./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/rewnif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/rewnif.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 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:51:42,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:51:42,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:51:42,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:51:42,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:51:42,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:51:42,272 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:51:42,277 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:51:42,278 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:51:42,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:51:42,283 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:51:42,285 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:51:42,285 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:51:42,287 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:51:42,288 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:51:42,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:51:42,290 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:51:42,291 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:51:42,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:51:42,297 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:51:42,299 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:51:42,300 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:51:42,300 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:51:42,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:51:42,302 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:51:42,305 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:51:42,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:51:42,306 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:51:42,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:51:42,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:51:42,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:51:42,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:51:42,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:51:42,310 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:51:42,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:51:42,311 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:51:42,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:51:42,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:51:42,312 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:51:42,312 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:51:42,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:51:42,314 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:51:42,315 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:51:42,339 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:51:42,340 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:51:42,340 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:51:42,340 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:51:42,341 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:51:42,341 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:51:42,341 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:51:42,341 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:51:42,342 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:51:42,342 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:51:42,342 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:51:42,343 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:51:42,343 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:51:42,343 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:51:42,343 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:51:42,343 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:51:42,343 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:51:42,343 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:51:42,344 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:51:42,344 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:51:42,344 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:51:42,344 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:51:42,344 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:51:42,344 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:51:42,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:51:42,345 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:51:42,345 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:51:42,345 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:51:42,345 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:51:42,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:51:42,345 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:51:42,346 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:51:42,346 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:51:42,346 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 [2022-07-22 09:51:42,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:51:42,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:51:42,568 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:51:42,569 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:51:42,570 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:51:42,571 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/rewnif.c [2022-07-22 09:51:42,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0269d6744/1897a760da224308b59d226a25f31492/FLAGabc1bc69d [2022-07-22 09:51:42,976 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:51:42,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/rewnif.c [2022-07-22 09:51:42,982 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0269d6744/1897a760da224308b59d226a25f31492/FLAGabc1bc69d [2022-07-22 09:51:42,991 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0269d6744/1897a760da224308b59d226a25f31492 [2022-07-22 09:51:42,993 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:51:42,994 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:51:42,995 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:51:42,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:51:42,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:51:42,998 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:51:42" (1/1) ... [2022-07-22 09:51:42,999 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37448f26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:42, skipping insertion in model container [2022-07-22 09:51:42,999 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:51:42" (1/1) ... [2022-07-22 09:51:43,003 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:51:43,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:51:43,148 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/rewnif.c[397,410] [2022-07-22 09:51:43,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:51:43,197 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:51:43,207 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/rewnif.c[397,410] [2022-07-22 09:51:43,214 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:51:43,242 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:51:43,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43 WrapperNode [2022-07-22 09:51:43,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:51:43,244 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:51:43,244 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:51:43,244 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:51:43,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 09:51:43,268 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 09:51:43,281 INFO L137 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2022-07-22 09:51:43,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:51:43,283 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:51:43,283 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:51:43,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:51:43,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 09:51:43,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 09:51:43,296 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 09:51:43,297 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 09:51:43,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 09:51:43,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 09:51:43,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 09:51:43,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:51:43,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:51:43,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:51:43,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:51:43,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (1/1) ... [2022-07-22 09:51:43,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:51:43,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:51:43,341 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) [2022-07-22 09:51:43,359 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 [2022-07-22 09:51:43,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:51:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:51:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:51:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 09:51:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:51:43,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:51:43,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:51:43,416 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:51:43,418 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:51:43,501 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:51:43,505 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:51:43,505 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 09:51:43,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:51:43 BoogieIcfgContainer [2022-07-22 09:51:43,532 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:51:43,533 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:51:43,533 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:51:43,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:51:43,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:51:42" (1/3) ... [2022-07-22 09:51:43,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f93745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:51:43, skipping insertion in model container [2022-07-22 09:51:43,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:51:43" (2/3) ... [2022-07-22 09:51:43,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74f93745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:51:43, skipping insertion in model container [2022-07-22 09:51:43,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:51:43" (3/3) ... [2022-07-22 09:51:43,538 INFO L111 eAbstractionObserver]: Analyzing ICFG rewnif.c [2022-07-22 09:51:43,561 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:51:43,562 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:51:43,598 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:51:43,603 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@76d1aad7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@70a6de7c [2022-07-22 09:51:43,603 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:51:43,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:43,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 09:51:43,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:51:43,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:51:43,631 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:51:43,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:51:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2022-07-22 09:51:43,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:51:43,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377869216] [2022-07-22 09:51:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:51:43,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:51:43,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:51:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:43,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:51:43,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377869216] [2022-07-22 09:51:43,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377869216] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:51:43,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:51:43,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 09:51:43,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618466333] [2022-07-22 09:51:43,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:51:43,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 09:51:43,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:51:43,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 09:51:43,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:51:43,821 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:43,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:51:43,831 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-07-22 09:51:43,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 09:51:43,832 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-22 09:51:43,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:51:43,837 INFO L225 Difference]: With dead ends: 29 [2022-07-22 09:51:43,838 INFO L226 Difference]: Without dead ends: 14 [2022-07-22 09:51:43,840 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 [2022-07-22 09:51:43,844 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:51:43,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:51:43,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-22 09:51:43,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-22 09:51:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:43,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-22 09:51:43,866 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-07-22 09:51:43,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:51:43,867 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-22 09:51:43,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:43,868 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-22 09:51:43,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 09:51:43,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:51:43,868 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:51:43,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:51:43,869 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:51:43,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:51:43,871 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2022-07-22 09:51:43,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:51:43,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711452592] [2022-07-22 09:51:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:51:43,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:51:43,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:51:43,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:43,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:51:43,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711452592] [2022-07-22 09:51:43,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711452592] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:51:43,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:51:43,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:51:43,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508223485] [2022-07-22 09:51:43,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:51:43,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:51:43,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:51:43,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:51:43,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:51:43,954 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:51:43,998 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-07-22 09:51:43,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:51:43,998 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-22 09:51:43,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:51:43,999 INFO L225 Difference]: With dead ends: 29 [2022-07-22 09:51:44,001 INFO L226 Difference]: Without dead ends: 18 [2022-07-22 09:51:44,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:51:44,002 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:51:44,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:51:44,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-22 09:51:44,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-07-22 09:51:44,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:44,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-22 09:51:44,007 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-07-22 09:51:44,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:51:44,008 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-22 09:51:44,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:44,009 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-22 09:51:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 09:51:44,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:51:44,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:51:44,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 09:51:44,012 