./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr3.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-tiling/pnr3.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 e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:09:47,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:09:47,240 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:09:47,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:09:47,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:09:47,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:09:47,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:09:47,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:09:47,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:09:47,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:09:47,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:09:47,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:09:47,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:09:47,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:09:47,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:09:47,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:09:47,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:09:47,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:09:47,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:09:47,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:09:47,277 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:09:47,278 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:09:47,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:09:47,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:09:47,280 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:09:47,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:09:47,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:09:47,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:09:47,283 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:09:47,283 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:09:47,284 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:09:47,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:09:47,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:09:47,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:09:47,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:09:47,286 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:09:47,286 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:09:47,287 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:09:47,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:09:47,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:09:47,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:09:47,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:09:47,289 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:09:47,305 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:09:47,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:09:47,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:09:47,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:09:47,306 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:09:47,306 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:09:47,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:09:47,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:09:47,307 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:09:47,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:09:47,307 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:09:47,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:09:47,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:09:47,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:09:47,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:09:47,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:09:47,308 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:09:47,308 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:09:47,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:09:47,309 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:09:47,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:09:47,309 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:09:47,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:09:47,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:09:47,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:09:47,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:09:47,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:09:47,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:09:47,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:09:47,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:09:47,310 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:09:47,310 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:09:47,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:09:47,311 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e32269e91be552d606173d0b8eafd4ffa81c0e735dd375e4417d1ccfc27eaf5e [2022-07-13 10:09:47,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:09:47,463 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:09:47,465 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:09:47,465 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:09:47,466 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:09:47,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr3.c [2022-07-13 10:09:47,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d7c0a672/2b6a47ddf11140769973d941109954e1/FLAG6d1b71e1b [2022-07-13 10:09:47,822 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:09:47,822 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c [2022-07-13 10:09:47,827 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d7c0a672/2b6a47ddf11140769973d941109954e1/FLAG6d1b71e1b [2022-07-13 10:09:48,247 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d7c0a672/2b6a47ddf11140769973d941109954e1 [2022-07-13 10:09:48,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:09:48,251 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:09:48,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:09:48,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:09:48,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:09:48,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:09:48" (1/1) ... [2022-07-13 10:09:48,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f20eceb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48, skipping insertion in model container [2022-07-13 10:09:48,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:09:48" (1/1) ... [2022-07-13 10:09:48,268 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:09:48,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:09:48,393 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2022-07-13 10:09:48,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:09:48,436 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:09:48,450 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr3.c[395,408] [2022-07-13 10:09:48,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:09:48,477 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:09:48,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48 WrapperNode [2022-07-13 10:09:48,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:09:48,478 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:09:48,478 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:09:48,478 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:09:48,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48" (1/1) ... [2022-07-13 10:09:48,494 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48" (1/1) ... [2022-07-13 10:09:48,514 INFO L137 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 84 [2022-07-13 10:09:48,514 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:09:48,515 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:09:48,515 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:09:48,515 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:09:48,520 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48" (1/1) ... [2022-07-13 10:09:48,520 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48" (1/1) ... [2022-07-13 10:09:48,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48" (1/1) ... [2022-07-13 10:09:48,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48" (1/1) ... [2022-07-13 10:09:48,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48" (1/1) ... [2022-07-13 10:09:48,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48" (1/1) ... [2022-07-13 10:09:48,528 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48" (1/1) ... [2022-07-13 10:09:48,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:09:48,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:09:48,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:09:48,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:09:48,537 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48" (1/1) ... [2022-07-13 10:09:48,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:09:48,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:48,566 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 10:09:48,599 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 10:09:48,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:09:48,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:09:48,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:09:48,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 10:09:48,618 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-13 10:09:48,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-13 10:09:48,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:09:48,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:09:48,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:09:48,664 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:09:48,666 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:09:48,779 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:09:48,783 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:09:48,783 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 10:09:48,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:09:48 BoogieIcfgContainer [2022-07-13 10:09:48,785 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:09:48,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:09:48,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:09:48,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:09:48,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:09:48" (1/3) ... [2022-07-13 10:09:48,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb17202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:09:48, skipping insertion in model container [2022-07-13 10:09:48,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:09:48" (2/3) ... [2022-07-13 10:09:48,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3eb17202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:09:48, skipping insertion in model container [2022-07-13 10:09:48,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:09:48" (3/3) ... [2022-07-13 10:09:48,798 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr3.c [2022-07-13 10:09:48,807 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:09:48,807 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:09:48,835 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:09:48,839 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@25832107, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ccf079 [2022-07-13 10:09:48,840 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:09:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:09:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 10:09:48,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:48,847 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:48,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:48,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1781049194, now seen corresponding path program 1 times [2022-07-13 10:09:48,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:48,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065749400] [2022-07-13 10:09:48,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:48,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:48,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:49,000 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 10:09:49,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:49,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065749400] [2022-07-13 10:09:49,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065749400] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:09:49,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:09:49,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 10:09:49,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371027102] [2022-07-13 10:09:49,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:09:49,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 10:09:49,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:49,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 10:09:49,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 10:09:49,037 INFO L87 Difference]: Start difference. First operand has 31 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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 10:09:49,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:49,054 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2022-07-13 10:09:49,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 10:09:49,056 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 10:09:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:49,066 INFO L225 Difference]: With dead ends: 57 [2022-07-13 10:09:49,066 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 10:09:49,069 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 10:09:49,073 INFO L413 NwaCegarLoop]: 39 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, 39 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 10:09:49,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:09:49,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 10:09:49,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-13 10:09:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:09:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-13 10:09:49,110 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2022-07-13 10:09:49,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:49,111 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-13 10:09:49,112 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 10:09:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-13 10:09:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 10:09:49,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:49,114 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:49,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 10:09:49,114 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:49,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:49,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1807831303, now seen corresponding path program 1 times [2022-07-13 10:09:49,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:49,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828999446] [2022-07-13 10:09:49,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:49,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:49,313 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 10:09:49,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:49,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828999446] [2022-07-13 10:09:49,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828999446] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:09:49,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:09:49,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 10:09:49,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764363128] [2022-07-13 10:09:49,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:09:49,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 10:09:49,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:49,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 10:09:49,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:09:49,319 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 10:09:49,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:49,401 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-07-13 10:09:49,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 10:09:49,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 10:09:49,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:49,403 INFO L225 Difference]: With dead ends: 45 [2022-07-13 10:09:49,403 INFO L226 Difference]: Without dead ends: 38 [2022-07-13 10:09:49,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:09:49,404 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 53 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:49,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 32 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:09:49,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-13 10:09:49,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2022-07-13 10:09:49,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-13 10:09:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2022-07-13 10:09:49,411 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 11 [2022-07-13 10:09:49,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:49,411 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2022-07-13 10:09:49,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 10:09:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2022-07-13 10:09:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 10:09:49,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:49,412 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:49,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 