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448500692] [2022-07-20 21:14:18,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 21:14:18,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 21:14:18,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:18,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 21:14:18,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:14:18,557 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:18,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:18,583 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-07-20 21:14:18,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 21:14:18,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-20 21:14:18,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:18,584 INFO L225 Difference]: With dead ends: 29 [2022-07-20 21:14:18,585 INFO L226 Difference]: Without dead ends: 18 [2022-07-20 21:14:18,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 21:14:18,586 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:18,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 21:14:18,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-20 21:14:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-07-20 21:14:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-20 21:14:18,596 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-07-20 21:14:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:18,597 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-20 21:14:18,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-20 21:14:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 21:14:18,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:18,599 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:18,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 21:14:18,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:18,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2022-07-20 21:14:18,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:18,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536384685] [2022-07-20 21:14:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:18,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:18,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:18,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:18,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536384685] [2022-07-20 21:14:18,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536384685] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:18,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659977028] [2022-07-20 21:14:18,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:18,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:18,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:18,684 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:14:18,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 21:14:18,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:18,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-20 21:14:18,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:18,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:18,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659977028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:18,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:18,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-20 21:14:18,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21761471] [2022-07-20 21:14:18,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:18,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 21:14:18,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:18,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 21:14:18,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-20 21:14:18,901 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:18,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:18,983 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-07-20 21:14:18,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-20 21:14:18,984 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-20 21:14:18,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:18,985 INFO L225 Difference]: With dead ends: 34 [2022-07-20 21:14:18,985 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 21:14:18,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-07-20 21:14:18,986 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:18,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:14:18,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 21:14:18,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-07-20 21:14:18,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:18,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-20 21:14:18,994 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-07-20 21:14:18,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:18,995 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-20 21:14:18,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:18,996 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-20 21:14:18,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 21:14:18,996 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:18,996 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:19,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 21:14:19,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:19,212 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:19,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2022-07-20 21:14:19,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:19,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447101629] [2022-07-20 21:14:19,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:19,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:19,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:19,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:19,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:19,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447101629] [2022-07-20 21:14:19,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447101629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:19,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142777739] [2022-07-20 21:14:19,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:19,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:19,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:19,528 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:14:19,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 21:14:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-20 21:14:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:19,691 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:14:19,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:14:19,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 21:14:19,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:14:19,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:19,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:24,032 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_23| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_23|)) (forall ((v_ArrVal_36 Int)) (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_23| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_36) |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2022-07-20 21:14:24,049 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-20 21:14:24,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2022-07-20 21:14:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-20 21:14:24,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142777739] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:24,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:24,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 18 [2022-07-20 21:14:24,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442442104] [2022-07-20 21:14:24,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:24,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 21:14:24,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:24,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 21:14:24,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=217, Unknown=1, NotChecked=30, Total=306 [2022-07-20 21:14:24,120 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:26,152 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= .cse0 0) (= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (= |c_ULTIMATE.start_main_~val2~0#1| 3) (forall ((|v_ULTIMATE.start_main_~i~0#1_23| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_23|)) (forall ((v_ArrVal_36 Int)) (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_23| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_36) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (= (+ (- 2) |c_ULTIMATE.start_main_~low~0#1|) 0) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) is different from false [2022-07-20 21:14:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:26,330 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-07-20 21:14:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 21:14:26,331 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-20 21:14:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:26,332 INFO L225 Difference]: With dead ends: 28 [2022-07-20 21:14:26,332 INFO L226 Difference]: Without dead ends: 26 [2022-07-20 21:14:26,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=101, Invalid=325, Unknown=2, NotChecked=78, Total=506 [2022-07-20 21:14:26,333 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:26,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 31 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 82 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-07-20 21:14:26,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-20 21:14:26,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-07-20 21:14:26,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:26,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-07-20 21:14:26,338 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-07-20 21:14:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:26,338 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-07-20 21:14:26,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-07-20 21:14:26,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 21:14:26,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:26,339 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:26,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-20 21:14:26,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-20 21:14:26,549 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:26,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:26,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2022-07-20 21:14:26,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:26,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023146867] [2022-07-20 21:14:26,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:26,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:26,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:26,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:26,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023146867] [2022-07-20 21:14:26,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023146867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:26,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303221958] [2022-07-20 21:14:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:26,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:26,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:26,774 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:14:26,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 21:14:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:26,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 