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:51:44,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:51:44,012 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2022-07-22 09:51:44,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:51:44,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943918839] [2022-07-22 09:51:44,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:51:44,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:51:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:51:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:44,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:51:44,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943918839] [2022-07-22 09:51:44,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943918839] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:51:44,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594788856] [2022-07-22 09:51:44,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:51:44,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:51:44,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:51:44,081 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) [2022-07-22 09:51:44,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:51:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:51:44,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 09:51:44,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:51:44,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:44,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:51:44,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:44,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594788856] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:51:44,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:51:44,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 09:51:44,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492686202] [2022-07-22 09:51:44,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:51:44,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 09:51:44,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:51:44,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 09:51:44,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:51:44,313 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:51:44,367 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-07-22 09:51:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 09:51:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-22 09:51:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:51:44,369 INFO L225 Difference]: With dead ends: 34 [2022-07-22 09:51:44,369 INFO L226 Difference]: Without dead ends: 27 [2022-07-22 09:51:44,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-07-22 09:51:44,372 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:51:44,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:51:44,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-22 09:51:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-07-22 09:51:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-22 09:51:44,378 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-07-22 09:51:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:51:44,379 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-22 09:51:44,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-22 09:51:44,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 09:51:44,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:51:44,380 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:51:44,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 09:51:44,596 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 [2022-07-22 09:51:44,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:51:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:51:44,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2022-07-22 09:51:44,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:51:44,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093647951] [2022-07-22 09:51:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:51:44,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:51:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:51:44,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:44,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:51:44,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093647951] [2022-07-22 09:51:44,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093647951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:51:44,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614455332] [2022-07-22 09:51:44,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:51:44,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:51:44,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:51:44,802 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) [2022-07-22 09:51:44,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:51:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:51:44,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 09:51:44,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:51:44,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:51:44,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:44,961 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 34 treesize of output 33 [2022-07-22 09:51:45,013 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 [2022-07-22 09:51:45,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:45,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:01,152 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:52:01,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 66 [2022-07-22 09:52:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:01,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614455332] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:01,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:01,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2022-07-22 09:52:01,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953145339] [2022-07-22 09:52:01,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:01,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 09:52:01,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:01,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 09:52:01,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=177, Unknown=5, NotChecked=0, Total=240 [2022-07-22 09:52:01,195 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:01,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:01,337 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-07-22 09:52:01,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 09:52:01,338 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-22 09:52:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:01,339 INFO L225 Difference]: With dead ends: 28 [2022-07-22 09:52:01,339 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 09:52:01,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=115, Invalid=300, Unknown=5, NotChecked=0, Total=420 [2022-07-22 09:52:01,340 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 45 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:01,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 100 Invalid, 0 Unknown, 6 Unchecked, 0.1s Time] [2022-07-22 09:52:01,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 09:52:01,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-07-22 09:52:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-07-22 09:52:01,343 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-07-22 09:52:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:01,344 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-07-22 09:52:01,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-07-22 09:52:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 09:52:01,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:01,345 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:01,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 09:52:01,576 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 [2022-07-22 09:52:01,577 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:01,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:01,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2022-07-22 09:52:01,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:01,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532504988] [2022-07-22 09:52:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:01,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:01,656 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:01,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:01,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532504988] [2022-07-22 09:52:01,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532504988] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:01,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634429129] [2022-07-22 09:52:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:01,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:01,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:01,660 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) [2022-07-22 09:52:01,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:52:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:01,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 09:52:01,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:01,718 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 [2022-07-22 09:52:01,750 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 [2022-07-22 09:52:01,761 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:01,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:01,791 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:52:01,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:52:01,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:01,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634429129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:01,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:01,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-07-22 09:52:01,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131226951] [2022-07-22 09:52:01,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:01,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 09:52:01,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:01,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 09:52:01,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-07-22 09:52:01,818 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:01,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:01,966 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-07-22 09:52:01,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 09:52:01,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-22 09:52:01,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:01,967 INFO L225 Difference]: With dead ends: 60 [2022-07-22 09:52:01,967 INFO L226 Difference]: Without dead ends: 58 [2022-07-22 09:52:01,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 29 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-07-22 09:52:01,968 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:01,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 67 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:52:01,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-22 09:52:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2022-07-22 09:52:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-07-22 09:52:01,973 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2022-07-22 09:52:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:01,973 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-07-22 09:52:01,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-07-22 09:52:01,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 09:52:01,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:01,974 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:01,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:02,191 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 [2022-07-22 09:52:02,191 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:02,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:02,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2022-07-22 09:52:02,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:02,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878158949] [2022-07-22 09:52:02,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:02,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:02,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:02,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:02,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878158949] [2022-07-22 09:52:02,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878158949] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:02,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342712667] [2022-07-22 09:52:02,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:52:02,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:02,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:02,251 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) [2022-07-22 09:52:02,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:52:02,293 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:52:02,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:02,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 09:52:02,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:02,351 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:02,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:02,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342712667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:02,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:02,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-22 09:52:02,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396619865] [2022-07-22 09:52:02,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:02,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 09:52:02,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:02,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 09:52:02,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:52:02,390 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:02,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:02,491 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-07-22 09:52:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 09:52:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-22 09:52:02,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:02,492 INFO L225 Difference]: With dead ends: 85 [2022-07-22 09:52:02,492 INFO L226 Difference]: Without dead ends: 47 [2022-07-22 09:52:02,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-07-22 09:52:02,493 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:02,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:52:02,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-22 09:52:02,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-07-22 09:52:02,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:02,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-07-22 09:52:02,497 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2022-07-22 09:52:02,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:02,498 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-07-22 09:52:02,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:02,498 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-07-22 09:52:02,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:52:02,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:02,499 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:02,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:02,715 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 [2022-07-22 09:52:02,715 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:02,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:02,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1364521933, now seen corresponding path program 3 times [2022-07-22 09:52:02,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:02,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877845983] [2022-07-22 09:52:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:02,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:02,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:02,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:02,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877845983] [2022-07-22 09:52:02,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877845983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:02,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156688699] [2022-07-22 09:52:02,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:52:02,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:02,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:02,842 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) [2022-07-22 09:52:02,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:52:02,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 09:52:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:02,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 09:52:02,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:02,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:52:02,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:52:02,965 