10:09:49,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:49,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:49,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1367310263, now seen corresponding path program 1 times [2022-07-13 10:09:49,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:49,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265762427] [2022-07-13 10:09:49,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:49,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:49,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:49,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:49,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:09:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:49,622 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:49,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:49,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265762427] [2022-07-13 10:09:49,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265762427] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:49,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485415681] [2022-07-13 10:09:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:49,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:49,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:49,624 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 10:09:49,626 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 10:09:49,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:49,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 10:09:49,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:49,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:09:49,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:49,803 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 30 treesize of output 29 [2022-07-13 10:09:49,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:49,845 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 22 treesize of output 21 [2022-07-13 10:09:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:49,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:49,998 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-13 10:09:50,003 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 24 treesize of output 22 [2022-07-13 10:09:50,023 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:50,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485415681] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:50,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:50,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 12 [2022-07-13 10:09:50,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782813641] [2022-07-13 10:09:50,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:50,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 10:09:50,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:50,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 10:09:50,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-13 10:09:50,028 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-13 10:09:50,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:50,235 INFO L93 Difference]: Finished difference Result 84 states and 111 transitions. [2022-07-13 10:09:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 10:09:50,236 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 31 [2022-07-13 10:09:50,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:50,240 INFO L225 Difference]: With dead ends: 84 [2022-07-13 10:09:50,240 INFO L226 Difference]: Without dead ends: 82 [2022-07-13 10:09:50,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:09:50,241 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 79 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:50,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 181 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:09:50,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-13 10:09:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 42. [2022-07-13 10:09:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-13 10:09:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2022-07-13 10:09:50,249 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 31 [2022-07-13 10:09:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:50,249 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2022-07-13 10:09:50,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-13 10:09:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2022-07-13 10:09:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-13 10:09:50,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:50,251 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:50,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-13 10:09:50,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:50,469 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:50,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1238713291, now seen corresponding path program 1 times [2022-07-13 10:09:50,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:50,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096576681] [2022-07-13 10:09:50,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:50,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:50,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:50,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:50,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:50,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:09:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:50,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:50,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096576681] [2022-07-13 10:09:50,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096576681] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:50,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651907105] [2022-07-13 10:09:50,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:50,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:50,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:50,617 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 10:09:50,618 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 10:09:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:50,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 10:09:50,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:50,747 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 16 treesize of output 12 [2022-07-13 10:09:50,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:50,828 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 10:09:50,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:50,887 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 21 treesize of output 20 [2022-07-13 10:09:50,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 10:09:50,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:50,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:51,461 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-13 10:09:51,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-13 10:09:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:51,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651907105] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:51,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:51,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-13 10:09:51,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630049180] [2022-07-13 10:09:51,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:51,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 10:09:51,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:51,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 10:09:51,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:09:51,512 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 10:09:52,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:52,163 INFO L93 Difference]: Finished difference Result 137 states and 181 transitions. [2022-07-13 10:09:52,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 10:09:52,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 31 [2022-07-13 10:09:52,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:52,166 INFO L225 Difference]: With dead ends: 137 [2022-07-13 10:09:52,166 INFO L226 Difference]: Without dead ends: 135 [2022-07-13 10:09:52,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=1203, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 10:09:52,168 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 194 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:52,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 409 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 385 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-07-13 10:09:52,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-13 10:09:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 63. [2022-07-13 10:09:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 48 states have (on average 1.3125) internal successors, (63), 49 states have internal predecessors, (63), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-13 10:09:52,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 87 transitions. [2022-07-13 10:09:52,178 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 87 transitions. Word has length 31 [2022-07-13 10:09:52,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:52,178 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 87 transitions. [2022-07-13 10:09:52,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 10:09:52,178 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 87 transitions. [2022-07-13 10:09:52,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 10:09:52,179 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:52,179 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:52,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-13 10:09:52,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-13 10:09:52,398 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:52,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash -2026411713, now seen corresponding path program 1 times [2022-07-13 10:09:52,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:52,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803178718] [2022-07-13 10:09:52,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:52,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:09:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:52,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:52,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803178718] [2022-07-13 10:09:52,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803178718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:52,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076107532] [2022-07-13 10:09:52,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:52,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:52,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:52,604 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 10:09:52,606 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 10:09:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:52,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 10:09:52,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:52,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:09:52,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:52,724 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 42 treesize of output 41 [2022-07-13 10:09:52,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:52,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:52,829 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 17 treesize of output 15 [2022-07-13 10:09:52,831 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 30 treesize of output 26 [2022-07-13 10:09:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:52,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076107532] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:52,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:52,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-13 10:09:52,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599239268] [2022-07-13 10:09:52,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:52,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 10:09:52,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:52,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 10:09:52,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:09:52,856 INFO L87 Difference]: Start difference. First operand 63 states and 87 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-13 10:09:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:53,120 INFO L93 Difference]: Finished difference Result 202 states and 292 transitions. [2022-07-13 10:09:53,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 10:09:53,122 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 35 [2022-07-13 10:09:53,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:53,123 INFO L225 Difference]: With dead ends: 202 [2022-07-13 10:09:53,123 INFO L226 Difference]: Without dead ends: 200 [2022-07-13 10:09:53,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 67 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-13 10:09:53,124 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 83 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:53,124 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 265 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:09:53,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-13 10:09:53,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 105. [2022-07-13 10:09:53,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.35) internal successors, (108), 82 states have internal predecessors, (108), 22 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-13 10:09:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 152 transitions. [2022-07-13 10:09:53,145 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 152 transitions. Word has length 35 [2022-07-13 10:09:53,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:53,145 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 152 transitions. [2022-07-13 10:09:53,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 4 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-13 10:09:53,145 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 152 transitions. [2022-07-13 10:09:53,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-13 10:09:53,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:53,146 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:53,165 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 10:09:53,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:53,363 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:53,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:53,363 INFO L85 PathProgramCache]: Analyzing trace with hash 680207681, now seen corresponding path program 1 times [2022-07-13 10:09:53,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:53,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707676872] [2022-07-13 10:09:53,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:53,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:53,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:53,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:53,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:53,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:53,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:09:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:53,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:53,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707676872] [2022-07-13 10:09:53,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707676872] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:53,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538417042] [2022-07-13 10:09:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:53,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:53,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:53,539 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 10:09:53,541 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 10:09:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:53,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 10:09:53,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:53,658 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 16 treesize of output 12 [2022-07-13 10:09:53,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:53,713 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 10:09:53,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 10:09:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 10:09:53,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:53,884 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 17 treesize of output 15 [2022-07-13 10:09:53,886 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 34 treesize of output 30 [2022-07-13 10:09:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:53,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538417042] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:53,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:53,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2022-07-13 10:09:53,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475969703] [2022-07-13 10:09:53,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:53,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:09:53,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:53,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:09:53,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:09:53,940 INFO L87 Difference]: Start difference. First operand 105 states and 152 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 10:09:54,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:54,564 INFO L93 Difference]: Finished difference Result 