21:14:26,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:26,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:14:27,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:14:27,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:27,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:27,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:14:27,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:14:27,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:27,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1303221958] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:27,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:27,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-07-20 21:14:27,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371280504] [2022-07-20 21:14:27,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:27,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 21:14:27,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:27,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 21:14:27,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:14:27,220 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:27,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:27,486 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-07-20 21:14:27,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:14:27,487 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 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) Word has length 20 [2022-07-20 21:14:27,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:27,488 INFO L225 Difference]: With dead ends: 51 [2022-07-20 21:14:27,488 INFO L226 Difference]: Without dead ends: 49 [2022-07-20 21:14:27,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:14:27,489 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 39 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:27,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 94 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:14:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-20 21:14:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 33. [2022-07-20 21:14:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:27,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-20 21:14:27,495 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2022-07-20 21:14:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:27,495 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-20 21:14:27,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.789473684210526) internal successors, (53), 19 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-20 21:14:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 21:14:27,496 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:27,496 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:27,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 21:14:27,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:27,697 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:27,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:27,697 INFO L85 PathProgramCache]: Analyzing trace with hash -255872648, now seen corresponding path program 2 times [2022-07-20 21:14:27,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:27,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300662021] [2022-07-20 21:14:27,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:27,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:27,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:27,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300662021] [2022-07-20 21:14:27,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300662021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:27,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568241746] [2022-07-20 21:14:27,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:14:27,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:27,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:27,931 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:14:27,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 21:14:27,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:14:27,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:27,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 21:14:27,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:28,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:14:28,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 21:14:28,183 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:14:28,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 21:14:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:28,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:44,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-07-20 21:14:44,538 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-07-20 21:14:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:44,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568241746] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:44,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:44,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 24 [2022-07-20 21:14:44,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922193590] [2022-07-20 21:14:44,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:44,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 21:14:44,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:44,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 21:14:44,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=461, Unknown=3, NotChecked=0, Total=552 [2022-07-20 21:14:44,638 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:44,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:44,946 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2022-07-20 21:14:44,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 21:14:44,947 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-20 21:14:44,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:44,948 INFO L225 Difference]: With dead ends: 70 [2022-07-20 21:14:44,948 INFO L226 Difference]: Without dead ends: 68 [2022-07-20 21:14:44,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=182, Invalid=871, Unknown=3, NotChecked=0, Total=1056 [2022-07-20 21:14:44,949 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 72 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:44,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 66 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 184 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-07-20 21:14:44,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-20 21:14:44,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 40. [2022-07-20 21:14:44,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2022-07-20 21:14:44,963 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 24 [2022-07-20 21:14:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:44,964 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2022-07-20 21:14:44,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:44,966 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2022-07-20 21:14:44,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 21:14:44,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:44,967 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:44,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 21:14:45,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:45,191 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:45,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:45,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 3 times [2022-07-20 21:14:45,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:45,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207930950] [2022-07-20 21:14:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:45,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:45,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:45,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207930950] [2022-07-20 21:14:45,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207930950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:45,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853370565] [2022-07-20 21:14:45,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:14:45,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:45,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:45,264 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:14:45,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 21:14:45,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 21:14:45,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:45,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-20 21:14:45,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:45,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:45,420 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:45,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853370565] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:14:45,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:14:45,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-20 21:14:45,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062543246] [2022-07-20 21:14:45,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:14:45,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-20 21:14:45,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:14:45,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-20 21:14:45,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-20 21:14:45,422 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-07-20 21:14:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:14:45,527 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-07-20 21:14:45,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 21:14:45,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) Word has length 24 [2022-07-20 21:14:45,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:14:45,529 INFO L225 Difference]: With dead ends: 85 [2022-07-20 21:14:45,530 INFO L226 Difference]: Without dead ends: 47 [2022-07-20 21:14:45,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:14:45,531 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:14:45,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 52 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:14:45,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-20 21:14:45,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-07-20 21:14:45,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:14:45,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-07-20 21:14:45,537 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2022-07-20 21:14:45,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:14:45,537 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-07-20 21:14:45,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-07-20 21:14:45,538 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-07-20 21:14:45,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 21:14:45,538 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:14:45,538 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:14:45,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-20 21:14:45,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:45,764 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:14:45,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:14:45,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1364521933, now seen corresponding path program 4 times [2022-07-20 21:14:45,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:14:45,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147222857] [2022-07-20 21:14:45,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:14:45,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:14:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:14:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:46,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:14:46,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147222857] [2022-07-20 21:14:46,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147222857] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:14:46,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46260204] [2022-07-20 21:14:46,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:14:46,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:14:46,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:14:46,121 