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 [2022-07-22 09:52:02,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:52:02,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:52:03,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:52:03,000 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:52:03,060 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 [2022-07-22 09:52:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:03,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:03,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:52:03,171 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 37 treesize of output 33 [2022-07-22 09:52:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:52:03,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156688699] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:03,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:03,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 21 [2022-07-22 09:52:03,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690025846] [2022-07-22 09:52:03,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:03,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 09:52:03,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:03,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 09:52:03,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-07-22 09:52:03,187 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:03,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:03,401 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-07-22 09:52:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-22 09:52:03,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-22 09:52:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:03,402 INFO L225 Difference]: With dead ends: 55 [2022-07-22 09:52:03,402 INFO L226 Difference]: Without dead ends: 53 [2022-07-22 09:52:03,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2022-07-22 09:52:03,403 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:03,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 96 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:52:03,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-22 09:52:03,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2022-07-22 09:52:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:03,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-07-22 09:52:03,407 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2022-07-22 09:52:03,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:03,407 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-07-22 09:52:03,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:03,407 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-07-22 09:52:03,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 09:52:03,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:03,420 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:03,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:03,635 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 [2022-07-22 09:52:03,635 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:03,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 4 times [2022-07-22 09:52:03,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:03,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89356466] [2022-07-22 09:52:03,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:03,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:03,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:03,737 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:03,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:03,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89356466] [2022-07-22 09:52:03,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89356466] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:03,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749983665] [2022-07-22 09:52:03,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:52:03,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:03,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:03,741 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) [2022-07-22 09:52:03,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 09:52:03,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:52:03,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 09:52:03,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:03,811 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 [2022-07-22 09:52:03,861 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 [2022-07-22 09:52:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:03,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:03,910 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:52:03,912 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:52:03,944 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:03,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749983665] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:03,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:03,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 15 [2022-07-22 09:52:03,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528068372] [2022-07-22 09:52:03,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:03,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 09:52:03,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:03,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 09:52:03,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-07-22 09:52:03,946 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:04,161 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-07-22 09:52:04,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 09:52:04,162 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-22 09:52:04,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:04,163 INFO L225 Difference]: With dead ends: 72 [2022-07-22 09:52:04,163 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 09:52:04,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-07-22 09:52:04,164 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:04,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 107 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:52:04,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 09:52:04,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 45. [2022-07-22 09:52:04,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-07-22 09:52:04,169 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 28 [2022-07-22 09:52:04,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:04,169 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-07-22 09:52:04,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-07-22 09:52:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 09:52:04,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:04,170 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:04,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:04,389 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 [2022-07-22 09:52:04,390 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:04,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:04,390 INFO L85 PathProgramCache]: Analyzing trace with hash 948898404, now seen corresponding path program 5 times [2022-07-22 09:52:04,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:04,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211357633] [2022-07-22 09:52:04,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:04,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:04,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:04,440 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:04,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:04,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211357633] [2022-07-22 09:52:04,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211357633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:04,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138897051] [2022-07-22 09:52:04,441 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:52:04,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:04,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:04,455 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) [2022-07-22 09:52:04,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 09:52:04,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 09:52:04,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:04,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 09:52:04,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:04,607 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:04,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:04,644 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:04,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138897051] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:04,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:04,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-22 09:52:04,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34771539] [2022-07-22 09:52:04,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:04,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 09:52:04,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 09:52:04,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-22 09:52:04,646 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:04,739 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2022-07-22 09:52:04,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 09:52:04,740 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-22 09:52:04,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:04,741 INFO L225 Difference]: With dead ends: 82 [2022-07-22 09:52:04,741 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 09:52:04,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:52:04,741 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:04,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 53 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:52:04,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 09:52:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 45. [2022-07-22 09:52:04,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-07-22 09:52:04,748 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 32 [2022-07-22 09:52:04,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:04,749 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-07-22 09:52:04,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,749 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-07-22 09:52:04,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 09:52:04,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:04,753 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:04,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:04,963 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 [2022-07-22 09:52:04,963 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:04,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:04,964 INFO L85 PathProgramCache]: Analyzing trace with hash 367413348, now seen corresponding path program 6 times [2022-07-22 09:52:04,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:04,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267783815] [2022-07-22 09:52:04,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:04,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:04,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:05,119 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:05,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:05,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267783815] [2022-07-22 09:52:05,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267783815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:05,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80674375] [2022-07-22 09:52:05,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:52:05,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:05,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:05,136 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) [2022-07-22 09:52:05,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 09:52:05,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 09:52:05,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:05,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 09:52:05,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:05,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:52:05,299 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:52:05,299 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 [2022-07-22 09:52:05,313 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:52:05,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:52:05,356 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:52:05,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:52:05,416 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 [2022-07-22 09:52:05,430 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:05,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:17,659 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 39 treesize of output 37 [2022-07-22 09:52:17,662 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 201 treesize of output 193 [2022-07-22 09:52:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:17,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80674375] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:17,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:17,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 26 [2022-07-22 09:52:17,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663523460] [2022-07-22 09:52:17,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:17,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 09:52:17,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:17,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 09:52:17,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=536, Unknown=6, NotChecked=0, Total=650 [2022-07-22 09:52:17,738 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:24,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:24,113 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2022-07-22 09:52:24,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 09:52:24,113 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-22 09:52:24,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:24,114 INFO L225 Difference]: With dead ends: 89 [2022-07-22 09:52:24,114 INFO L226 Difference]: Without dead ends: 87 [2022-07-22 09:52:24,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 52 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=246, Invalid=1551, Unknown=9, NotChecked=0, Total=1806 [2022-07-22 09:52:24,115 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 54 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:24,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 120 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 293 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-07-22 09:52:24,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-22 09:52:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 53. [2022-07-22 09:52:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 52 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:24,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-07-22 09:52:24,122 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 36 [2022-07-22 09:52:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:24,122 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-07-22 09:52:24,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:24,123 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-07-22 09:52:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-22 09:52:24,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:24,123 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:24,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-22 09:52:24,335 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 [2022-07-22 09:52:24,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:24,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:24,336 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 7 times [2022-07-22 09:52:24,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:24,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969249489] [2022-07-22 09:52:24,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:24,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:24,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969249489] [2022-07-22 09:52:24,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969249489] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:24,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2687692] [2022-07-22 09:52:24,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:52:24,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:24,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:24,550 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) [2022-07-22 09:52:24,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 09:52:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:24,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 09:52:24,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:24,664 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 [2022-07-22 09:52:24,763 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 [2022-07-22 09:52:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:24,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:24,853 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:52:24,855 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:52:24,889 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:24,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2687692] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:24,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:24,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 27 [2022-07-22 09:52:24,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550667453] [2022-07-22 09:52:24,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:24,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 09:52:24,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:24,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 09:52:24,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-07-22 09:52:24,891 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:25,285 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2022-07-22 09:52:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 09:52:25,285 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-22 09:52:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:25,286 INFO L225 Difference]: With dead ends: 104 [2022-07-22 09:52:25,286 INFO L226 Difference]: Without dead ends: 102 [2022-07-22 09:52:25,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=1507, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 09:52:25,287 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 69 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:25,287 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 279 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:52:25,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-22 09:52:25,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 61. [2022-07-22 09:52:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 60 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-07-22 09:52:25,307 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 36 [2022-07-22 09:52:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:25,308 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-07-22 09:52:25,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-07-22 09:52:25,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 09:52:25,308 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:25,308 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:25,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:25,523 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 [2022-07-22 09:52:25,523 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:25,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:25,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1942581397, now seen corresponding path program 8 times [2022-07-22 09:52:25,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:25,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755526436] [2022-07-22 09:52:25,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:25,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 19 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:25,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:25,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755526436] [2022-07-22 09:52:25,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755526436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:25,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942481672] [2022-07-22 09:52:25,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:52:25,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:25,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:25,612 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) [2022-07-22 09:52:25,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 09:52:25,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:52:25,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:25,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 09:52:25,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:25,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:25,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942481672] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:25,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:25,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2022-07-22 09:52:25,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776814283] [2022-07-22 09:52:25,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:25,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 09:52:25,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:25,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 09:52:25,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-22 09:52:25,838 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:25,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:25,929 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-07-22 09:52:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 09:52:25,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-22 09:52:25,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:25,930 INFO L225 Difference]: With dead ends: 118 [2022-07-22 09:52:25,930 INFO L226 Difference]: Without dead ends: 91 [2022-07-22 09:52:25,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2022-07-22 09:52:25,931 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:25,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 62 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:52:25,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-22 09:52:25,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2022-07-22 09:52:25,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:25,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-07-22 09:52:25,937 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 40 [2022-07-22 09:52:25,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:25,937 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-07-22 09:52:25,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:25,938 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-07-22 09:52:25,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 09:52:25,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:25,938 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:25,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:26,164 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 [2022-07-22 09:52:26,164 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:26,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1050876070, now seen corresponding path program 9 times [2022-07-22 09:52:26,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:26,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404335081] [2022-07-22 09:52:26,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:26,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:26,327 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:26,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:26,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404335081] [2022-07-22 09:52:26,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404335081] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:26,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222247232] [2022-07-22 09:52:26,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:52:26,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:26,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:26,340 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) [2022-07-22 09:52:26,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 09:52:26,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 09:52:26,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 09:52:26,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:26,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:52:26,484 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:52:26,485 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 [2022-07-22 09:52:26,498 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:52:26,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:52:26,513 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:52:26,513 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 [2022-07-22 09:52:26,523 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:52:26,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:52:26,539 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:52:26,539 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 [2022-07-22 09:52:26,551 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:52:26,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:52:26,581 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:52:26,581 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:52:26,628 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 [2022-07-22 09:52:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 21 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:26,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:26,821 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:52:26,823 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 37 treesize of output 33 [2022-07-22 09:52:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 09:52:26,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222247232] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:26,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:26,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 13] total 21 [2022-07-22 09:52:26,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227322628] [2022-07-22 09:52:26,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:26,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 09:52:26,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:26,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 09:52:26,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2022-07-22 09:52:26,857 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:27,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:27,160 INFO L93 Difference]: Finished difference Result 105 states and 108 transitions. [2022-07-22 09:52:27,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 09:52:27,161 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-22 09:52:27,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:27,161 INFO L225 Difference]: With dead ends: 105 [2022-07-22 09:52:27,161 INFO L226 Difference]: Without dead ends: 103 [2022-07-22 09:52:27,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 67 SyntacticMatches, 21 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 09:52:27,162 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 52 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:27,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 195 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:52:27,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-22 09:52:27,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 53. [2022-07-22 09:52:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-07-22 09:52:27,168 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 44 [2022-07-22 09:52:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:27,168 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-07-22 09:52:27,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:27,169 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-07-22 09:52:27,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 09:52:27,169 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:27,169 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:27,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 09:52:27,385 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 [2022-07-22 09:52:27,386 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:27,386 INFO L85 PathProgramCache]: Analyzing trace with hash -470542059, now seen corresponding path program 10 times [2022-07-22 09:52:27,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:27,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408033337] [2022-07-22 09:52:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:27,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:27,566 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:27,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:27,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408033337] [2022-07-22 09:52:27,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408033337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:27,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653260091] [2022-07-22 09:52:27,567 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:52:27,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:27,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:27,568 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) [2022-07-22 09:52:27,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 09:52:27,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:52:27,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:27,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 09:52:27,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:27,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:52:27,696 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:52:27,697 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 [2022-07-22 09:52:27,712 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:52:27,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:52:27,734 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:52:27,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:52:27,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:52:27,868 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:27,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:46,111 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 20 treesize of output 18 [2022-07-22 09:52:46,117 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 [2022-07-22 09:52:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 1 proven. 82 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:46,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653260091] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:46,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:46,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 16] total 34 [2022-07-22 09:52:46,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012603787] [2022-07-22 09:52:46,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:46,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 09:52:46,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:46,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 09:52:46,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=968, Unknown=8, NotChecked=0, Total=1122 [2022-07-22 09:52:46,162 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:46,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:46,635 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-07-22 09:52:46,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 09:52:46,636 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-22 09:52:46,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:46,636 INFO L225 Difference]: With dead ends: 79 [2022-07-22 09:52:46,636 INFO L226 Difference]: Without dead ends: 77 [2022-07-22 09:52:46,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=302, Invalid=1946, Unknown=8, NotChecked=0, Total=2256 [2022-07-22 09:52:46,637 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:46,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 242 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 731 Invalid, 0 Unknown, 22 Unchecked, 0.3s Time] [2022-07-22 09:52:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-22 09:52:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 45. [2022-07-22 09:52:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-07-22 09:52:46,642 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2022-07-22 09:52:46,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:46,642 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-07-22 09:52:46,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-07-22 09:52:46,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 09:52:46,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:46,643 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:46,659 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-22 09:52:46,854 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 [2022-07-22 09:52:46,854 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:46,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:46,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 11 times [2022-07-22 09:52:46,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:46,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172492998] [2022-07-22 09:52:46,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:46,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:47,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:47,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172492998] [2022-07-22 