./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/brs5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/brs5.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 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 11:00:13,333 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 11:00:13,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 11:00:13,396 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 11:00:13,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 11:00:13,398 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 11:00:13,400 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 11:00:13,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 11:00:13,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 11:00:13,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 11:00:13,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 11:00:13,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 11:00:13,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 11:00:13,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 11:00:13,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 11:00:13,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 11:00:13,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 11:00:13,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 11:00:13,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 11:00:13,425 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 11:00:13,428 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 11:00:13,429 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 11:00:13,429 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 11:00:13,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 11:00:13,432 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 11:00:13,435 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 11:00:13,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 11:00:13,435 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 11:00:13,436 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 11:00:13,436 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 11:00:13,437 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 11:00:13,438 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 11:00:13,439 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 11:00:13,439 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 11:00:13,440 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 11:00:13,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 11:00:13,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 11:00:13,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 11:00:13,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 11:00:13,441 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 11:00:13,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 11:00:13,443 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 11:00:13,444 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 11:00:13,475 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 11:00:13,475 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 11:00:13,475 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 11:00:13,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 11:00:13,476 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 11:00:13,476 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 11:00:13,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 11:00:13,477 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 11:00:13,477 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 11:00:13,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 11:00:13,478 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 11:00:13,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 11:00:13,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 11:00:13,478 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 11:00:13,478 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 11:00:13,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 11:00:13,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 11:00:13,479 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 11:00:13,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 11:00:13,480 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 11:00:13,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 11:00:13,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 11:00:13,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 11:00:13,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 11:00:13,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:00:13,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 11:00:13,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 11:00:13,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 11:00:13,481 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 11:00:13,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 11:00:13,482 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 11:00:13,482 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 11:00:13,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 11:00:13,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 908db381a067cd65920e47aeaa3ff4913a67de2048af6864f01f76e8ca691571 [2022-07-13 11:00:13,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 11:00:13,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 11:00:13,710 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 11:00:13,711 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 11:00:13,712 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 11:00:13,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/brs5.c [2022-07-13 11:00:13,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e597740e/ab79fb7875c14f7799bbfe210d97faad/FLAG98fdf54ec [2022-07-13 11:00:14,136 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 11:00:14,137 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/brs5.c [2022-07-13 11:00:14,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e597740e/ab79fb7875c14f7799bbfe210d97faad/FLAG98fdf54ec [2022-07-13 11:00:14,162 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e597740e/ab79fb7875c14f7799bbfe210d97faad [2022-07-13 11:00:14,164 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 11:00:14,165 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 11:00:14,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 11:00:14,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 11:00:14,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 11:00:14,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:00:14" (1/1) ... [2022-07-13 11:00:14,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@211febb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14, skipping insertion in model container [2022-07-13 11:00:14,170 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 11:00:14" (1/1) ... [2022-07-13 11:00:14,175 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 11:00:14,185 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 11:00:14,339 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-fpi/brs5.c[587,600] [2022-07-13 11:00:14,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:00:14,362 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 11:00:14,375 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-fpi/brs5.c[587,600] [2022-07-13 11:00:14,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 11:00:14,400 INFO L208 MainTranslator]: Completed translation [2022-07-13 11:00:14,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14 WrapperNode [2022-07-13 11:00:14,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 11:00:14,402 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 11:00:14,402 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 11:00:14,403 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 11:00:14,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14" (1/1) ... [2022-07-13 11:00:14,414 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14" (1/1) ... [2022-07-13 11:00:14,436 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2022-07-13 11:00:14,437 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 11:00:14,437 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 11:00:14,437 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 11:00:14,437 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 11:00:14,443 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14" (1/1) ... [2022-07-13 11:00:14,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14" (1/1) ... [2022-07-13 11:00:14,447 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14" (1/1) ... [2022-07-13 11:00:14,447 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14" (1/1) ... [2022-07-13 11:00:14,464 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14" (1/1) ... [2022-07-13 11:00:14,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14" (1/1) ... [2022-07-13 11:00:14,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14" (1/1) ... [2022-07-13 11:00:14,477 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 11:00:14,478 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 11:00:14,479 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 11:00:14,479 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 11:00:14,480 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14" (1/1) ... [2022-07-13 11:00:14,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 11:00:14,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:00:14,503 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) [2022-07-13 11:00:14,511 