318 states and 449 transitions. [2022-07-13 10:09:54,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-13 10:09:54,564 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 35 [2022-07-13 10:09:54,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:54,565 INFO L225 Difference]: With dead ends: 318 [2022-07-13 10:09:54,566 INFO L226 Difference]: Without dead ends: 316 [2022-07-13 10:09:54,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=320, Invalid=1572, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 10:09:54,567 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 175 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:54,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 450 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 482 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-07-13 10:09:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-13 10:09:54,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 148. [2022-07-13 10:09:54,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 110 states have (on average 1.3727272727272728) internal successors, (151), 113 states have internal predecessors, (151), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-13 10:09:54,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 217 transitions. [2022-07-13 10:09:54,585 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 217 transitions. Word has length 35 [2022-07-13 10:09:54,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:54,586 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 217 transitions. [2022-07-13 10:09:54,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 20 states have internal predecessors, (66), 6 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-13 10:09:54,586 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 217 transitions. [2022-07-13 10:09:54,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 10:09:54,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:54,587 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:54,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-13 10:09:54,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:54,803 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:54,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:54,804 INFO L85 PathProgramCache]: Analyzing trace with hash -406526155, now seen corresponding path program 2 times [2022-07-13 10:09:54,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:54,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436975238] [2022-07-13 10:09:54,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:54,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:54,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:54,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:54,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:09:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:54,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:54,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436975238] [2022-07-13 10:09:54,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436975238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:54,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037682879] [2022-07-13 10:09:54,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:09:54,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:54,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:54,875 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 10:09:54,883 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 10:09:54,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:09:54,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:54,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-13 10:09:54,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:54,945 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 13 treesize of output 9 [2022-07-13 10:09:54,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:54,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:55,026 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 17 treesize of output 15 [2022-07-13 10:09:55,028 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 30 treesize of output 26 [2022-07-13 10:09:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:55,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037682879] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:55,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:55,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-07-13 10:09:55,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244731421] [2022-07-13 10:09:55,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:55,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 10:09:55,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:55,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 10:09:55,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-13 10:09:55,053 INFO L87 Difference]: Start difference. First operand 148 states and 217 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 10:09:55,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:55,446 INFO L93 Difference]: Finished difference Result 629 states and 954 transitions. [2022-07-13 10:09:55,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 10:09:55,446 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2022-07-13 10:09:55,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:55,449 INFO L225 Difference]: With dead ends: 629 [2022-07-13 10:09:55,449 INFO L226 Difference]: Without dead ends: 627 [2022-07-13 10:09:55,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 73 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-07-13 10:09:55,450 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 65 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:55,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 314 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:09:55,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-07-13 10:09:55,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 337. [2022-07-13 10:09:55,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 252 states have (on average 1.4206349206349207) internal successors, (358), 252 states have internal predecessors, (358), 80 states have call successors, (80), 4 states have call predecessors, (80), 4 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2022-07-13 10:09:55,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 518 transitions. [2022-07-13 10:09:55,489 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 518 transitions. Word has length 39 [2022-07-13 10:09:55,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:55,489 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 518 transitions. [2022-07-13 10:09:55,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 12 states have internal predecessors, (44), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-13 10:09:55,490 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 518 transitions. [2022-07-13 10:09:55,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-13 10:09:55,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:55,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:55,513 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-13 10:09:55,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:55,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:55,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1686389833, now seen corresponding path program 1 times [2022-07-13 10:09:55,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:55,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673181718] [2022-07-13 10:09:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:55,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:55,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:55,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:55,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:09:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:55,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:55,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673181718] [2022-07-13 10:09:55,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673181718] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:55,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212765024] [2022-07-13 10:09:55,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:55,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:55,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:55,828 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 10:09:55,829 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 10:09:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:55,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-13 10:09:55,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:55,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 10:09:56,042 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:09:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:56,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:56,142 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 17 treesize of output 15 [2022-07-13 10:09:56,145 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 34 treesize of output 30 [2022-07-13 10:09:56,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212765024] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:56,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:09:56,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2022-07-13 10:09:56,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059472618] [2022-07-13 10:09:56,173 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:56,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 10:09:56,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:56,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 10:09:56,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2022-07-13 10:09:56,174 INFO L87 Difference]: Start difference. First operand 337 states and 518 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:09:56,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:56,952 INFO L93 Difference]: Finished difference Result 699 states and 1051 transitions. [2022-07-13 10:09:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-13 10:09:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-07-13 10:09:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:56,966 INFO L225 Difference]: With dead ends: 699 [2022-07-13 10:09:56,966 INFO L226 Difference]: Without dead ends: 697 [2022-07-13 10:09:56,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1913, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 10:09:56,968 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 171 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:56,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 327 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:09:56,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-07-13 10:09:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 160. [2022-07-13 10:09:56,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 122 states have (on average 1.3524590163934427) internal successors, (165), 125 states have internal predecessors, (165), 33 states have call successors, (33), 4 states have call predecessors, (33), 4 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-07-13 10:09:56,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 231 transitions. [2022-07-13 10:09:56,990 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 231 transitions. Word has length 39 [2022-07-13 10:09:56,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:56,991 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 231 transitions. [2022-07-13 10:09:56,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-13 10:09:56,991 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 231 transitions. [2022-07-13 10:09:56,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-13 10:09:56,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:56,992 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:57,020 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 10:09:57,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:57,211 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:57,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:57,211 INFO L85 PathProgramCache]: Analyzing trace with hash 685144619, now seen corresponding path program 3 times [2022-07-13 10:09:57,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:57,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787485060] [2022-07-13 10:09:57,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:57,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:57,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:57,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:57,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:09:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:57,384 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:57,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:57,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787485060] [2022-07-13 10:09:57,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787485060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:57,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458537892] [2022-07-13 10:09:57,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:09:57,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:57,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:57,385 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 10:09:57,386 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 10:09:57,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 10:09:57,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:57,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 10:09:57,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:57,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:09:57,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458537892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:09:57,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:09:57,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2022-07-13 10:09:57,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135648757] [2022-07-13 10:09:57,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:57,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-13 10:09:57,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:57,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-13 10:09:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2022-07-13 10:09:57,782 INFO L87 Difference]: Start difference. First operand 160 states and 231 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 10:09:58,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:09:58,032 INFO L93 Difference]: Finished difference Result 267 states and 383 transitions. [2022-07-13 10:09:58,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 10:09:58,033 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 43 [2022-07-13 10:09:58,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:09:58,034 INFO L225 Difference]: With dead ends: 267 [2022-07-13 10:09:58,034 INFO L226 Difference]: Without dead ends: 247 [2022-07-13 10:09:58,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=719, Unknown=0, NotChecked=0, Total=992 [2022-07-13 10:09:58,035 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 272 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:09:58,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 144 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:09:58,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-13 10:09:58,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 177. [2022-07-13 10:09:58,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 138 states have internal predecessors, (185), 34 states have call successors, (34), 4 states have call predecessors, (34), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-07-13 10:09:58,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 253 transitions. [2022-07-13 10:09:58,054 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 253 transitions. Word has length 43 [2022-07-13 10:09:58,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:09:58,054 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 253 transitions. [2022-07-13 10:09:58,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 27 states have internal predecessors, (88), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-13 10:09:58,054 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 253 transitions. [2022-07-13 10:09:58,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-13 10:09:58,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:09:58,055 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:09:58,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:09:58,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:58,275 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:09:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:09:58,276 INFO L85 PathProgramCache]: Analyzing trace with hash 466828189, now seen corresponding path program 2 times [2022-07-13 10:09:58,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:09:58,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163427270] [2022-07-13 10:09:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:09:58,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:09:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:58,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:09:58,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:58,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:09:58,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:58,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:09:58,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:58,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:09:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:58,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:09:58,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:58,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:09:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:09:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:09:58,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:09:58,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163427270] [2022-07-13 