09:52:47,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172492998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:47,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072436004] [2022-07-22 09:52:47,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:52:47,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:47,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:47,059 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) [2022-07-22 09:52:47,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 09:52:47,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 09:52:47,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:47,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 09:52:47,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:47,242 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 [2022-07-22 09:52:47,375 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 [2022-07-22 09:52:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:47,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:47,527 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:52:47,529 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:52:47,563 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:47,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072436004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:47,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:47,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 32 [2022-07-22 09:52:47,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332725811] [2022-07-22 09:52:47,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:47,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 09:52:47,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:47,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 09:52:47,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-07-22 09:52:47,565 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:48,121 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-07-22 09:52:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 09:52:48,121 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-22 09:52:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:48,122 INFO L225 Difference]: With dead ends: 96 [2022-07-22 09:52:48,122 INFO L226 Difference]: Without dead ends: 94 [2022-07-22 09:52:48,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=272, Invalid=2484, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 09:52:48,128 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:48,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 279 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:52:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-22 09:52:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 61. [2022-07-22 09:52:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-07-22 09:52:48,141 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 44 [2022-07-22 09:52:48,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:48,141 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-07-22 09:52:48,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.21875) internal successors, (103), 32 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-07-22 09:52:48,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-22 09:52:48,142 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:48,142 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:48,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-22 09:52:48,359 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 [2022-07-22 09:52:48,359 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:48,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:48,359 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 12 times [2022-07-22 09:52:48,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:48,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552634875] [2022-07-22 09:52:48,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:48,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:48,439 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:48,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:48,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552634875] [2022-07-22 09:52:48,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552634875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:48,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286471072] [2022-07-22 09:52:48,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:52:48,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:48,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:48,455 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) [2022-07-22 09:52:48,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 09:52:48,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 09:52:48,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:48,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 09:52:48,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:48,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:48,712 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:48,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286471072] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:48,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:48,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2022-07-22 09:52:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254168783] [2022-07-22 09:52:48,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:48,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 09:52:48,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 09:52:48,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:52:48,713 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:48,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:48,838 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2022-07-22 09:52:48,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 09:52:48,838 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-07-22 09:52:48,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:48,838 INFO L225 Difference]: With dead ends: 114 [2022-07-22 09:52:48,838 INFO L226 Difference]: Without dead ends: 83 [2022-07-22 09:52:48,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-07-22 09:52:48,839 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:48,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 88 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:52:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-22 09:52:48,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2022-07-22 09:52:48,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:48,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-07-22 09:52:48,846 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 48 [2022-07-22 09:52:48,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:48,846 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-07-22 09:52:48,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:48,847 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-07-22 09:52:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 09:52:48,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:48,847 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:48,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-22 09:52:49,050 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 [2022-07-22 09:52:49,050 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:49,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:49,050 INFO L85 PathProgramCache]: Analyzing trace with hash 730938950, now seen corresponding path program 13 times [2022-07-22 09:52:49,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:49,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996448168] [2022-07-22 09:52:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:49,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:49,286 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:49,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996448168] [2022-07-22 09:52:49,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996448168] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:49,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589473010] [2022-07-22 09:52:49,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:52:49,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:49,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:49,289 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) [2022-07-22 09:52:49,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 09:52:49,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:49,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 09:52:49,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:49,431 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:52:49,465 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:52:49,466 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 [2022-07-22 09:52:49,473 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:52:49,473 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:52:49,498 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:52:49,498 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:52:49,638 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 [2022-07-22 09:52:49,656 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:49,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:14,289 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_217| Int) (v_ArrVal_547 Int) (v_ArrVal_546 Int)) (or (<= 4 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_546) (+ (* |v_ULTIMATE.start_main_~i~0#1_217| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_547) (+ 16 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_217|)))) is different from false [2022-07-22 09:53:15,568 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 20 treesize of output 18 [2022-07-22 09:53:15,570 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 [2022-07-22 09:53:15,635 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 1 proven. 114 refuted. 2 times theorem prover too weak. 0 trivial. 6 not checked. [2022-07-22 09:53:15,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589473010] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:15,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:15,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 19] total 40 [2022-07-22 09:53:15,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814078437] [2022-07-22 09:53:15,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:15,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-22 09:53:15,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:15,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-22 09:53:15,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1323, Unknown=13, NotChecked=74, Total=1560 [2022-07-22 09:53:15,637 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 40 states, 40 states have (on average 3.175) internal successors, (127), 40 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:16,364 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2022-07-22 09:53:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 09:53:16,365 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.175) internal successors, (127), 40 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-22 09:53:16,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:16,365 INFO L225 Difference]: With dead ends: 91 [2022-07-22 09:53:16,365 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 09:53:16,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 77 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 887 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=362, Invalid=2935, Unknown=13, NotChecked=112, Total=3422 [2022-07-22 09:53:16,366 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 67 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:16,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 311 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 956 Invalid, 0 Unknown, 89 Unchecked, 0.4s Time] [2022-07-22 09:53:16,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 09:53:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 53. [2022-07-22 09:53:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-07-22 09:53:16,374 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2022-07-22 09:53:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:16,375 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-07-22 09:53:16,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.175) internal successors, (127), 40 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:16,376 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-07-22 09:53:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 09:53:16,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:16,376 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:16,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:16,593 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 [2022-07-22 09:53:16,593 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:16,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:16,594 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 14 times [2022-07-22 09:53:16,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:16,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466822208] [2022-07-22 09:53:16,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:16,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:16,757 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:16,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:16,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466822208] [2022-07-22 09:53:16,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466822208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:16,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341856842] [2022-07-22 09:53:16,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:53:16,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:16,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:16,758 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) [2022-07-22 09:53:16,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 09:53:16,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:53:16,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:16,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 09:53:16,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:16,895 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 [2022-07-22 09:53:17,019 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 [2022-07-22 09:53:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:17,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:17,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:53:17,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:53:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:17,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341856842] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:17,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:17,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 24 [2022-07-22 09:53:17,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719048477] [2022-07-22 09:53:17,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:17,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 09:53:17,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:17,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 09:53:17,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-07-22 09:53:17,162 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:17,624 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2022-07-22 09:53:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 09:53:17,625 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2022-07-22 09:53:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:17,625 INFO L225 Difference]: With dead ends: 108 [2022-07-22 09:53:17,625 INFO L226 Difference]: Without dead ends: 106 [2022-07-22 09:53:17,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=1784, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 09:53:17,626 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 67 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:17,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 285 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:53:17,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-07-22 09:53:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 69. [2022-07-22 09:53:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-07-22 09:53:17,643 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 52 [2022-07-22 09:53:17,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:17,644 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-07-22 09:53:17,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.2916666666666665) internal successors, (79), 24 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-07-22 09:53:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 09:53:17,644 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:17,644 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:17,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-22 09:53:17,859 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 [2022-07-22 09:53:17,859 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:17,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:17,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 