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:14:46,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 21:14:46,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:14:46,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:14:46,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:14:46,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:14:46,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:14:46,332 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:14:46,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:14:46,349 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:14:46,350 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:14:46,399 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:14:46,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:14:46,485 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:14:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:14:46,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:14:59,718 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_136 Int) (v_ArrVal_133 Int) (|v_ULTIMATE.start_main_~i~0#1_57| Int) (v_ArrVal_138 Int)) (or (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_133) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_136)) (+ (* |v_ULTIMATE.start_main_~i~0#1_57| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_138) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_57|)))) is different from false [2022-07-20 21:15:01,755 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_58| Int)) (or (forall ((v_ArrVal_136 Int) (v_ArrVal_133 Int) (|v_ULTIMATE.start_main_~i~0#1_57| Int) (v_ArrVal_138 Int)) (or (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_58| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4 .cse0) v_ArrVal_133) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) v_ArrVal_136)) (+ (* |v_ULTIMATE.start_main_~i~0#1_57| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_138) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_58| 1) |v_ULTIMATE.start_main_~i~0#1_57|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_58|)))) is different from false [2022-07-20 21:15:01,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-07-20 21:15:01,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 790 treesize of output 782 [2022-07-20 21:15:02,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-07-20 21:15:02,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46260204] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:02,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:02,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 13] total 29 [2022-07-20 21:15:02,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752531240] [2022-07-20 21:15:02,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:02,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-20 21:15:02,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:02,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-20 21:15:02,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=586, Unknown=9, NotChecked=102, Total=812 [2022-07-20 21:15:02,170 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:04,212 WARN L833 $PredicateComparison]: unable to prove that (and (= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (forall ((|v_ULTIMATE.start_main_~i~0#1_58| Int)) (or (forall ((v_ArrVal_136 Int) (v_ArrVal_133 Int) (|v_ULTIMATE.start_main_~i~0#1_57| Int) (v_ArrVal_138 Int)) (or (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_58| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4 .cse0) v_ArrVal_133) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) v_ArrVal_136)) (+ (* |v_ULTIMATE.start_main_~i~0#1_57| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_138) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_58| 1) |v_ULTIMATE.start_main_~i~0#1_57|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_58|)))) (= |c_ULTIMATE.start_main_~val2~0#1| 3) (= |c_ULTIMATE.start_main_~low~0#1| 2) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~i~0#1| 1)) is different from false [2022-07-20 21:15:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:04,377 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-07-20 21:15:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 21:15:04,377 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 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) Word has length 28 [2022-07-20 21:15:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:04,378 INFO L225 Difference]: With dead ends: 48 [2022-07-20 21:15:04,378 INFO L226 Difference]: Without dead ends: 46 [2022-07-20 21:15:04,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=151, Invalid=721, Unknown=10, NotChecked=174, Total=1056 [2022-07-20 21:15:04,379 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:04,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 71 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 208 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2022-07-20 21:15:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-20 21:15:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-07-20 21:15:04,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:04,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-07-20 21:15:04,384 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2022-07-20 21:15:04,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:04,385 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-07-20 21:15:04,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.6551724137931036) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:04,385 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-07-20 21:15:04,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 21:15:04,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:04,386 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:04,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:04,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:04,604 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:04,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 5 times [2022-07-20 21:15:04,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:04,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359271562] [2022-07-20 21:15:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:04,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:04,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:04,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:04,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359271562] [2022-07-20 21:15:04,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359271562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:04,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635755211] [2022-07-20 21:15:04,808 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:15:04,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:04,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:04,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:04,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 21:15:04,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-20 21:15:04,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:04,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-20 21:15:04,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:04,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:15:05,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:05,116 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:05,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:05,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:15:05,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:15:05,346 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:05,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635755211] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:05,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:05,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-07-20 21:15:05,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258231854] [2022-07-20 21:15:05,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:05,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 21:15:05,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:05,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 21:15:05,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-07-20 21:15:05,348 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:05,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:05,672 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2022-07-20 21:15:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 21:15:05,672 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 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) Word has length 28 [2022-07-20 21:15:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:05,673 INFO L225 Difference]: With dead ends: 63 [2022-07-20 21:15:05,673 INFO L226 Difference]: Without dead ends: 61 [2022-07-20 21:15:05,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=178, Invalid=1082, Unknown=0, NotChecked=0, Total=1260 [2022-07-20 21:15:05,676 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:05,677 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 128 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 266 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-07-20 21:15:05,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-20 21:15:05,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 41. [2022-07-20 21:15:05,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-07-20 21:15:05,694 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 28 [2022-07-20 21:15:05,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:05,695 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-07-20 21:15:05,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 26 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:05,695 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-07-20 21:15:05,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 21:15:05,697 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:05,697 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:05,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:05,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:05,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:05,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:05,912 INFO L85 PathProgramCache]: Analyzing trace with hash 368564393, now seen corresponding path program 6 times [2022-07-20 21:15:05,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:05,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598437225] [2022-07-20 21:15:05,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:05,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:06,115 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:06,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:06,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598437225] [2022-07-20 21:15:06,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598437225] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:06,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35201544] [2022-07-20 21:15:06,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:15:06,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:06,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:06,118 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:06,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 21:15:06,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-20 21:15:06,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:06,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-20 21:15:06,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:06,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:15:06,335 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:15:06,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:15:06,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:06,481 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:06,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:14,660 