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 [2022-07-13 11:00:14,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 11:00:14,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 11:00:14,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 11:00:14,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 11:00:14,528 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 11:00:14,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 11:00:14,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 11:00:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 11:00:14,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 11:00:14,581 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 11:00:14,582 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 11:00:14,806 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 11:00:14,810 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 11:00:14,810 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 11:00:14,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:00:14 BoogieIcfgContainer [2022-07-13 11:00:14,811 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 11:00:14,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 11:00:14,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 11:00:14,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 11:00:14,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 11:00:14" (1/3) ... [2022-07-13 11:00:14,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652a06cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:00:14, skipping insertion in model container [2022-07-13 11:00:14,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 11:00:14" (2/3) ... [2022-07-13 11:00:14,816 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@652a06cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 11:00:14, skipping insertion in model container [2022-07-13 11:00:14,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 11:00:14" (3/3) ... [2022-07-13 11:00:14,817 INFO L111 eAbstractionObserver]: Analyzing ICFG brs5.c [2022-07-13 11:00:14,827 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 11:00:14,828 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 11:00:14,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 11:00:14,870 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@4e631a75, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e6d6098 [2022-07-13 11:00:14,870 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 11:00:14,874 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:14,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 11:00:14,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:00:14,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:00:14,880 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:00:14,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:00:14,885 INFO L85 PathProgramCache]: Analyzing trace with hash 361760665, now seen corresponding path program 1 times [2022-07-13 11:00:14,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:00:14,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660792944] [2022-07-13 11:00:14,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:00:14,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:00:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:00:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:15,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:00:15,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660792944] [2022-07-13 11:00:15,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660792944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:00:15,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:00:15,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 11:00:15,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019980367] [2022-07-13 11:00:15,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:00:15,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 11:00:15,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:00:15,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 11:00:15,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 11:00:15,068 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:15,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:00:15,079 INFO L93 Difference]: Finished difference Result 36 states and 50 transitions. [2022-07-13 11:00:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 11:00:15,081 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 11:00:15,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:00:15,085 INFO L225 Difference]: With dead ends: 36 [2022-07-13 11:00:15,086 INFO L226 Difference]: Without dead ends: 16 [2022-07-13 11:00:15,088 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 [2022-07-13 11:00:15,092 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2022-07-13 11:00:15,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:00:15,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-13 11:00:15,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-13 11:00:15,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:15,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-07-13 11:00:15,118 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2022-07-13 11:00:15,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:00:15,119 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-07-13 11:00:15,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-07-13 11:00:15,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 11:00:15,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:00:15,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:00:15,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 11:00:15,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:00:15,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:00:15,122 INFO L85 PathProgramCache]: Analyzing trace with hash -447913662, now seen corresponding path program 1 times [2022-07-13 11:00:15,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:00:15,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093149891] [2022-07-13 11:00:15,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:00:15,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:00:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:00:15,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:15,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:00:15,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093149891] [2022-07-13 11:00:15,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093149891] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:00:15,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:00:15,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 11:00:15,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991525593] [2022-07-13 11:00:15,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:00:15,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 11:00:15,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:00:15,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 11:00:15,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:00:15,207 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:15,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:00:15,280 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2022-07-13 11:00:15,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 11:00:15,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-13 11:00:15,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:00:15,281 INFO L225 Difference]: With dead ends: 33 [2022-07-13 11:00:15,281 INFO L226 Difference]: Without dead ends: 22 [2022-07-13 11:00:15,282 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 11:00:15,282 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:00:15,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:00:15,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-13 11:00:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-07-13 11:00:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2022-07-13 11:00:15,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-13 11:00:15,287 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 11 [2022-07-13 11:00:15,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:00:15,287 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-13 11:00:15,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:15,287 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-13 11:00:15,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 11:00:15,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:00:15,288 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:00:15,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 11:00:15,288 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:00:15,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:00:15,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1044113915, now seen corresponding path program 1 times [2022-07-13 11:00:15,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:00:15,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666227856] [2022-07-13 11:00:15,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:00:15,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:00:15,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:00:15,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 11:00:15,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:00:15,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666227856] [2022-07-13 11:00:15,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666227856] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 