15 times [2022-07-22 09:53:17,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:17,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818666433] [2022-07-22 09:53:17,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:17,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:17,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:17,959 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:17,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:17,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818666433] [2022-07-22 09:53:17,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818666433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:17,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831846527] [2022-07-22 09:53:17,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:53:17,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:17,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:17,961 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) [2022-07-22 09:53:17,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 09:53:18,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-22 09:53:18,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:18,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 09:53:18,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:18,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:18,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831846527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:18,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:18,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2022-07-22 09:53:18,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113816569] [2022-07-22 09:53:18,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:18,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 09:53:18,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:18,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 09:53:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:53:18,274 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:18,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:18,417 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2022-07-22 09:53:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 09:53:18,417 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2022-07-22 09:53:18,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:18,418 INFO L225 Difference]: With dead ends: 130 [2022-07-22 09:53:18,418 INFO L226 Difference]: Without dead ends: 95 [2022-07-22 09:53:18,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2022-07-22 09:53:18,419 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 104 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:18,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 108 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:53:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-22 09:53:18,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2022-07-22 09:53:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:18,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-07-22 09:53:18,427 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 56 [2022-07-22 09:53:18,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:18,427 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-07-22 09:53:18,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:18,428 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-07-22 09:53:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 09:53:18,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:18,428 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:18,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:18,647 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 [2022-07-22 09:53:18,647 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:18,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:18,648 INFO L85 PathProgramCache]: Analyzing trace with hash -2011531273, now seen corresponding path program 16 times [2022-07-22 09:53:18,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:18,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642221113] [2022-07-22 09:53:18,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:18,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:18,903 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:18,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:18,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642221113] [2022-07-22 09:53:18,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642221113] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195707375] [2022-07-22 09:53:18,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:53:18,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:18,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:18,906 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) [2022-07-22 09:53:18,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 09:53:18,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:53:18,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:18,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 09:53:18,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:19,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:53:19,060 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:53:19,060 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 [2022-07-22 09:53:19,071 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:19,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:19,104 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:19,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:19,221 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 [2022-07-22 09:53:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 3 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:19,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:19,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:53:19,411 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 37 treesize of output 33 [2022-07-22 09:53:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:53:19,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195707375] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:19,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:19,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19] total 27 [2022-07-22 09:53:19,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434360210] [2022-07-22 09:53:19,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:19,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 09:53:19,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:19,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 09:53:19,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-07-22 09:53:19,475 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:19,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:19,995 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2022-07-22 09:53:19,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 09:53:19,995 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-22 09:53:19,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:19,996 INFO L225 Difference]: With dead ends: 103 [2022-07-22 09:53:19,996 INFO L226 Difference]: Without dead ends: 101 [2022-07-22 09:53:19,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 16 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 09:53:19,997 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 64 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:19,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 297 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:53:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-22 09:53:20,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 61. [2022-07-22 09:53:20,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:20,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-07-22 09:53:20,005 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2022-07-22 09:53:20,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:20,005 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-07-22 09:53:20,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 27 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:20,006 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-07-22 09:53:20,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-22 09:53:20,006 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:20,006 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:20,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:20,214 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 [2022-07-22 09:53:20,214 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:20,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:20,215 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 17 times [2022-07-22 09:53:20,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:20,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739547038] [2022-07-22 09:53:20,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:20,483 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:20,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:20,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739547038] [2022-07-22 09:53:20,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739547038] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:20,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142502366] [2022-07-22 09:53:20,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:53:20,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:20,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:20,500 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) [2022-07-22 09:53:20,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 09:53:20,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-22 09:53:20,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:20,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 09:53:20,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:20,734 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 [2022-07-22 09:53:20,882 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 [2022-07-22 09:53:20,901 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:20,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:20,988 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:53:20,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:53:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:21,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142502366] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:21,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:21,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 26 [2022-07-22 09:53:21,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888704802] [2022-07-22 09:53:21,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:21,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 09:53:21,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:21,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 09:53:21,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-07-22 09:53:21,056 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:21,723 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2022-07-22 09:53:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 09:53:21,724 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2022-07-22 09:53:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:21,724 INFO L225 Difference]: With dead ends: 120 [2022-07-22 09:53:21,725 INFO L226 Difference]: Without dead ends: 118 [2022-07-22 09:53:21,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 102 SyntacticMatches, 11 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=2235, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 09:53:21,727 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:21,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 362 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 09:53:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-22 09:53:21,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2022-07-22 09:53:21,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:21,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-07-22 09:53:21,738 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 60 [2022-07-22 09:53:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:21,738 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-07-22 09:53:21,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 26 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-07-22 09:53:21,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-22 09:53:21,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:21,741 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:21,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:21,959 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 [2022-07-22 09:53:21,959 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:21,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:21,960 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 18 times [2022-07-22 09:53:21,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:21,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949404429] [2022-07-22 09:53:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:21,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:22,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:22,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949404429] [2022-07-22 09:53:22,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949404429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:22,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043954633] [2022-07-22 09:53:22,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:53:22,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:22,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:22,096 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) [2022-07-22 09:53:22,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 09:53:22,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-22 09:53:22,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:22,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-22 09:53:22,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:22,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:22,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043954633] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:22,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:22,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2022-07-22 09:53:22,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838621517] [2022-07-22 09:53:22,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:22,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 09:53:22,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:22,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 09:53:22,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-07-22 09:53:22,514 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:22,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:22,673 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2022-07-22 09:53:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 09:53:22,673 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-22 09:53:22,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:22,674 INFO L225 Difference]: With dead ends: 146 [2022-07-22 09:53:22,674 INFO L226 Difference]: Without dead ends: 107 [2022-07-22 09:53:22,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 09:53:22,675 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 167 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:22,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 106 Invalid, 248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:53:22,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-22 09:53:22,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2022-07-22 09:53:22,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:22,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-07-22 09:53:22,685 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 64 [2022-07-22 09:53:22,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:22,685 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-07-22 09:53:22,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:22,685 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-07-22 09:53:22,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 09:53:22,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:22,685 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:22,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:22,902 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 [2022-07-22 09:53:22,902 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:22,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:22,903 INFO L85 PathProgramCache]: Analyzing trace with hash -846428632, now seen corresponding path program 19 times [2022-07-22 09:53:22,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:22,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302347983] [2022-07-22 09:53:22,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:22,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:23,167 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:23,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:23,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302347983] [2022-07-22 