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-07-20 21:15:14,664 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-07-20 21:15:14,813 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:14,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35201544] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:14,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:14,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 30 [2022-07-20 21:15:14,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269022251] [2022-07-20 21:15:14,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:14,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-20 21:15:14,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:14,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-20 21:15:14,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=758, Unknown=4, NotChecked=0, Total=870 [2022-07-20 21:15:14,815 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:15,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:15,215 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2022-07-20 21:15:15,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 21:15:15,216 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 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 32 [2022-07-20 21:15:15,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:15,216 INFO L225 Difference]: With dead ends: 58 [2022-07-20 21:15:15,216 INFO L226 Difference]: Without dead ends: 56 [2022-07-20 21:15:15,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=225, Invalid=1411, Unknown=4, NotChecked=0, Total=1640 [2022-07-20 21:15:15,218 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 79 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:15,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 124 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 353 Invalid, 0 Unknown, 13 Unchecked, 0.2s Time] [2022-07-20 21:15:15,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-07-20 21:15:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 33. [2022-07-20 21:15:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 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) [2022-07-20 21:15:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-07-20 21:15:15,231 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2022-07-20 21:15:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:15,231 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-07-20 21:15:15,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.966666666666667) internal successors, (89), 30 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-07-20 21:15:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 21:15:15,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:15,233 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:15,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:15,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 21:15:15,453 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:15,453 INFO L85 PathProgramCache]: Analyzing trace with hash 948898404, now seen corresponding path program 7 times [2022-07-20 21:15:15,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:15,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197125651] [2022-07-20 21:15:15,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:15,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:15,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:15,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197125651] [2022-07-20 21:15:15,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197125651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:15,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658202278] [2022-07-20 21:15:15,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:15:15,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:15,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:15,527 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:15,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 21:15:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:15,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 21:15:15,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:15,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:15,717 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:15,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658202278] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:15,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:15,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-20 21:15:15,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503051881] [2022-07-20 21:15:15,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:15,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 21:15:15,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:15,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 21:15:15,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-20 21:15:15,720 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:15,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:15,819 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2022-07-20 21:15:15,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 21:15:15,820 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 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) Word has length 32 [2022-07-20 21:15:15,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:15,820 INFO L225 Difference]: With dead ends: 64 [2022-07-20 21:15:15,820 INFO L226 Difference]: Without dead ends: 41 [2022-07-20 21:15:15,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-07-20 21:15:15,821 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:15,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 49 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:15,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-20 21:15:15,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-07-20 21:15:15,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:15,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-07-20 21:15:15,825 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2022-07-20 21:15:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:15,825 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-07-20 21:15:15,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-07-20 21:15:15,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-20 21:15:15,826 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:15,826 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:15,852 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:16,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:16,045 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:16,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:16,046 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 8 times [2022-07-20 21:15:16,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:16,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423304536] [2022-07-20 21:15:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:16,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:16,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:16,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423304536] [2022-07-20 21:15:16,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423304536] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:16,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840087949] [2022-07-20 21:15:16,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:15:16,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:16,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:16,317 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:16,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 21:15:16,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:15:16,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:16,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:15:16,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:16,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:15:16,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:16,664 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:16,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:16,784 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:15:16,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:15:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:16,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840087949] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:16,936 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:16,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 31 [2022-07-20 21:15:16,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662927715] [2022-07-20 21:15:16,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:16,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-20 21:15:16,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:16,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-20 21:15:16,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=823, Unknown=0, NotChecked=0, Total=930 [2022-07-20 21:15:16,938 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:17,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:17,303 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2022-07-20 21:15:17,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 21:15:17,303 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-20 21:15:17,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:17,304 INFO L225 Difference]: With dead ends: 75 [2022-07-20 21:15:17,304 INFO L226 Difference]: Without dead ends: 73 [2022-07-20 21:15:17,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=1519, Unknown=0, NotChecked=0, Total=1722 [2022-07-20 21:15:17,305 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:17,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 181 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 365 Invalid, 0 Unknown, 127 Unchecked, 0.2s Time] [2022-07-20 21:15:17,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-20 21:15:17,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2022-07-20 21:15:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-07-20 21:15:17,311 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 36 [2022-07-20 21:15:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:17,312 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-07-20 21:15:17,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-07-20 21:15:17,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 21:15:17,314 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:17,314 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:17,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:17,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 21:15:17,520 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:17,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1209559974, now seen corresponding path program 9 times [2022-07-20 21:15:17,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:17,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240664904] [2022-07-20 21:15:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:17,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:17,782 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:17,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:17,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240664904] [2022-07-20 21:15:17,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240664904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:17,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482761320] [2022-07-20 21:15:17,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:15:17,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:17,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:17,788 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:17,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 21:15:17,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-20 21:15:17,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:17,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-20 