11:00:15,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 11:00:15,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 11:00:15,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78600771] [2022-07-13 11:00:15,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 11:00:15,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 11:00:15,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:00:15,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 11:00:15,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-13 11:00:15,378 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:15,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:00:15,412 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-07-13 11:00:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 11:00:15,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-13 11:00:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:00:15,414 INFO L225 Difference]: With dead ends: 27 [2022-07-13 11:00:15,414 INFO L226 Difference]: Without dead ends: 23 [2022-07-13 11:00:15,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-13 11:00:15,415 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:00:15,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 29 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 11:00:15,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-13 11:00:15,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-07-13 11:00:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-13 11:00:15,421 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 17 [2022-07-13 11:00:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:00:15,421 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-13 11:00:15,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-13 11:00:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-13 11:00:15,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:00:15,422 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:00:15,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 11:00:15,423 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:00:15,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:00:15,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1654199858, now seen corresponding path program 1 times [2022-07-13 11:00:15,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:00:15,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081714174] [2022-07-13 11:00:15,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:00:15,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:00:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:00:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:15,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:00:15,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081714174] [2022-07-13 11:00:15,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081714174] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:00:15,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195665901] [2022-07-13 11:00:15,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:00:15,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:15,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:00:15,515 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) [2022-07-13 11:00:15,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 11:00:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:00:15,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 11:00:15,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:00:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:15,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:00:15,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:15,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195665901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:00:15,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:00:15,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-13 11:00:15,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267259175] [2022-07-13 11:00:15,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:00:15,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 11:00:15,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:00:15,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 11:00:15,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 11:00:15,700 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:15,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:00:15,787 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-07-13 11:00:15,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 11:00:15,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-13 11:00:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:00:15,789 INFO L225 Difference]: With dead ends: 43 [2022-07-13 11:00:15,789 INFO L226 Difference]: Without dead ends: 29 [2022-07-13 11:00:15,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-13 11:00:15,796 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:00:15,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 32 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:00:15,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-13 11:00:15,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-07-13 11:00:15,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:15,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-13 11:00:15,803 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 20 [2022-07-13 11:00:15,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:00:15,804 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-13 11:00:15,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:15,804 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-13 11:00:15,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-13 11:00:15,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:00:15,806 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:00:15,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 11:00:16,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:16,023 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:00:16,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:00:16,023 INFO L85 PathProgramCache]: Analyzing trace with hash 168847774, now seen corresponding path program 1 times [2022-07-13 11:00:16,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:00:16,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22616321] [2022-07-13 11:00:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:00:16,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:00:16,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:00:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:16,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:00:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22616321] [2022-07-13 11:00:16,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22616321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:00:16,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189000711] [2022-07-13 11:00:16,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:00:16,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:16,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:00:16,372 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) [2022-07-13 11:00:16,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 11:00:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:00:16,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 11:00:16,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:00:16,469 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 11:00:16,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-07-13 11:00:16,584 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 29 treesize of output 28 [2022-07-13 11:00:16,680 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 26 [2022-07-13 11:00:16,767 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-07-13 11:00:16,812 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:16,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:00:19,533 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 222 treesize of output 210 [2022-07-13 11:00:19,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:19,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189000711] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:00:19,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:00:19,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 27 [2022-07-13 11:00:19,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114759533] [2022-07-13 11:00:19,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:00:19,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 11:00:19,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:00:19,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 11:00:19,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=570, Unknown=2, NotChecked=0, Total=702 [2022-07-13 11:00:19,691 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 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) [2022-07-13 11:00:19,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:00:19,880 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2022-07-13 11:00:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 11:00:19,880 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 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 23 [2022-07-13 11:00:19,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:00:19,882 INFO L225 Difference]: With dead ends: 61 [2022-07-13 11:00:19,882 INFO L226 Difference]: Without dead ends: 41 [2022-07-13 11:00:19,883 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=174, Invalid=754, Unknown=2, NotChecked=0, Total=930 [2022-07-13 11:00:19,884 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 23 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:00:19,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 55 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 168 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2022-07-13 11:00:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-13 11:00:19,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-07-13 11:00:19,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 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) [2022-07-13 11:00:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-07-13 11:00:19,895 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 23 [2022-07-13 11:00:19,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:00:19,895 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-07-13 11:00:19,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 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) [2022-07-13 11:00:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-07-13 11:00:19,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 11:00:19,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:00:19,897 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:00:19,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 11:00:20,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:20,107 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:00:20,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:00:20,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1961352373, now seen corresponding path program 2 times [2022-07-13 11:00:20,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:00:20,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580133305] [2022-07-13 11:00:20,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:00:20,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:00:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:00:20,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:20,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:00:20,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580133305] [2022-07-13 11:00:20,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580133305] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:00:20,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799866256] [2022-07-13 11:00:20,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:00:20,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:20,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:00:20,193 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) [2022-07-13 11:00:20,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 11:00:20,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:00:20,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:00:20,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 11:00:20,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:00:20,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:20,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:00:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:20,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799866256] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:00:20,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:00:20,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-13 11:00:20,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078260503] [2022-07-13 11:00:20,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:00:20,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 11:00:20,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:00:20,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 11:00:20,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-13 11:00:20,319 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:20,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:00:20,444 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2022-07-13 11:00:20,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-13 11:00:20,444 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-13 11:00:20,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:00:20,445 INFO L225 Difference]: With dead ends: 81 [2022-07-13 11:00:20,445 INFO L226 Difference]: Without dead ends: 55 [2022-07-13 11:00:20,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-07-13 11:00:20,447 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 64 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:00:20,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 40 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:00:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-13 11:00:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2022-07-13 11:00:20,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-13 11:00:20,456 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 26 [2022-07-13 11:00:20,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:00:20,456 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-13 11:00:20,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-13 11:00:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-13 11:00:20,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:00:20,458 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:00:20,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 11:00:20,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:20,667 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:00:20,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:00:20,668 INFO L85 PathProgramCache]: Analyzing trace with hash 719394766, now seen corresponding path program 3 times [2022-07-13 11:00:20,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:00:20,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573402822] [2022-07-13 11:00:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:00:20,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:00:20,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:00:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:20,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:00:20,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573402822] [2022-07-13 11:00:20,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573402822] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:00:20,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586493468] [2022-07-13 11:00:20,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 11:00:20,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:20,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:00:20,748 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) [2022-07-13 11:00:20,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 11:00:20,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 11:00:20,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:00:20,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 11:00:20,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:00:20,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 11:00:20,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 11:00:21,022 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 [2022-07-13 11:00:21,144 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:00:21,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 37 [2022-07-13 11:00:21,259 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:00:21,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2022-07-13 11:00:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 11:00:21,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:00:23,212 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 100 treesize of output 94 [2022-07-13 11:00:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-13 11:00:23,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586493468] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:00:23,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:00:23,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 16, 14] total 34 [2022-07-13 11:00:23,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498253510] [2022-07-13 11:00:23,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:00:23,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 11:00:23,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:00:23,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 11:00:23,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=908, Unknown=1, NotChecked=0, Total=1122 [2022-07-13 11:00:23,268 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 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) [2022-07-13 11:00:23,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:00:23,674 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2022-07-13 11:00:23,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 11:00:23,674 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 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 26 [2022-07-13 11:00:23,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:00:23,675 INFO L225 Difference]: With dead ends: 71 [2022-07-13 11:00:23,675 INFO L226 Difference]: Without dead ends: 57 [2022-07-13 11:00:23,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=481, Invalid=1968, Unknown=1, NotChecked=0, Total=2450 [2022-07-13 11:00:23,676 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 11:00:23,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 64 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 77 Unchecked, 0.0s Time] [2022-07-13 11:00:23,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-07-13 11:00:23,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 