10:09:58,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163427270] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:58,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918752254] [2022-07-13 10:09:58,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:09:58,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:09:58,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:09:58,478 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 10:09:58,479 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 10:09:58,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:09:58,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:09:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 10:09:58,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:09:58,581 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 16 treesize of output 12 [2022-07-13 10:09:58,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:58,644 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 10:09:58,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:58,688 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 10:09:58,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:58,767 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 24 treesize of output 23 [2022-07-13 10:09:58,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:58,808 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 24 treesize of output 23 [2022-07-13 10:09:58,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:09:58,854 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 24 treesize of output 23 [2022-07-13 10:09:58,899 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 10:09:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 10:09:58,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:09:59,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918752254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:09:59,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:09:59,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-13 10:09:59,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236948706] [2022-07-13 10:09:59,731 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:09:59,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 10:09:59,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:09:59,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 10:09:59,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2022-07-13 10:09:59,731 INFO L87 Difference]: Start difference. First operand 177 states and 253 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-13 10:10:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:00,290 INFO L93 Difference]: Finished difference Result 242 states and 338 transitions. [2022-07-13 10:10:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 10:10:00,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 51 [2022-07-13 10:10:00,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:00,292 INFO L225 Difference]: With dead ends: 242 [2022-07-13 10:10:00,292 INFO L226 Difference]: Without dead ends: 240 [2022-07-13 10:10:00,292 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 69 SyntacticMatches, 12 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=237, Invalid=1168, Unknown=1, NotChecked=0, Total=1406 [2022-07-13 10:10:00,293 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 141 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:00,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 315 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 399 Invalid, 0 Unknown, 43 Unchecked, 0.2s Time] [2022-07-13 10:10:00,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-07-13 10:10:00,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 141. [2022-07-13 10:10:00,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 110 states have (on average 1.3) internal successors, (143), 110 states have internal predecessors, (143), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-13 10:10:00,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 193 transitions. [2022-07-13 10:10:00,310 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 193 transitions. Word has length 51 [2022-07-13 10:10:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:00,310 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 193 transitions. [2022-07-13 10:10:00,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-13 10:10:00,310 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 193 transitions. [2022-07-13 10:10:00,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-13 10:10:00,311 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:00,311 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:00,327 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 10:10:00,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-13 10:10:00,526 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:00,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:00,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1257132653, now seen corresponding path program 2 times [2022-07-13 10:10:00,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:00,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050856875] [2022-07-13 10:10:00,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:00,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:00,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:00,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:00,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:00,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:00,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:10:00,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:00,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:10:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:00,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:00,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050856875] [2022-07-13 10:10:00,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050856875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:00,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6276694] [2022-07-13 10:10:00,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:10:00,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:00,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:00,681 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 10:10:00,682 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 10:10:00,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:10:00,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:00,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 10:10:00,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:00,817 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 16 treesize of output 12 [2022-07-13 10:10:00,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:10:00,881 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 10:10:00,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:10:00,942 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 26 treesize of output 25 [2022-07-13 10:10:01,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:10:01,008 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 26 treesize of output 25 [2022-07-13 10:10:01,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:10:01,063 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 26 treesize of output 25 [2022-07-13 10:10:01,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 10:10:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 10:10:01,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:01,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6276694] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:01,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:10:01,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-13 10:10:01,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666906379] [2022-07-13 10:10:01,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:01,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 10:10:01,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:01,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 10:10:01,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=391, Unknown=1, NotChecked=0, Total=462 [2022-07-13 10:10:01,626 INFO L87 Difference]: Start difference. First operand 141 states and 193 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-13 10:10:02,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:02,133 INFO L93 Difference]: Finished difference Result 204 states and 277 transitions. [2022-07-13 10:10:02,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-13 10:10:02,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 55 [2022-07-13 10:10:02,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:02,135 INFO L225 Difference]: With dead ends: 204 [2022-07-13 10:10:02,135 INFO L226 Difference]: Without dead ends: 202 [2022-07-13 10:10:02,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 71 SyntacticMatches, 10 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=286, Invalid=1435, Unknown=1, NotChecked=0, Total=1722 [2022-07-13 10:10:02,136 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 144 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:02,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 333 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 434 Invalid, 0 Unknown, 50 Unchecked, 0.2s Time] [2022-07-13 10:10:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-13 10:10:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 78. [2022-07-13 10:10:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 62 states have internal predecessors, (75), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-13 10:10:02,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 99 transitions. [2022-07-13 10:10:02,164 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 99 transitions. Word has length 55 [2022-07-13 10:10:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:02,164 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 99 transitions. [2022-07-13 10:10:02,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 7 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2022-07-13 10:10:02,165 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 99 transitions. [2022-07-13 10:10:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 10:10:02,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:02,165 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:02,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:02,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:02,381 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:02,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1929317243, now seen corresponding path program 4 times [2022-07-13 10:10:02,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:02,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2221270] [2022-07-13 10:10:02,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:02,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:02,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:02,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:02,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:02,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:02,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:02,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:10:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:02,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:10:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:02,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:02,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2221270] [2022-07-13 10:10:02,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2221270] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:02,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072100740] [2022-07-13 10:10:02,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:10:02,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:02,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:02,581 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:02,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:10:02,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:10:02,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:02,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 10:10:02,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:02,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:10:02,696 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:10:02,699 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 30 treesize of output 29 [2022-07-13 10:10:02,714 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:10:02,715 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 24 treesize of output 23 [2022-07-13 10:10:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:02,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:02,887 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 17 treesize of output 15 [2022-07-13 10:10:02,889 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 30 treesize of output 26 [2022-07-13 10:10:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:02,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072100740] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:02,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:02,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-07-13 10:10:02,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143871564] [2022-07-13 10:10:02,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:02,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 10:10:02,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:02,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 10:10:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-07-13 10:10:02,918 INFO L87 Difference]: Start difference. First operand 78 states and 99 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-07-13 10:10:04,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:04,526 INFO L93 Difference]: Finished difference Result 688 states and 1044 transitions. [2022-07-13 10:10:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-13 10:10:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) Word has length 63 [2022-07-13 10:10:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:04,533 INFO L225 Difference]: With dead ends: 688 [2022-07-13 10:10:04,533 INFO L226 Difference]: Without dead ends: 686 [2022-07-13 10:10:04,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 122 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1515 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=682, Invalid=3874, Unknown=0, NotChecked=0, Total=4556 [2022-07-13 10:10:04,535 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 273 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 866 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:04,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 866 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-13 10:10:04,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2022-07-13 10:10:04,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 133. [2022-07-13 10:10:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 102 states have (on average 1.3137254901960784) internal successors, (134), 103 states have internal predecessors, (134), 26 states have call successors, (26), 4 states have call predecessors, (26), 4 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-13 10:10:04,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 186 transitions. [2022-07-13 10:10:04,571 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 186 transitions. Word has length 63 [2022-07-13 10:10:04,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:04,571 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 186 transitions. [2022-07-13 10:10:04,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 7 states have call successors, (14), 1 states have call predecessors, (14), 1 states have return successors, (14), 7 states have call predecessors, (14), 7 states have call successors, (14) [2022-07-13 10:10:04,571 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 186 transitions. [2022-07-13 10:10:04,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 10:10:04,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:04,572 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:04,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:04,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-13 10:10:04,787 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:04,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:04,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1664050179, now seen corresponding path program 1 times [2022-07-13 10:10:04,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:04,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400913461] [2022-07-13 10:10:04,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:04,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:04,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:10:04,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:10:04,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:04,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:04,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400913461] [2022-07-13 