21:15:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:17,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:15:18,037 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:15:18,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2022-07-20 21:15:18,213 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:18,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:21,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-07-20 21:15:21,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-07-20 21:15:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:21,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482761320] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:21,762 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:21,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-07-20 21:15:21,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904896880] [2022-07-20 21:15:21,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:21,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-20 21:15:21,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:21,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-20 21:15:21,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1055, Unknown=8, NotChecked=0, Total=1190 [2022-07-20 21:15:21,764 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:22,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:22,491 INFO L93 Difference]: Finished difference Result 99 states and 102 transitions. [2022-07-20 21:15:22,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-20 21:15:22,491 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-20 21:15:22,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:22,492 INFO L225 Difference]: With dead ends: 99 [2022-07-20 21:15:22,492 INFO L226 Difference]: Without dead ends: 97 [2022-07-20 21:15:22,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=406, Invalid=2778, Unknown=8, NotChecked=0, Total=3192 [2022-07-20 21:15:22,493 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 163 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:22,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 188 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 445 Invalid, 0 Unknown, 163 Unchecked, 0.2s Time] [2022-07-20 21:15:22,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-07-20 21:15:22,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 53. [2022-07-20 21:15:22,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-07-20 21:15:22,501 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 40 [2022-07-20 21:15:22,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:22,501 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-07-20 21:15:22,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2285714285714286) internal successors, (113), 35 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:22,501 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-07-20 21:15:22,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-20 21:15:22,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:22,502 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:22,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 21:15:22,715 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 10 times [2022-07-20 21:15:22,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:22,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803703905] [2022-07-20 21:15:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:22,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:22,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:22,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803703905] [2022-07-20 21:15:22,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803703905] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:22,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619194118] [2022-07-20 21:15:22,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:15:22,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:22,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:22,808 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:22,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 21:15:22,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:15:22,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:22,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 21:15:22,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:22,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:15:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:23,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619194118] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:15:23,037 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:15:23,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2022-07-20 21:15:23,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825835329] [2022-07-20 21:15:23,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:15:23,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 21:15:23,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:15:23,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 21:15:23,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-20 21:15:23,039 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:15:23,180 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-07-20 21:15:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 21:15:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-20 21:15:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:15:23,181 INFO L225 Difference]: With dead ends: 98 [2022-07-20 21:15:23,181 INFO L226 Difference]: Without dead ends: 71 [2022-07-20 21:15:23,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2022-07-20 21:15:23,182 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:15:23,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 74 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 21:15:23,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-20 21:15:23,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2022-07-20 21:15:23,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 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) [2022-07-20 21:15:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-07-20 21:15:23,189 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 40 [2022-07-20 21:15:23,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:15:23,189 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-07-20 21:15:23,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:15:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-07-20 21:15:23,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 21:15:23,190 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:15:23,190 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:15:23,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 21:15:23,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-20 21:15:23,414 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:15:23,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:15:23,415 INFO L85 PathProgramCache]: Analyzing trace with hash -470542059, now seen corresponding path program 11 times [2022-07-20 21:15:23,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:15:23,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222140614] [2022-07-20 21:15:23,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:15:23,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:15:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:15:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:23,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:15:23,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222140614] [2022-07-20 21:15:23,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222140614] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:15:23,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783288221] [2022-07-20 21:15:23,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:15:23,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:15:23,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:15:23,724 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:15:23,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 21:15:23,817 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-20 21:15:23,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:15:23,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 21:15:23,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:15:23,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:15:23,985 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:15:23,985 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:15:24,000 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:15:24,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:15:24,039 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:15:24,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:15:24,185 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:15:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:15:24,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:00,605 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_161| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_161|)) (forall ((v_ArrVal_387 Int) (v_ArrVal_385 Int) (|v_ULTIMATE.start_main_~i~0#1_160| Int) (v_ArrVal_390 Int)) (or (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_161| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_385) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_387)) (+ (* |v_ULTIMATE.start_main_~i~0#1_160| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_390) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_161| 1) |v_ULTIMATE.start_main_~i~0#1_160|)))))) is different from false [2022-07-20 21:16:00,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-07-20 21:16:00,619 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 386 treesize of output 382 [2022-07-20 21:16:00,822 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-07-20 21:16:00,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783288221] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:00,823 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:00,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 17] total 41 [2022-07-20 21:16:00,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632689632] [2022-07-20 21:16:00,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:00,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-20 21:16:00,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:00,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-20 21:16:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1359, Unknown=32, NotChecked=76, Total=1640 [2022-07-20 21:16:00,825 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 41 states, 41 states have (on average 3.048780487804878) internal successors, (125), 41 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) [2022-07-20 21:16:02,980 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0)) (= |c_ULTIMATE.start_main_~val2~0#1| 3) (forall ((|v_ULTIMATE.start_main_~i~0#1_161| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_161|)) (forall ((v_ArrVal_387 Int) (v_ArrVal_385 Int) (|v_ULTIMATE.start_main_~i~0#1_160| Int) (v_ArrVal_390 Int)) (or (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_161| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_385) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_387)) (+ (* |v_ULTIMATE.start_main_~i~0#1_160| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_390) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_161| 1) |v_ULTIMATE.start_main_~i~0#1_160|)))))) (= |c_ULTIMATE.start_main_~low~0#1| 2) (= .cse0 12) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) is different from false [2022-07-20 21:16:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:03,328 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2022-07-20 21:16:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-20 21:16:03,328 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.048780487804878) internal successors, (125), 41 