42. [2022-07-13 11:00:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-07-13 11:00:23,683 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 26 [2022-07-13 11:00:23,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:00:23,684 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-07-13 11:00:23,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 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) [2022-07-13 11:00:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-07-13 11:00:23,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-13 11:00:23,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:00:23,685 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:00:23,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 11:00:23,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:23,891 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:00:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:00:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1198950171, now seen corresponding path program 4 times [2022-07-13 11:00:23,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:00:23,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184701786] [2022-07-13 11:00:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:00:23,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:00:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:00:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:24,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:00:24,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184701786] [2022-07-13 11:00:24,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184701786] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:00:24,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997223267] [2022-07-13 11:00:24,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 11:00:24,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:24,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:00:24,328 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) [2022-07-13 11:00:24,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 11:00:24,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 11:00:24,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:00:24,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 11:00:24,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:00:24,424 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 [2022-07-13 11:00:24,495 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 11:00:24,496 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 23 treesize of output 22 [2022-07-13 11:00:24,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:24,577 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:00:24,577 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-07-13 11:00:24,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:24,669 INFO L356 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2022-07-13 11:00:24,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 51 [2022-07-13 11:00:24,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:24,762 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:00:24,762 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 40 [2022-07-13 11:00:24,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:24,879 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:00:24,880 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 15 [2022-07-13 11:00:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:24,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:00:32,786 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_179 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_183 Int) (v_ArrVal_182 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (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|) v_ArrVal_179)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_179 0)) (not (<= v_ArrVal_183 (+ v_ArrVal_182 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_182)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_182 0)) (<= (+ v_ArrVal_183 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_183)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* c_~N~0 5)))))) is different from false [2022-07-13 11:00:44,509 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-13 11:00:44,510 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 2056 treesize of output 2002 [2022-07-13 11:00:44,764 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-13 11:00:44,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997223267] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:00:44,764 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:00:44,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 44 [2022-07-13 11:00:44,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735326050] [2022-07-13 11:00:44,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:00:44,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-13 11:00:44,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:00:44,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-13 11:00:44,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1579, Unknown=11, NotChecked=82, Total=1892 [2022-07-13 11:00:44,768 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:46,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:00:46,459 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2022-07-13 11:00:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-13 11:00:46,459 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-13 11:00:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:00:46,460 INFO L225 Difference]: With dead ends: 102 [2022-07-13 11:00:46,460 INFO L226 Difference]: Without dead ends: 64 [2022-07-13 11:00:46,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=564, Invalid=3719, Unknown=11, NotChecked=128, Total=4422 [2022-07-13 11:00:46,461 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 82 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 11:00:46,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 103 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 525 Invalid, 0 Unknown, 312 Unchecked, 0.4s Time] [2022-07-13 11:00:46,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-13 11:00:46,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2022-07-13 11:00:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:46,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-07-13 11:00:46,465 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 29 [2022-07-13 11:00:46,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:00:46,465 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-07-13 11:00:46,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7727272727272727) internal successors, (78), 44 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-07-13 11:00:46,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-13 11:00:46,466 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:00:46,466 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:00:46,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 11:00:46,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:46,667 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:00:46,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:00:46,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1722173266, now seen corresponding path program 5 times [2022-07-13 11:00:46,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:00:46,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948566820] [2022-07-13 11:00:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:00:46,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:00:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:00:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:46,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:00:46,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948566820] [2022-07-13 11:00:46,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948566820] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:00:46,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254107236] [2022-07-13 11:00:46,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 11:00:46,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:46,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:00:46,742 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) [2022-07-13 11:00:46,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 11:00:46,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-13 11:00:46,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:00:46,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-13 11:00:46,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:00:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:46,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:00:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:46,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254107236] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:00:46,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:00:46,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-13 11:00:46,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509153611] [2022-07-13 11:00:46,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:00:46,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 11:00:46,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:00:46,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 11:00:46,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-13 11:00:46,910 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:00:47,104 