10:10:04,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400913461] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:04,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628041612] [2022-07-13 10:10:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:04,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:04,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:04,961 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:04,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:10:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:05,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 10:10:05,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:05,111 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 16 treesize of output 12 [2022-07-13 10:10:05,170 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:10:05,170 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 29 treesize of output 28 [2022-07-13 10:10:05,215 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:10:05,215 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 10:10:05,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:10:05,367 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-13 10:10:05,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:07,929 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 17 treesize of output 15 [2022-07-13 10:10:07,933 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 34 treesize of output 30 [2022-07-13 10:10:07,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628041612] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:07,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:10:07,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2022-07-13 10:10:07,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979516624] [2022-07-13 10:10:07,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:07,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 10:10:07,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:07,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 10:10:07,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=623, Unknown=1, NotChecked=0, Total=702 [2022-07-13 10:10:07,965 INFO L87 Difference]: Start difference. First operand 133 states and 186 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 10:10:09,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:09,122 INFO L93 Difference]: Finished difference Result 327 states and 444 transitions. [2022-07-13 10:10:09,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 10:10:09,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 63 [2022-07-13 10:10:09,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:09,123 INFO L225 Difference]: With dead ends: 327 [2022-07-13 10:10:09,123 INFO L226 Difference]: Without dead ends: 325 [2022-07-13 10:10:09,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=459, Invalid=3446, Unknown=1, NotChecked=0, Total=3906 [2022-07-13 10:10:09,125 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 235 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:09,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 663 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 956 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2022-07-13 10:10:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-07-13 10:10:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 161. [2022-07-13 10:10:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 122 states have (on average 1.3278688524590163) internal successors, (162), 123 states have internal predecessors, (162), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-13 10:10:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 226 transitions. [2022-07-13 10:10:09,162 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 226 transitions. Word has length 63 [2022-07-13 10:10:09,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:09,162 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 226 transitions. [2022-07-13 10:10:09,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 10:10:09,162 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 226 transitions. [2022-07-13 10:10:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 10:10:09,164 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:09,164 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:09,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-13 10:10:09,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 10:10:09,372 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:09,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2043081871, now seen corresponding path program 5 times [2022-07-13 10:10:09,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:09,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798156235] [2022-07-13 10:10:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:09,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:09,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:09,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:09,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:09,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:09,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:09,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:10:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:09,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:10:09,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:09,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:09,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798156235] [2022-07-13 10:10:09,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798156235] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:09,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434627262] [2022-07-13 10:10:09,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:10:09,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:09,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:09,528 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:09,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:10:09,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-13 10:10:09,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:09,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 10:10:09,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:09,672 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:10:09,695 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:10:09,696 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 30 treesize of output 29 [2022-07-13 10:10:09,801 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:10:09,801 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 46 treesize of output 24 [2022-07-13 10:10:09,815 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:09,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:09,873 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 17 treesize of output 15 [2022-07-13 10:10:09,874 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 30 treesize of output 26 [2022-07-13 10:10:09,912 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:09,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434627262] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:09,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:09,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2022-07-13 10:10:09,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168188695] [2022-07-13 10:10:09,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:09,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 10:10:09,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:09,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 10:10:09,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-07-13 10:10:09,914 INFO L87 Difference]: Start difference. First operand 161 states and 226 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-13 10:10:11,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:11,970 INFO L93 Difference]: Finished difference Result 1723 states and 2679 transitions. [2022-07-13 10:10:11,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-13 10:10:11,970 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 67 [2022-07-13 10:10:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:11,975 INFO L225 Difference]: With dead ends: 1723 [2022-07-13 10:10:11,975 INFO L226 Difference]: Without dead ends: 1721 [2022-07-13 10:10:11,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=721, Invalid=5441, Unknown=0, NotChecked=0, Total=6162 [2022-07-13 10:10:11,977 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 173 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 2915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:11,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 1048 Invalid, 2915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-13 10:10:11,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1721 states. [2022-07-13 10:10:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1721 to 347. [2022-07-13 10:10:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 262 states have (on average 1.3854961832061068) internal successors, (363), 263 states have internal predecessors, (363), 78 states have call successors, (78), 6 states have call predecessors, (78), 6 states have return successors, (78), 77 states have call predecessors, (78), 78 states have call successors, (78) [2022-07-13 10:10:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 519 transitions. [2022-07-13 10:10:12,083 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 519 transitions. Word has length 67 [2022-07-13 10:10:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:12,084 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 519 transitions. [2022-07-13 10:10:12,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 4 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-13 10:10:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 519 transitions. [2022-07-13 10:10:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 10:10:12,085 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:12,085 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:12,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:12,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 10:10:12,294 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:12,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:12,294 INFO L85 PathProgramCache]: Analyzing trace with hash -656878477, now seen corresponding path program 1 times [2022-07-13 10:10:12,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:12,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659282479] [2022-07-13 10:10:12,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:12,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:12,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:12,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:12,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:12,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:12,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:10:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:12,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:10:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:12,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:12,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659282479] [2022-07-13 10:10:12,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659282479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:12,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477637175] [2022-07-13 10:10:12,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:12,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:12,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:12,453 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:12,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 10:10:12,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:12,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 10:10:12,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:12,584 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 16 treesize of output 12 [2022-07-13 10:10:12,641 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:10:12,641 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 10:10:12,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:10:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 45 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-13 10:10:12,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:14,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:10:14,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-13 10:10:14,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477637175] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:14,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:10:14,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-13 10:10:14,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696536587] [2022-07-13 10:10:14,981 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:14,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 10:10:14,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:14,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 10:10:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=822, Unknown=1, NotChecked=0, Total=930 [2022-07-13 10:10:14,982 INFO L87 Difference]: Start difference. First operand 347 states and 519 transitions. Second operand has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 10:10:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:16,990 INFO L93 Difference]: Finished difference Result 1529 states and 2319 transitions. [2022-07-13 10:10:16,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-07-13 10:10:16,991 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 67 [2022-07-13 10:10:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:16,995 INFO L225 Difference]: With dead ends: 1529 [2022-07-13 10:10:16,995 INFO L226 Difference]: Without dead ends: 1527 [2022-07-13 10:10:16,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 96 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2488 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=778, Invalid=6703, Unknown=1, NotChecked=0, Total=7482 [2022-07-13 10:10:17,000 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 397 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 931 SdHoareTripleChecker+Invalid, 2377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 127 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:17,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [412 Valid, 931 Invalid, 2377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 1663 Invalid, 0 Unknown, 127 Unchecked, 0.8s Time] [2022-07-13 10:10:17,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1527 states. [2022-07-13 10:10:17,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1527 to 425. [2022-07-13 10:10:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 318 states have (on average 1.3930817610062893) internal successors, (443), 319 states have internal predecessors, (443), 96 states have call successors, (96), 10 states have call predecessors, (96), 10 states have return successors, (96), 95 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-13 10:10:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 635 transitions. [2022-07-13 10:10:17,130 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 635 transitions. Word has length 67 [2022-07-13 10:10:17,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:17,130 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 635 transitions. [2022-07-13 10:10:17,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.625) internal successors, (87), 24 states have internal predecessors, (87), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 10:10:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 635 transitions. [2022-07-13 10:10:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 10:10:17,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:17,136 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:17,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:17,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-13 10:10:17,349 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:17,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:17,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1810243687, now seen corresponding path program 6 times [2022-07-13 10:10:17,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:17,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111249901] [2022-07-13 10:10:17,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:17,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:17,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:17,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:17,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:17,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:17,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:17,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:17,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:17,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:10:17,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:17,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:10:17,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:17,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:17,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111249901] [2022-07-13 10:10:17,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111249901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:17,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4636199] [2022-07-13 10:10:17,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:10:17,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:17,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:17,483 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:17,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 10:10:17,553 