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) Word has length 44 [2022-07-20 21:16:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:03,329 INFO L225 Difference]: With dead ends: 72 [2022-07-20 21:16:03,329 INFO L226 Difference]: Without dead ends: 70 [2022-07-20 21:16:03,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 39.0s TimeCoverageRelationStatistics Valid=282, Invalid=2243, Unknown=33, NotChecked=198, Total=2756 [2022-07-20 21:16:03,330 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 324 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:03,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 195 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 550 Invalid, 0 Unknown, 324 Unchecked, 0.2s Time] [2022-07-20 21:16:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-20 21:16:03,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2022-07-20 21:16:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:16:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-07-20 21:16:03,335 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2022-07-20 21:16:03,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:03,336 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-07-20 21:16:03,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.048780487804878) internal successors, (125), 41 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) [2022-07-20 21:16:03,336 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-07-20 21:16:03,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-20 21:16:03,336 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:03,337 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:03,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:03,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-20 21:16:03,537 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:03,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:03,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 12 times [2022-07-20 21:16:03,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:03,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169312675] [2022-07-20 21:16:03,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:03,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:03,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:03,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:03,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169312675] [2022-07-20 21:16:03,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169312675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:03,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113233957] [2022-07-20 21:16:03,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:16:03,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:03,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:03,731 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:16:03,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 21:16:03,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-20 21:16:03,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:03,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-20 21:16:03,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:03,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:16:04,286 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:16:04,286 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-20 21:16:04,317 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 28 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:04,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:04,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-20 21:16:04,636 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-20 21:16:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 24 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:04,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113233957] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:04,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:04,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 40 [2022-07-20 21:16:04,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374400122] [2022-07-20 21:16:04,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:04,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-20 21:16:04,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:04,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-20 21:16:04,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 21:16:04,944 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 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) [2022-07-20 21:16:05,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:05,477 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2022-07-20 21:16:05,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-20 21:16:05,478 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 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) Word has length 44 [2022-07-20 21:16:05,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:05,478 INFO L225 Difference]: With dead ends: 81 [2022-07-20 21:16:05,478 INFO L226 Difference]: Without dead ends: 54 [2022-07-20 21:16:05,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=382, Invalid=2480, Unknown=0, NotChecked=0, Total=2862 [2022-07-20 21:16:05,479 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 36 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:05,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 175 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 338 Invalid, 0 Unknown, 66 Unchecked, 0.1s Time] [2022-07-20 21:16:05,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-07-20 21:16:05,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-07-20 21:16:05,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:16:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-07-20 21:16:05,486 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-07-20 21:16:05,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:05,487 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-07-20 21:16:05,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.125) internal successors, (125), 40 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) [2022-07-20 21:16:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-07-20 21:16:05,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-20 21:16:05,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:05,488 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:05,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:05,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:05,695 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:05,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:05,696 INFO L85 PathProgramCache]: Analyzing trace with hash 877372555, now seen corresponding path program 13 times [2022-07-20 21:16:05,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:05,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698982936] [2022-07-20 21:16:05,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:05,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:05,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:05,966 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:05,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:05,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698982936] [2022-07-20 21:16:05,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698982936] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:05,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343303198] [2022-07-20 21:16:05,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 21:16:05,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:05,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:05,972 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:16:05,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 21:16:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:06,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-20 21:16:06,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:06,179 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:16:06,239 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:16:06,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:16:06,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:16:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:06,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:16:32,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-07-20 21:16:32,706 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-07-20 21:16:32,900 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:32,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343303198] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:16:32,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:16:32,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 42 [2022-07-20 21:16:32,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860251443] [2022-07-20 21:16:32,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:16:32,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-20 21:16:32,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:16:32,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-20 21:16:32,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1565, Unknown=10, NotChecked=0, Total=1722 [2022-07-20 21:16:32,902 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:16:33,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:16:33,678 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-07-20 21:16:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 21:16:33,679 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-20 21:16:33,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:16:33,679 INFO L225 Difference]: With dead ends: 96 [2022-07-20 21:16:33,680 INFO L226 Difference]: Without dead ends: 94 [2022-07-20 21:16:33,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=334, Invalid=3196, Unknown=10, NotChecked=0, Total=3540 [2022-07-20 21:16:33,681 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 21:16:33,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 260 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 768 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-07-20 21:16:33,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-20 21:16:33,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 61. [2022-07-20 21:16:33,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:16:33,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-07-20 21:16:33,691 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 48 [2022-07-20 21:16:33,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:16:33,692 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-07-20 21:16:33,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.261904761904762) internal successors, (137), 42 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:16:33,692 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-07-20 21:16:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 21:16:33,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:16:33,700 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:16:33,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 21:16:33,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-20 21:16:33,920 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:16:33,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:16:33,920 INFO L85 PathProgramCache]: Analyzing trace with hash 730938950, now seen corresponding path program 14 times [2022-07-20 21:16:33,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:16:33,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651598805] [2022-07-20 21:16:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:16:33,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:16:33,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:16:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:34,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:16:34,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651598805] [2022-07-20 