INFO L93 Difference]: Finished difference Result 102 states and 114 transitions. [2022-07-13 11:00:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-13 11:00:47,105 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-13 11:00:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:00:47,105 INFO L225 Difference]: With dead ends: 102 [2022-07-13 11:00:47,106 INFO L226 Difference]: Without dead ends: 62 [2022-07-13 11:00:47,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2022-07-13 11:00:47,107 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:00:47,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 34 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:00:47,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-13 11:00:47,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-07-13 11:00:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2022-07-13 11:00:47,112 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 32 [2022-07-13 11:00:47,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:00:47,112 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2022-07-13 11:00:47,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:00:47,112 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2022-07-13 11:00:47,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 11:00:47,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:00:47,113 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:00:47,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 11:00:47,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:47,331 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:00:47,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:00:47,332 INFO L85 PathProgramCache]: Analyzing trace with hash 456261758, now seen corresponding path program 6 times [2022-07-13 11:00:47,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:00:47,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199115205] [2022-07-13 11:00:47,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:00:47,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:00:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:00:48,023 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:48,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:00:48,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199115205] [2022-07-13 11:00:48,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199115205] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:00:48,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622457194] [2022-07-13 11:00:48,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 11:00:48,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:00:48,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:00:48,028 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) [2022-07-13 11:00:48,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 11:00:48,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-13 11:00:48,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:00:48,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-13 11:00:48,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:00:48,167 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 [2022-07-13 11:00:48,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,248 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 [2022-07-13 11:00:48,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2022-07-13 11:00:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,465 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 44 [2022-07-13 11:00:48,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:00:48,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 51 [2022-07-13 11:00:48,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:00:48,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 54 [2022-07-13 11:00:48,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 46 [2022-07-13 11:00:48,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:00:48,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 18 [2022-07-13 11:00:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:00:48,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:05,665 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_277 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_271 Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (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|) v_ArrVal_271)))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_277 (let ((.cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ .cse0 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |ULTIMATE.start_main_~#sum~0#1.offset| .cse0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (<= (+ v_ArrVal_277 (select (select (store .cse1 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_277)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* c_~N~0 5)) (not (<= v_ArrVal_271 0)))))) is different from false [2022-07-13 11:01:07,586 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_277 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_271 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (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| 4) v_ArrVal_271)))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (<= (+ v_ArrVal_277 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_277)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* c_~N~0 5)) (not (<= v_ArrVal_271 0)) (not (<= v_ArrVal_277 (let ((.cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| 0)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ .cse2 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| .cse2)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))))))))) is different from false [2022-07-13 11:01:34,792 INFO L356 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2022-07-13 11:01:34,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 465502 treesize of output 453190 [2022-07-13 11:01:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-07-13 11:01:53,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622457194] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:53,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:53,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18, 19] total 54 [2022-07-13 11:01:53,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592175394] [2022-07-13 11:01:53,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:53,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-13 11:01:53,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:53,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-13 11:01:53,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=2340, Unknown=22, NotChecked=202, Total=2862 [2022-07-13 11:01:53,993 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 54 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:55,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:55,319 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2022-07-13 11:01:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 11:01:55,319 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-13 11:01:55,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:55,319 INFO L225 Difference]: With dead ends: 80 [2022-07-13 11:01:55,320 INFO L226 Difference]: Without dead ends: 45 [2022-07-13 11:01:55,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1422 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=586, Invalid=4092, Unknown=22, NotChecked=270, Total=4970 [2022-07-13 11:01:55,322 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 59 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:55,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 97 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 519 Invalid, 0 Unknown, 305 Unchecked, 0.3s Time] [2022-07-13 11:01:55,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-07-13 11:01:55,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2022-07-13 11:01:55,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 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) [2022-07-13 11:01:55,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-07-13 11:01:55,331 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 35 [2022-07-13 11:01:55,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:55,331 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-07-13 11:01:55,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.8148148148148149) internal successors, (98), 54 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:55,332 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-07-13 11:01:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 11:01:55,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:55,332 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:55,348 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-13 11:01:55,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:55,548 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:55,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:55,550 INFO L85 PathProgramCache]: Analyzing trace with hash 518824043, now seen corresponding path program 7 times [2022-07-13 11:01:55,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:55,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433927050] [2022-07-13 11:01:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:55,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:55,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:55,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433927050] [2022-07-13 