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-13 10:10:17,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:17,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 10:10:17,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:17,636 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 13 treesize of output 9 [2022-07-13 10:10:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:17,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:17,870 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-13 10:10:17,872 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 36 treesize of output 32 [2022-07-13 10:10:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:17,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4636199] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:17,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:17,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-07-13 10:10:17,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597174340] [2022-07-13 10:10:17,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:17,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 10:10:17,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:17,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 10:10:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-07-13 10:10:17,914 INFO L87 Difference]: Start difference. First operand 425 states and 635 transitions. Second operand has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 10:10:24,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:24,467 INFO L93 Difference]: Finished difference Result 7738 states and 12276 transitions. [2022-07-13 10:10:24,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-07-13 10:10:24,468 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2022-07-13 10:10:24,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:24,492 INFO L225 Difference]: With dead ends: 7738 [2022-07-13 10:10:24,492 INFO L226 Difference]: Without dead ends: 7736 [2022-07-13 10:10:24,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 144 SyntacticMatches, 4 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12150 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2970, Invalid=26786, Unknown=0, NotChecked=0, Total=29756 [2022-07-13 10:10:24,498 INFO L413 NwaCegarLoop]: 443 mSDtfsCounter, 484 mSDsluCounter, 1758 mSDsCounter, 0 mSdLazyCounter, 5186 mSolverCounterSat, 1614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 7525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1614 IncrementalHoareTripleChecker+Valid, 5186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 725 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:24,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [499 Valid, 2201 Invalid, 7525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1614 Valid, 5186 Invalid, 0 Unknown, 725 Unchecked, 2.5s Time] [2022-07-13 10:10:24,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7736 states. [2022-07-13 10:10:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7736 to 1019. [2022-07-13 10:10:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1019 states, 758 states have (on average 1.4313984168865435) internal successors, (1085), 759 states have internal predecessors, (1085), 250 states have call successors, (250), 10 states have call predecessors, (250), 10 states have return successors, (250), 249 states have call predecessors, (250), 250 states have call successors, (250) [2022-07-13 10:10:24,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1019 states to 1019 states and 1585 transitions. [2022-07-13 10:10:24,891 INFO L78 Accepts]: Start accepts. Automaton has 1019 states and 1585 transitions. Word has length 71 [2022-07-13 10:10:24,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:24,892 INFO L495 AbstractCegarLoop]: Abstraction has 1019 states and 1585 transitions. [2022-07-13 10:10:24,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.923076923076923) internal successors, (102), 26 states have internal predecessors, (102), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 10:10:24,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1019 states and 1585 transitions. [2022-07-13 10:10:24,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 10:10:24,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:24,893 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:24,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:25,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:25,110 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:25,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:25,110 INFO L85 PathProgramCache]: Analyzing trace with hash -561495575, now seen corresponding path program 1 times [2022-07-13 10:10:25,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:25,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614217835] [2022-07-13 10:10:25,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:25,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:25,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:25,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:25,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:25,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:25,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:25,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:25,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:10:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:25,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:10:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:25,254 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:25,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:25,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614217835] [2022-07-13 10:10:25,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614217835] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:25,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178696058] [2022-07-13 10:10:25,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:25,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:25,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:25,256 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:25,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 10:10:25,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:25,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-13 10:10:25,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:25,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 10:10:25,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:10:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:25,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:25,859 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 17 treesize of output 15 [2022-07-13 10:10:25,862 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 34 treesize of output 30 [2022-07-13 10:10:25,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178696058] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:25,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:10:25,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2022-07-13 10:10:25,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948848668] [2022-07-13 10:10:25,912 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:25,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-13 10:10:25,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:25,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-13 10:10:25,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2022-07-13 10:10:25,913 INFO L87 Difference]: Start difference. First operand 1019 states and 1585 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 10:10:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:28,572 INFO L93 Difference]: Finished difference Result 2343 states and 3582 transitions. [2022-07-13 10:10:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-13 10:10:28,572 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 71 [2022-07-13 10:10:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:28,579 INFO L225 Difference]: With dead ends: 2343 [2022-07-13 10:10:28,579 INFO L226 Difference]: Without dead ends: 2341 [2022-07-13 10:10:28,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3026 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1287, Invalid=8613, Unknown=0, NotChecked=0, Total=9900 [2022-07-13 10:10:28,581 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 291 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 1898 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 2394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 1898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:28,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 986 Invalid, 2394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 1898 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 10:10:28,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2341 states. [2022-07-13 10:10:28,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2341 to 461. [2022-07-13 10:10:28,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 354 states have (on average 1.3587570621468927) internal successors, (481), 355 states have internal predecessors, (481), 96 states have call successors, (96), 10 states have call predecessors, (96), 10 states have return successors, (96), 95 states have call predecessors, (96), 96 states have call successors, (96) [2022-07-13 10:10:28,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 673 transitions. [2022-07-13 10:10:28,799 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 673 transitions. Word has length 71 [2022-07-13 10:10:28,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:28,799 INFO L495 AbstractCegarLoop]: Abstraction has 461 states and 673 transitions. [2022-07-13 10:10:28,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 4 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-13 10:10:28,799 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 673 transitions. [2022-07-13 10:10:28,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-13 10:10:28,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:28,800 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:28,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:29,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 10:10:29,016 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:29,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:29,016 INFO L85 PathProgramCache]: Analyzing trace with hash -629945763, now seen corresponding path program 7 times [2022-07-13 10:10:29,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:29,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884211767] [2022-07-13 10:10:29,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:29,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:29,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:10:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:10:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 51 proven. 34 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:29,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:29,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884211767] [2022-07-13 10:10:29,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884211767] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:29,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194019536] [2022-07-13 10:10:29,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:10:29,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:29,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:29,288 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:29,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 10:10:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:29,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-13 10:10:29,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:29,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 72 proven. 13 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-13 10:10:30,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194019536] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:30,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:30,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2022-07-13 10:10:30,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121491308] [2022-07-13 10:10:30,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:30,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-13 10:10:30,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:30,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-13 10:10:30,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2022-07-13 10:10:30,043 INFO L87 Difference]: Start difference. First operand 461 states and 673 transitions. Second operand has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-13 10:10:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:30,498 INFO L93 Difference]: Finished difference Result 537 states and 775 transitions. [2022-07-13 10:10:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-13 10:10:30,499 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 75 [2022-07-13 10:10:30,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:30,502 INFO L225 Difference]: With dead ends: 537 [2022-07-13 10:10:30,503 INFO L226 Difference]: Without dead ends: 505 [2022-07-13 10:10:30,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1616, Unknown=0, NotChecked=0, Total=2162 [2022-07-13 10:10:30,504 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 264 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:30,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 205 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:10:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-07-13 10:10:30,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 471. [2022-07-13 10:10:30,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 362 states have (on average 1.339779005524862) internal successors, (485), 363 states have internal predecessors, (485), 98 states have call successors, (98), 10 states have call predecessors, (98), 10 states have return successors, (98), 97 states have call predecessors, (98), 98 states have call successors, (98) [2022-07-13 10:10:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 681 transitions. [2022-07-13 10:10:30,671 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 681 transitions. Word has length 75 [2022-07-13 10:10:30,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:30,671 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 681 transitions. [2022-07-13 10:10:30,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-07-13 10:10:30,671 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 681 transitions. [2022-07-13 10:10:30,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-13 10:10:30,672 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:30,673 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:30,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:30,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 10:10:30,880 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:30,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:30,880 INFO L85 PathProgramCache]: Analyzing trace with hash 159587245, now seen corresponding path program 8 times [2022-07-13 10:10:30,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:30,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272973469] [2022-07-13 10:10:30,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:30,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:31,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:31,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:31,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:31,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:31,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:10:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:31,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:10:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:31,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 10:10:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:31,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 10:10:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:31,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 10:10:31,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 10:10:31,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:31,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272973469] [2022-07-13 10:10:31,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272973469] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:31,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573960891] [2022-07-13 10:10:31,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:10:31,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:31,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:31,041 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:31,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 10:10:31,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:10:31,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:31,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 10:10:31,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:31,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:10:31,200 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:10:31,201 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 30 treesize of output 29 [2022-07-13 10:10:31,222 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:10:31,223 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 30 treesize of output 29 [2022-07-13 10:10:31,382 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:10:31,382 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 46 treesize of output 24 [2022-07-13 10:10:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 