21:16:34,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651598805] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:16:34,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462419289] [2022-07-20 21:16:34,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 21:16:34,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:16:34,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:16:34,242 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:16:34,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 21:16:34,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 21:16:34,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:16:34,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:16:34,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:16:34,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:16:34,517 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-20 21:16:34,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-20 21:16:34,528 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:16:34,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:16:34,570 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:16:34,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:16:34,772 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:16:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:16:34,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:17:29,941 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_223| Int) (v_ArrVal_548 Int) (v_ArrVal_547 Int) (v_ArrVal_545 Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_223|)) (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_545) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_547)) (+ (* |v_ULTIMATE.start_main_~i~0#1_223| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_548) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2022-07-20 21:17:58,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-07-20 21:17:58,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 386 treesize of output 382 [2022-07-20 21:17:58,314 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 109 refuted. 1 times theorem prover too weak. 0 trivial. 13 not checked. [2022-07-20 21:17:58,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462419289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:17:58,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:17:58,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 19] total 47 [2022-07-20 21:17:58,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913792672] [2022-07-20 21:17:58,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:17:58,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-20 21:17:58,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:17:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-20 21:17:58,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1845, Unknown=45, NotChecked=88, Total=2162 [2022-07-20 21:17:58,316 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 47 states, 47 states have (on average 3.1702127659574466) internal successors, (149), 47 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:18:03,004 INFO L93 Difference]: Finished difference Result 84 states and 86 transitions. [2022-07-20 21:18:03,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-20 21:18:03,005 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.1702127659574466) internal successors, (149), 47 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-20 21:18:03,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:18:03,005 INFO L225 Difference]: With dead ends: 84 [2022-07-20 21:18:03,005 INFO L226 Difference]: Without dead ends: 82 [2022-07-20 21:18:03,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 73 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 88.2s TimeCoverageRelationStatistics Valid=334, Invalid=3283, Unknown=47, NotChecked=118, Total=3782 [2022-07-20 21:18:03,007 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:18:03,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 229 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 540 Invalid, 0 Unknown, 333 Unchecked, 0.2s Time] [2022-07-20 21:18:03,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-20 21:18:03,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2022-07-20 21:18:03,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-07-20 21:18:03,026 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2022-07-20 21:18:03,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:18:03,027 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-07-20 21:18:03,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.1702127659574466) internal successors, (149), 47 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:03,028 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-07-20 21:18:03,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-20 21:18:03,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:18:03,029 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:18:03,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-20 21:18:03,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 21:18:03,240 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:18:03,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:18:03,240 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 15 times [2022-07-20 21:18:03,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:18:03,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674680278] [2022-07-20 21:18:03,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:18:03,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:18:03,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:18:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:03,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:18:03,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674680278] [2022-07-20 21:18:03,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674680278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:18:03,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746389928] [2022-07-20 21:18:03,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 21:18:03,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:18:03,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:18:03,462 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:18:03,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 21:18:03,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-20 21:18:03,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:18:03,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-20 21:18:03,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:18:03,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:18:04,176 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-20 21:18:04,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-20 21:18:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 45 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:04,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:18:04,615 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-20 21:18:04,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-20 21:18:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 40 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:04,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746389928] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:18:04,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:18:04,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 46 [2022-07-20 21:18:04,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568174650] [2022-07-20 21:18:04,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:18:04,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-20 21:18:04,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:18:04,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-20 21:18:04,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1810, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 21:18:04,951 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:05,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:18:05,734 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2022-07-20 21:18:05,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-20 21:18:05,735 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-20 21:18:05,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:18:05,735 INFO L225 Difference]: With dead ends: 93 [2022-07-20 21:18:05,735 INFO L226 Difference]: Without dead ends: 62 [2022-07-20 21:18:05,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=548, Invalid=3874, Unknown=0, NotChecked=0, Total=4422 [2022-07-20 21:18:05,737 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 21:18:05,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 304 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 514 Invalid, 0 Unknown, 131 Unchecked, 0.2s Time] [2022-07-20 21:18:05,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-20 21:18:05,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-07-20 21:18:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:05,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-07-20 21:18:05,744 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2022-07-20 21:18:05,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:18:05,744 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-07-20 21:18:05,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.239130434782609) internal successors, (149), 46 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:05,745 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-07-20 21:18:05,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-20 21:18:05,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:18:05,745 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:18:05,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 21:18:05,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:18:05,946 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:18:05,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:18:05,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1904265532, now seen corresponding path program 16 times [2022-07-20 21:18:05,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:18:05,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722503884] [2022-07-20 21:18:05,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:18:05,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:18:05,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:18:06,202 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:06,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:18:06,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722503884] [2022-07-20 21:18:06,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722503884] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:18:06,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059222753] [2022-07-20 21:18:06,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 21:18:06,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:18:06,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:18:06,204 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:18:06,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 21:18:06,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 21:18:06,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:18:06,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 21:18:06,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:18:06,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:18:06,518 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:18:06,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:18:06,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:18:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:06,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:18:33,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-07-20 21:18:33,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 178 [2022-07-20 21:18:33,323 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:33,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059222753] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:18:33,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:18:33,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 