11:01:55,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433927050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:55,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881579763] [2022-07-13 11:01:55,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 11:01:55,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:55,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:55,647 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) [2022-07-13 11:01:55,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 11:01:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:55,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-13 11:01:55,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:55,802 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:55,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:01:55,846 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:55,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881579763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 11:01:55,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 11:01:55,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-13 11:01:55,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124264187] [2022-07-13 11:01:55,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 11:01:55,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 11:01:55,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 11:01:55,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 11:01:55,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-07-13 11:01:55,848 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:56,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 11:01:56,107 INFO L93 Difference]: Finished difference Result 135 states and 150 transitions. [2022-07-13 11:01:56,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 11:01:56,108 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-13 11:01:56,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 11:01:56,108 INFO L225 Difference]: With dead ends: 135 [2022-07-13 11:01:56,108 INFO L226 Difference]: Without dead ends: 78 [2022-07-13 11:01:56,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=344, Invalid=988, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 11:01:56,109 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 11:01:56,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 47 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 11:01:56,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-13 11:01:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 55. [2022-07-13 11:01:56,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 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) [2022-07-13 11:01:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2022-07-13 11:01:56,117 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 38 [2022-07-13 11:01:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 11:01:56,117 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2022-07-13 11:01:56,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 11:01:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2022-07-13 11:01:56,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 11:01:56,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 11:01:56,118 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 11:01:56,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 11:01:56,327 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,SelfDestructingSolverStorable10 [2022-07-13 11:01:56,328 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 11:01:56,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 11:01:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1270625221, now seen corresponding path program 8 times [2022-07-13 11:01:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 11:01:56,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531951651] [2022-07-13 11:01:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 11:01:56,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 11:01:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 11:01:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:57,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 11:01:57,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531951651] [2022-07-13 11:01:57,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531951651] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 11:01:57,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010063562] [2022-07-13 11:01:57,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 11:01:57,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 11:01:57,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 11:01:57,202 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) [2022-07-13 11:01:57,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 11:01:57,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 11:01:57,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 11:01:57,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-13 11:01:57,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 11:01:57,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-13 11:01:57,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 11:01:57,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-07-13 11:01:57,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2022-07-13 11:01:57,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 46 [2022-07-13 11:01:57,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,716 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2022-07-13 11:01:57,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:01:57,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,834 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 66 [2022-07-13 11:01:57,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:01:57,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:57,990 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 69 [2022-07-13 11:01:58,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:58,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:58,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:58,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:58,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:58,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:58,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 11:01:58,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 11:01:58,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 74 [2022-07-13 11:01:58,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 59 [2022-07-13 11:01:58,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-07-13 11:01:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 11:01:58,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 11:02:00,445 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_389 Int) (v_ArrVal_386 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_392 Int) (v_ArrVal_390 Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (or (not (<= v_ArrVal_386 0)) (not (<= v_ArrVal_392 (+ v_ArrVal_390 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_390)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 12 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (<= (+ v_ArrVal_392 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_392)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* c_~N~0 5)) (not (<= v_ArrVal_389 (+ v_ArrVal_386 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_386)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (not (<= v_ArrVal_390 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_389)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 8 |c_ULTIMATE.start_main_~a~0#1.offset|)) v_ArrVal_389)))))) is different from false [2022-07-13 11:03:17,527 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_389 Int) (v_ArrVal_386 Int) (v_ArrVal_384 Int) (v_ArrVal_382 Int) (|ULTIMATE.start_main_~#sum~0#1.offset| Int) (v_ArrVal_392 Int) (v_ArrVal_380 Int) (v_ArrVal_390 Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_380) (+ .cse2 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_382) (+ .cse2 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_384))))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (or (not (<= v_ArrVal_380 0)) (not (<= v_ArrVal_386 0)) (not (<= v_ArrVal_390 (+ v_ArrVal_389 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_389)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 8 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= v_ArrVal_389 (+ v_ArrVal_386 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_386)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))))) (<= (+ v_ArrVal_392 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_392)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (* c_~N~0 5)) (not (<= v_ArrVal_392 (+ v_ArrVal_390 (select (select (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse1 |ULTIMATE.start_main_~#sum~0#1.offset| v_ArrVal_390)) |c_ULTIMATE.start_main_~a~0#1.base|) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= v_ArrVal_382 0)) (not (<= v_ArrVal_384 0)))))) is different from false [2022-07-13 11:03:38,865 INFO L356 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2022-07-13 11:03:38,868 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 4834544 treesize of output 4803392 [2022-07-13 11:03:48,080 WARN L233 SmtUtils]: Spent 9.21s on a formula simplification that was a NOOP. DAG size: 3013 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-07-13 11:04:45,108 WARN L233 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 954 DAG size of output: 954 (called from [L 927] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)