10:10:31,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:31,479 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 17 treesize of output 15 [2022-07-13 10:10:31,480 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 30 treesize of output 26 [2022-07-13 10:10:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 10:10:31,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573960891] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:31,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:31,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2022-07-13 10:10:31,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929354817] [2022-07-13 10:10:31,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:31,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-13 10:10:31,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:31,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-13 10:10:31,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-07-13 10:10:31,530 INFO L87 Difference]: Start difference. First operand 471 states and 681 transitions. Second operand has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-13 10:10:45,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:45,223 INFO L93 Difference]: Finished difference Result 14381 states and 22875 transitions. [2022-07-13 10:10:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 277 states. [2022-07-13 10:10:45,224 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 95 [2022-07-13 10:10:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:45,269 INFO L225 Difference]: With dead ends: 14381 [2022-07-13 10:10:45,269 INFO L226 Difference]: Without dead ends: 14379 [2022-07-13 10:10:45,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 194 SyntacticMatches, 9 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34745 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5132, Invalid=72988, Unknown=0, NotChecked=0, Total=78120 [2022-07-13 10:10:45,278 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 450 mSDsluCounter, 2819 mSDsCounter, 0 mSdLazyCounter, 10299 mSolverCounterSat, 2203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 477 SdHoareTripleChecker+Valid, 3547 SdHoareTripleChecker+Invalid, 12502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2203 IncrementalHoareTripleChecker+Valid, 10299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:45,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [477 Valid, 3547 Invalid, 12502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2203 Valid, 10299 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-07-13 10:10:45,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14379 states. [2022-07-13 10:10:45,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14379 to 1115. [2022-07-13 10:10:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 842 states have (on average 1.4097387173396674) internal successors, (1187), 843 states have internal predecessors, (1187), 262 states have call successors, (262), 10 states have call predecessors, (262), 10 states have return successors, (262), 261 states have call predecessors, (262), 262 states have call successors, (262) [2022-07-13 10:10:45,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1711 transitions. [2022-07-13 10:10:45,940 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1711 transitions. Word has length 95 [2022-07-13 10:10:45,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:45,941 INFO L495 AbstractCegarLoop]: Abstraction has 1115 states and 1711 transitions. [2022-07-13 10:10:45,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.409090909090909) internal successors, (97), 22 states have internal predecessors, (97), 5 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-07-13 10:10:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1711 transitions. [2022-07-13 10:10:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-13 10:10:45,943 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:45,943 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:45,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:46,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:46,161 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:46,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:46,161 INFO L85 PathProgramCache]: Analyzing trace with hash -737806033, now seen corresponding path program 2 times [2022-07-13 10:10:46,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:46,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370472034] [2022-07-13 10:10:46,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:46,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:46,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:46,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:46,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:46,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:46,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:10:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:46,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:10:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:46,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:10:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:46,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 10:10:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:46,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 10:10:46,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:46,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 10:10:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 10:10:46,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:46,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370472034] [2022-07-13 10:10:46,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370472034] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:46,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100591375] [2022-07-13 10:10:46,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:10:46,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:46,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:46,372 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:10:46,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 10:10:46,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:10:46,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:10:46,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 10:10:46,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:46,594 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 16 treesize of output 12 [2022-07-13 10:10:46,645 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:10:46,645 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 29 treesize of output 28 [2022-07-13 10:10:46,683 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:10:46,684 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 10:10:46,842 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:10:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 42 proven. 108 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-13 10:10:46,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:47,454 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 17 treesize of output 15 [2022-07-13 10:10:47,458 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 34 treesize of output 30 [2022-07-13 10:10:47,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100591375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:47,502 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:10:47,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-07-13 10:10:47,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166834206] [2022-07-13 10:10:47,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:47,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 10:10:47,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:47,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 10:10:47,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1335, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 10:10:47,504 INFO L87 Difference]: Start difference. First operand 1115 states and 1711 transitions. Second operand has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-13 10:11:00,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:00,862 INFO L93 Difference]: Finished difference Result 5383 states and 8417 transitions. [2022-07-13 10:11:00,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-07-13 10:11:00,863 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 95 [2022-07-13 10:11:00,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:00,893 INFO L225 Difference]: With dead ends: 5383 [2022-07-13 10:11:00,907 INFO L226 Difference]: Without dead ends: 5381 [2022-07-13 10:11:00,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4689 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1060, Invalid=11818, Unknown=4, NotChecked=0, Total=12882 [2022-07-13 10:11:00,911 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 475 mSDsluCounter, 2041 mSDsCounter, 0 mSdLazyCounter, 4433 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 2263 SdHoareTripleChecker+Invalid, 5460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 4433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 186 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:00,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [496 Valid, 2263 Invalid, 5460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 4433 Invalid, 0 Unknown, 186 Unchecked, 1.9s Time] [2022-07-13 10:11:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5381 states. [2022-07-13 10:11:01,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5381 to 1253. [2022-07-13 10:11:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 942 states have (on average 1.4171974522292994) internal successors, (1335), 943 states have internal predecessors, (1335), 298 states have call successors, (298), 12 states have call predecessors, (298), 12 states have return successors, (298), 297 states have call predecessors, (298), 298 states have call successors, (298) [2022-07-13 10:11:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 1931 transitions. [2022-07-13 10:11:01,624 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 1931 transitions. Word has length 95 [2022-07-13 10:11:01,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:01,624 INFO L495 AbstractCegarLoop]: Abstraction has 1253 states and 1931 transitions. [2022-07-13 10:11:01,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.966666666666667) internal successors, (119), 30 states have internal predecessors, (119), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-13 10:11:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 1931 transitions. [2022-07-13 10:11:01,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-13 10:11:01,626 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:01,626 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:01,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:01,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:01,839 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:01,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:01,840 INFO L85 PathProgramCache]: Analyzing trace with hash 519418531, now seen corresponding path program 9 times [2022-07-13 10:11:01,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:01,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718819098] [2022-07-13 10:11:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:01,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:01,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:01,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:01,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:01,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:01,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:11:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:01,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:11:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:02,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:11:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:02,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 10:11:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:02,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 10:11:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:02,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 10:11:02,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 10:11:02,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:02,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718819098] [2022-07-13 10:11:02,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718819098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:02,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301427787] [2022-07-13 10:11:02,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:11:02,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:02,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:02,014 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:02,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 10:11:02,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 10:11:02,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:02,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 10:11:02,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:02,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:11:02,360 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:11:02,360 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 30 treesize of output 29 [2022-07-13 10:11:02,548 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:11:02,549 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 46 treesize of output 24 [2022-07-13 10:11:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 10:11:02,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:02,649 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 17 treesize of output 15 [2022-07-13 10:11:02,650 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 30 treesize of output 26 [2022-07-13 10:11:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 10:11:02,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301427787] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:02,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:02,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-07-13 10:11:02,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978506204] [2022-07-13 10:11:02,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:02,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 10:11:02,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:02,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 10:11:02,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-07-13 10:11:02,718 INFO L87 Difference]: Start difference. First operand 1253 states and 1931 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-13 10:11:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:51,344 INFO L93 Difference]: Finished difference Result 56420 states and 90300 transitions. [2022-07-13 10:11:51,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 574 states. [2022-07-13 10:11:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 99 [2022-07-13 10:11:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:51,495 INFO L225 Difference]: With dead ends: 56420 [2022-07-13 10:11:51,495 INFO L226 Difference]: Without dead ends: 56418 [2022-07-13 10:11:51,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 201 SyntacticMatches, 8 SemanticMatches, 576 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157170 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=15652, Invalid=317854, Unknown=0, NotChecked=0, Total=333506 [2022-07-13 10:11:51,530 INFO L413 NwaCegarLoop]: 1458 mSDtfsCounter, 690 mSDsluCounter, 6800 mSDsCounter, 0 mSdLazyCounter, 22735 mSolverCounterSat, 5125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 8258 SdHoareTripleChecker+Invalid, 27860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5125 IncrementalHoareTripleChecker+Valid, 22735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:51,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [720 Valid, 8258 Invalid, 27860 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5125 Valid, 22735 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-07-13 10:11:51,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56418 states. [2022-07-13 10:11:54,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56418 to 3183. [2022-07-13 10:11:54,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3183 states, 2368 states have (on average 1.4484797297297298) internal successors, (3430), 2369 states have internal predecessors, (3430), 802 states have call successors, (802), 12 states have call predecessors, (802), 12 states have return successors, (802), 801 states have call predecessors, (802), 802 states have call successors, (802) [2022-07-13 10:11:54,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3183 states to 3183 states and 5034 transitions. [2022-07-13 10:11:54,307 INFO L78 Accepts]: Start accepts. Automaton has 3183 states and 5034 transitions. Word has length 99 [2022-07-13 10:11:54,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:54,308 INFO L495 AbstractCegarLoop]: Abstraction has 3183 states and 5034 transitions. [2022-07-13 10:11:54,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 5 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-13 10:11:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3183 states and 5034 transitions. [2022-07-13 10:11:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-13 10:11:54,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:54,315 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 7, 7, 7, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:54,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-13 10:11:54,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:54,532 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash 943065253, now seen corresponding path program 2 times [2022-07-13 10:11:54,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:54,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916953479] [2022-07-13 10:11:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:54,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:54,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:54,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:54,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:54,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:54,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:11:54,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:54,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:11:54,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:54,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:11:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:54,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 10:11:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:54,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 10:11:54,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:54,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 10:11:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 10:11:54,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:54,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916953479] [2022-07-13 10:11:54,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916953479] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:54,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292060757] [2022-07-13 10:11:54,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:11:54,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:54,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:54,733 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:54,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 10:11:54,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:11:54,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:54,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-13 10:11:54,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:54,976 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 16 treesize of output 12 [2022-07-13 10:11:55,048 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:11:55,049 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 10:11:55,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:11:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 24 proven. 