18] total 48 [2022-07-20 21:18:33,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961259182] [2022-07-20 21:18:33,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:18:33,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-20 21:18:33,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:18:33,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-20 21:18:33,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2075, Unknown=13, NotChecked=0, Total=2256 [2022-07-20 21:18:33,325 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 48 states, 48 states have (on average 3.3541666666666665) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:34,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:18:34,418 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2022-07-20 21:18:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-20 21:18:34,418 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.3541666666666665) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-20 21:18:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:18:34,419 INFO L225 Difference]: With dead ends: 68 [2022-07-20 21:18:34,419 INFO L226 Difference]: Without dead ends: 66 [2022-07-20 21:18:34,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 81 SyntacticMatches, 6 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=372, Invalid=4171, Unknown=13, NotChecked=0, Total=4556 [2022-07-20 21:18:34,421 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:18:34,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 392 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1252 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2022-07-20 21:18:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-20 21:18:34,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-07-20 21:18:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:34,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-07-20 21:18:34,430 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-07-20 21:18:34,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:18:34,430 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-07-20 21:18:34,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.3541666666666665) internal successors, (161), 48 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:34,430 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-07-20 21:18:34,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-20 21:18:34,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:18:34,431 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:18:34,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-20 21:18:34,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:18:34,640 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:18:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:18:34,640 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 17 times [2022-07-20 21:18:34,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:18:34,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146601084] [2022-07-20 21:18:34,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:18:34,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:18:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:18:34,934 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:34,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:18:34,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146601084] [2022-07-20 21:18:34,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146601084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:18:34,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3609874] [2022-07-20 21:18:34,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 21:18:34,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:18:34,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:18:34,937 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:18:34,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 21:18:35,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-20 21:18:35,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:18:35,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 21:18:35,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:18:35,305 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 21:18:35,593 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-20 21:18:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:35,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:18:35,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-20 21:18:35,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-20 21:18:36,147 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:36,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3609874] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:18:36,148 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:18:36,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 50 [2022-07-20 21:18:36,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033498119] [2022-07-20 21:18:36,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:18:36,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-20 21:18:36,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:18:36,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-20 21:18:36,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2290, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 21:18:36,149 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:37,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 21:18:37,261 INFO L93 Difference]: Finished difference Result 111 states and 114 transitions. [2022-07-20 21:18:37,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-20 21:18:37,261 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 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 60 [2022-07-20 21:18:37,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 21:18:37,262 INFO L225 Difference]: With dead ends: 111 [2022-07-20 21:18:37,262 INFO L226 Difference]: Without dead ends: 109 [2022-07-20 21:18:37,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=358, Invalid=4754, Unknown=0, NotChecked=0, Total=5112 [2022-07-20 21:18:37,264 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 36 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 333 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 21:18:37,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 529 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1253 Invalid, 0 Unknown, 333 Unchecked, 0.5s Time] [2022-07-20 21:18:37,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-20 21:18:37,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2022-07-20 21:18:37,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:37,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-07-20 21:18:37,277 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 60 [2022-07-20 21:18:37,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 21:18:37,278 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-07-20 21:18:37,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.46) internal successors, (173), 50 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:37,278 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-07-20 21:18:37,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-20 21:18:37,278 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 21:18:37,279 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 21:18:37,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-20 21:18:37,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:18:37,488 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 21:18:37,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 21:18:37,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1903967635, now seen corresponding path program 18 times [2022-07-20 21:18:37,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 21:18:37,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990525017] [2022-07-20 21:18:37,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 21:18:37,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 21:18:37,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 21:18:37,808 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:37,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 21:18:37,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990525017] [2022-07-20 21:18:37,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990525017] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 21:18:37,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739981646] [2022-07-20 21:18:37,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 21:18:37,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 21:18:37,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 21:18:37,810 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 21:18:37,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 21:18:37,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-20 21:18:37,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 21:18:37,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-20 21:18:37,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 21:18:38,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 21:18:38,280 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-20 21:18:38,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-20 21:18:38,740 INFO L356 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2022-07-20 21:18:38,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2022-07-20 21:18:38,783 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:38,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 21:18:48,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2022-07-20 21:18:48,746 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 78 [2022-07-20 21:18:49,053 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 21:18:49,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739981646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 21:18:49,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 21:18:49,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 55 [2022-07-20 21:18:49,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821115934] [2022-07-20 21:18:49,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 21:18:49,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-20 21:18:49,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 21:18:49,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-20 21:18:49,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2760, Unknown=20, NotChecked=0, Total=2970 [2022-07-20 21:18:49,055 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 55 states, 55 states have (on average 3.3636363636363638) internal successors, (185), 55 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 21:18:50,562 WARN L833 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~val2~0#1| 3) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (= (+ (- 2) |c_ULTIMATE.start_main_~low~0#1|) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_328| Int)) (or (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_328| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) |c_ULTIMATE.start_main_~val2~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_328|))))) is different from false [2022-07-20 21:18:51,335 WARN L833 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~low~0#1| 2) (= |c_ULTIMATE.start_main_~val2~0#1| 3) (= |c_ULTIMATE.start_main_~i~0#1| 0) (= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (exists ((|ULTIMATE.start_main_~i~0#1| Int)) (and (<= 7 |ULTIMATE.start_main_~i~0#1|) (= 3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (= (+ (- 2) |c_ULTIMATE.start_main_~low~0#1|) 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_328| Int)) (or (<= |c_ULTIMATE.start_main_~low~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_328| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) |c_ULTIMATE.start_main_~val2~0#1|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 24))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_328|))))) is different from false