09:53:23,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302347983] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:23,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953569534] [2022-07-22 09:53:23,167 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:53:23,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:23,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:23,169 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) [2022-07-22 09:53:23,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 09:53:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:23,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 09:53:23,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:23,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:53:23,391 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:53:23,391 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 [2022-07-22 09:53:23,402 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:23,403 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:23,448 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:23,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:23,623 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 [2022-07-22 09:53:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 3 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:23,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:23,859 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 21 treesize of output 19 [2022-07-22 09:53:23,862 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 37 treesize of output 33 [2022-07-22 09:53:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:53:23,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953569534] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:23,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:23,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 21] total 31 [2022-07-22 09:53:23,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519101864] [2022-07-22 09:53:23,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:23,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 09:53:23,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:23,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 09:53:23,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-07-22 09:53:23,928 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:24,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:24,595 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2022-07-22 09:53:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 09:53:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-22 09:53:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:24,596 INFO L225 Difference]: With dead ends: 115 [2022-07-22 09:53:24,596 INFO L226 Difference]: Without dead ends: 113 [2022-07-22 09:53:24,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 113 SyntacticMatches, 15 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 09:53:24,597 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 79 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 1210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:24,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 372 Invalid, 1210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 09:53:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-22 09:53:24,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2022-07-22 09:53:24,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-07-22 09:53:24,612 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 68 [2022-07-22 09:53:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:24,612 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-07-22 09:53:24,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 31 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:24,613 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-07-22 09:53:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 09:53:24,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:24,613 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:24,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:24,828 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 [2022-07-22 09:53:24,829 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:24,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:24,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1370939875, now seen corresponding path program 20 times [2022-07-22 09:53:24,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:24,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343764758] [2022-07-22 09:53:24,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:24,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:24,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:25,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:25,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343764758] [2022-07-22 09:53:25,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343764758] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:25,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254348648] [2022-07-22 09:53:25,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:53:25,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:25,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:25,078 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) [2022-07-22 09:53:25,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 09:53:25,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:53:25,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:25,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 09:53:25,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:25,241 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 [2022-07-22 09:53:25,422 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 [2022-07-22 09:53:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:25,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:25,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:53:25,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:53:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 0 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:25,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254348648] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:25,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:25,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 29 [2022-07-22 09:53:25,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028636384] [2022-07-22 09:53:25,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:25,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 09:53:25,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:25,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 09:53:25,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-07-22 09:53:25,666 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:26,215 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2022-07-22 09:53:26,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 09:53:26,223 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 0 states have call successors, (0), 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 68 [2022-07-22 09:53:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:26,224 INFO L225 Difference]: With dead ends: 132 [2022-07-22 09:53:26,224 INFO L226 Difference]: Without dead ends: 130 [2022-07-22 09:53:26,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 117 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=2839, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 09:53:26,227 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 88 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:26,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 378 Invalid, 1211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:53:26,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-22 09:53:26,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 85. [2022-07-22 09:53:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:26,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-07-22 09:53:26,254 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 68 [2022-07-22 09:53:26,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:26,254 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-07-22 09:53:26,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 29 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:26,254 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-07-22 09:53:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-07-22 09:53:26,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:26,258 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:26,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-22 09:53:26,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:26,475 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:26,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:26,475 INFO L85 PathProgramCache]: Analyzing trace with hash -20883879, now seen corresponding path program 21 times [2022-07-22 09:53:26,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:26,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681141012] [2022-07-22 09:53:26,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:26,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:26,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:26,616 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:26,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:26,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681141012] [2022-07-22 09:53:26,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681141012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:26,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224649319] [2022-07-22 09:53:26,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:53:26,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:26,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:26,619 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:26,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 09:53:26,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 09:53:26,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:26,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 09:53:26,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:26,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:27,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224649319] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:27,008 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:27,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2022-07-22 09:53:27,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595818111] [2022-07-22 09:53:27,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:27,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-22 09:53:27,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:27,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-22 09:53:27,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2022-07-22 09:53:27,009 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:27,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:27,197 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2022-07-22 09:53:27,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 09:53:27,198 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2022-07-22 09:53:27,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:27,198 INFO L225 Difference]: With dead ends: 162 [2022-07-22 09:53:27,198 INFO L226 Difference]: Without dead ends: 119 [2022-07-22 09:53:27,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=1182, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 09:53:27,199 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 144 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:27,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 136 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:53:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-22 09:53:27,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 85. [2022-07-22 09:53:27,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 84 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:27,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-07-22 09:53:27,216 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 72 [2022-07-22 09:53:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:27,216 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-07-22 09:53:27,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.7419354838709675) internal successors, (116), 31 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:27,217 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-07-22 09:53:27,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 09:53:27,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:27,217 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:27,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:27,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:27,432 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:27,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:27,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1199298343, now seen corresponding path program 22 times [2022-07-22 09:53:27,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:27,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554815634] [2022-07-22 09:53:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:27,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:27,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:27,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:27,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554815634] [2022-07-22 09:53:27,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554815634] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:27,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548168489] [2022-07-22 09:53:27,677 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:53:27,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:27,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:27,678 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:27,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 09:53:27,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:53:27,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:27,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 09:53:27,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:27,826 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:53:27,865 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:53:27,865 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 [2022-07-22 09:53:27,872 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:27,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:27,894 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:27,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:28,046 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 [2022-07-22 09:53:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 3 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:28,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:28,264 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:53:28,266 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 37 treesize of output 33 [2022-07-22 09:53:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:53:28,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548168489] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:28,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:28,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 34 [2022-07-22 09:53:28,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890070216] [2022-07-22 09:53:28,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:28,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 09:53:28,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:28,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 09:53:28,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1010, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 09:53:28,353 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:29,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:29,140 INFO L93 Difference]: Finished difference Result 127 states and 129 transitions. [2022-07-22 09:53:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 09:53:29,140 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 0 states have call successors, (0), 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 76 [2022-07-22 09:53:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:29,141 INFO L225 Difference]: With dead ends: 127 [2022-07-22 09:53:29,141 INFO L226 Difference]: Without dead ends: 125 [2022-07-22 09:53:29,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 128 SyntacticMatches, 15 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 09:53:29,142 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 70 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 1474 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:29,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 495 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 09:53:29,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-22 09:53:29,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 77. [2022-07-22 