134 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:11:55,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:55,559 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 17 treesize of output 15 [2022-07-13 10:11:55,561 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 34 treesize of output 30 [2022-07-13 10:11:55,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292060757] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:55,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:11:55,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-07-13 10:11:55,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529804546] [2022-07-13 10:11:55,596 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:55,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-13 10:11:55,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:55,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-13 10:11:55,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2022-07-13 10:11:55,597 INFO L87 Difference]: Start difference. First operand 3183 states and 5034 transitions. Second operand has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-13 10:12:18,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:12:18,230 INFO L93 Difference]: Finished difference Result 19001 states and 30290 transitions. [2022-07-13 10:12:18,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-07-13 10:12:18,231 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 99 [2022-07-13 10:12:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:12:18,307 INFO L225 Difference]: With dead ends: 19001 [2022-07-13 10:12:18,308 INFO L226 Difference]: Without dead ends: 18999 [2022-07-13 10:12:18,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 169 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1569, Invalid=20183, Unknown=4, NotChecked=0, Total=21756 [2022-07-13 10:12:18,314 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 842 mSDsluCounter, 2489 mSDsCounter, 0 mSdLazyCounter, 7218 mSolverCounterSat, 1382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 863 SdHoareTripleChecker+Valid, 2836 SdHoareTripleChecker+Invalid, 9031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1382 IncrementalHoareTripleChecker+Valid, 7218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:12:18,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [863 Valid, 2836 Invalid, 9031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1382 Valid, 7218 Invalid, 0 Unknown, 431 Unchecked, 3.1s Time] [2022-07-13 10:12:18,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18999 states. [2022-07-13 10:12:20,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18999 to 3547. [2022-07-13 10:12:20,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 2632 states have (on average 1.452127659574468) internal successors, (3822), 2633 states have internal predecessors, (3822), 898 states have call successors, (898), 16 states have call predecessors, (898), 16 states have return successors, (898), 897 states have call predecessors, (898), 898 states have call successors, (898) [2022-07-13 10:12:20,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 5618 transitions. [2022-07-13 10:12:20,440 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 5618 transitions. Word has length 99 [2022-07-13 10:12:20,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:12:20,440 INFO L495 AbstractCegarLoop]: Abstraction has 3547 states and 5618 transitions. [2022-07-13 10:12:20,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.96875) internal successors, (127), 32 states have internal predecessors, (127), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-07-13 10:12:20,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 5618 transitions. [2022-07-13 10:12:20,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 10:12:20,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:12:20,444 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:12:20,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 10:12:20,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-13 10:12:20,663 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:12:20,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:12:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1220267295, now seen corresponding path program 3 times [2022-07-13 10:12:20,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:12:20,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104525975] [2022-07-13 10:12:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:12:20,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:12:20,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:12:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:12:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:12:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:12:20,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:12:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:12:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 10:12:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 10:12:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 10:12:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-13 10:12:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-07-13 10:12:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-13 10:12:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:20,936 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-13 10:12:20,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:12:20,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104525975] [2022-07-13 10:12:20,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104525975] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:12:20,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653539940] [2022-07-13 10:12:20,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:12:20,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:12:20,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:12:20,938 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:12:20,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 10:12:21,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-13 10:12:21,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:12:21,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 10:12:21,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:12:21,258 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 16 treesize of output 12 [2022-07-13 10:12:21,324 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:12:21,325 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 29 treesize of output 28 [2022-07-13 10:12:21,375 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:12:21,375 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 29 treesize of output 28 [2022-07-13 10:12:21,448 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:12:21,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:12:21,499 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:12:21,499 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:12:21,548 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:12:21,548 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:12:21,623 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:12:21,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:12:21,675 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:12:21,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:12:21,722 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:12:21,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:12:21,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:12:21,860 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 106 proven. 78 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-13 10:12:21,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:12:24,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653539940] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:12:24,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:12:24,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-13 10:12:24,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639825481] [2022-07-13 10:12:24,959 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:12:24,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 10:12:24,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:12:24,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 10:12:24,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=884, Unknown=2, NotChecked=0, Total=992 [2022-07-13 10:12:24,960 INFO L87 Difference]: Start difference. First operand 3547 states and 5618 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-07-13 10:12:28,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:12:28,173 INFO L93 Difference]: Finished difference Result 3783 states and 5859 transitions. [2022-07-13 10:12:28,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 10:12:28,174 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) Word has length 103 [2022-07-13 10:12:28,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:12:28,190 INFO L225 Difference]: With dead ends: 3783 [2022-07-13 10:12:28,190 INFO L226 Difference]: Without dead ends: 3781 [2022-07-13 10:12:28,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 136 SyntacticMatches, 19 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=456, Invalid=3324, Unknown=2, NotChecked=0, Total=3782 [2022-07-13 10:12:28,192 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 204 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:12:28,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 688 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1052 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-07-13 10:12:28,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3781 states. [2022-07-13 10:12:29,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3781 to 2020. [2022-07-13 10:12:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 1498 states have (on average 1.4425901201602136) internal successors, (2161), 1499 states have internal predecessors, (2161), 503 states have call successors, (503), 18 states have call predecessors, (503), 18 states have return successors, (503), 502 states have call predecessors, (503), 503 states have call successors, (503) [2022-07-13 10:12:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 3167 transitions. [2022-07-13 10:12:29,860 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 3167 transitions. Word has length 103 [2022-07-13 10:12:29,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:12:29,860 INFO L495 AbstractCegarLoop]: Abstraction has 2020 states and 3167 transitions. [2022-07-13 10:12:29,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 26 states have internal predecessors, (111), 11 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2022-07-13 10:12:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 3167 transitions. [2022-07-13 10:12:29,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-13 10:12:29,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:12:29,864 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:12:29,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-13 10:12:30,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-13 10:12:30,078 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:12:30,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:12:30,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2058870425, now seen corresponding path program 10 times [2022-07-13 10:12:30,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:12:30,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533091056] [2022-07-13 10:12:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:12:30,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:12:30,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:30,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:12:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:30,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:12:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:30,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:12:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:30,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-13 10:12:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:30,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:12:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:30,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:12:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:30,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-13 10:12:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:30,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-13 10:12:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:30,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 10:12:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 10:12:30,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:12:30,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533091056] [2022-07-13 10:12:30,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533091056] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:12:30,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268162843] [2022-07-13 10:12:30,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:12:30,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:12:30,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:12:30,272 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:12:30,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 10:12:30,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:12:30,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:12:30,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 10:12:30,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:12:30,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:12:30,656 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:12:30,656 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 46 treesize of output 24 [2022-07-13 10:12:30,674 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 10:12:30,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:12:30,738 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 17 treesize of output 15 [2022-07-13 10:12:30,739 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 30 treesize of output 26 [2022-07-13 10:12:30,798 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-13 10:12:30,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268162843] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:12:30,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:12:30,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2022-07-13 10:12:30,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414615004] [2022-07-13 10:12:30,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:12:30,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 10:12:30,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:12:30,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 10:12:30,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-07-13 10:12:30,799 INFO L87 Difference]: Start difference. First operand 2020 states and 3167 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 states have internal predecessors, (108), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)