09:53:29,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:29,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2022-07-22 09:53:29,156 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 76 [2022-07-22 09:53:29,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:29,156 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2022-07-22 09:53:29,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5) internal successors, (119), 34 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:29,157 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2022-07-22 09:53:29,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 09:53:29,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:29,157 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:29,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:29,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 09:53:29,374 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:29,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:29,374 INFO L85 PathProgramCache]: Analyzing trace with hash 609496852, now seen corresponding path program 23 times [2022-07-22 09:53:29,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:29,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495404024] [2022-07-22 09:53:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:29,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:29,651 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:29,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:29,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495404024] [2022-07-22 09:53:29,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495404024] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:29,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927434688] [2022-07-22 09:53:29,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:53:29,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:29,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:29,653 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:29,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 09:53:29,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-22 09:53:29,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:29,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 09:53:29,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:29,948 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 [2022-07-22 09:53:30,208 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 [2022-07-22 09:53:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:30,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:30,283 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:53:30,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:53:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:30,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927434688] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:30,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:30,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 33 [2022-07-22 09:53:30,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911086302] [2022-07-22 09:53:30,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:30,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 09:53:30,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:30,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 09:53:30,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=961, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 09:53:30,348 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:30,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:30,976 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2022-07-22 09:53:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-22 09:53:30,977 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 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 76 [2022-07-22 09:53:30,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:30,977 INFO L225 Difference]: With dead ends: 144 [2022-07-22 09:53:30,977 INFO L226 Difference]: Without dead ends: 142 [2022-07-22 09:53:30,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 132 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-07-22 09:53:30,979 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 96 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:30,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 526 Invalid, 1680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 09:53:30,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-22 09:53:31,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 93. [2022-07-22 09:53:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-07-22 09:53:31,004 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 76 [2022-07-22 09:53:31,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:31,004 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-07-22 09:53:31,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.484848484848485) internal successors, (115), 33 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:31,004 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-07-22 09:53:31,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 09:53:31,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:31,005 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:31,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:31,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 09:53:31,223 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:31,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:31,223 INFO L85 PathProgramCache]: Analyzing trace with hash 2057478922, now seen corresponding path program 24 times [2022-07-22 09:53:31,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:31,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777258944] [2022-07-22 09:53:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:31,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:31,388 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 129 proven. 186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:31,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:31,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777258944] [2022-07-22 09:53:31,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777258944] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:31,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364307299] [2022-07-22 09:53:31,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:53:31,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:31,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:31,400 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:31,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 09:53:31,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-07-22 09:53:31,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:31,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 09:53:31,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:31,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:32,038 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 162 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:32,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364307299] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:32,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:32,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2022-07-22 09:53:32,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415025645] [2022-07-22 09:53:32,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:32,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 09:53:32,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:32,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 09:53:32,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=844, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 09:53:32,040 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:32,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:32,264 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2022-07-22 09:53:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 09:53:32,265 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2022-07-22 09:53:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:32,265 INFO L225 Difference]: With dead ends: 178 [2022-07-22 09:53:32,266 INFO L226 Difference]: Without dead ends: 131 [2022-07-22 09:53:32,266 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=454, Invalid=1438, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 09:53:32,267 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 143 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:32,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 176 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:53:32,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-22 09:53:32,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2022-07-22 09:53:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:32,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-07-22 09:53:32,285 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 80 [2022-07-22 09:53:32,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:32,285 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-07-22 09:53:32,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.764705882352941) internal successors, (128), 34 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:32,285 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-07-22 09:53:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 09:53:32,286 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:32,286 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:32,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:32,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 09:53:32,504 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:32,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:32,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1640095734, now seen corresponding path program 25 times [2022-07-22 09:53:32,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:32,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872592566] [2022-07-22 09:53:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:32,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 359 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:32,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:32,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872592566] [2022-07-22 09:53:32,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872592566] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:32,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839046772] [2022-07-22 09:53:32,769 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:53:32,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:32,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:32,770 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:32,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-22 09:53:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:32,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 09:53:32,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:32,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:53:33,009 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:53:33,010 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 [2022-07-22 09:53:33,021 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:33,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:33,057 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:33,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:33,299 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 [2022-07-22 09:53:33,322 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 3 proven. 356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:33,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:33,572 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:53:33,574 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 37 treesize of output 33 [2022-07-22 09:53:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 358 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:53:33,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839046772] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:33,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:33,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 25] total 37 [2022-07-22 09:53:33,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352021714] [2022-07-22 09:53:33,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:33,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-22 09:53:33,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:33,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-22 09:53:33,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 09:53:33,668 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 37 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 37 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:34,501 INFO L93 Difference]: Finished difference Result 139 states and 141 transitions. [2022-07-22 09:53:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 09:53:34,502 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 37 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-07-22 09:53:34,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:34,502 INFO L225 Difference]: With dead ends: 139 [2022-07-22 09:53:34,502 INFO L226 Difference]: Without dead ends: 137 [2022-07-22 09:53:34,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 143 SyntacticMatches, 15 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=277, Invalid=3263, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 09:53:34,509 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 88 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 1640 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:34,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 584 Invalid, 1738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1640 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 09:53:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-22 09:53:34,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 85. [2022-07-22 09:53:34,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:34,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-07-22 09:53:34,526 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 84 [2022-07-22 09:53:34,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:34,526 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-07-22 09:53:34,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5405405405405403) internal successors, (131), 37 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:34,526 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-07-22 09:53:34,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-22 09:53:34,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:34,526 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:34,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:34,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-22 09:53:34,739 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:34,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:34,739 INFO L85 PathProgramCache]: Analyzing trace with hash -103116603, now seen corresponding path program 26 times [2022-07-22 09:53:34,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:34,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023877241] [2022-07-22 09:53:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:34,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:34,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:35,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:35,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023877241] [2022-07-22 09:53:35,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023877241] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:35,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249836867] [2022-07-22 09:53:35,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:53:35,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:35,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:35,057 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:35,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-22 09:53:35,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:53:35,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:35,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 09:53:35,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:35,254 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:53:35,758 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-22 09:53:35,758 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 21 treesize of output 10 [2022-07-22 09:53:35,782 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:35,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:36,072 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:53:36,073 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:53:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:36,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249836867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:36,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:36,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-07-22 09:53:36,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036280043] [2022-07-22 09:53:36,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:36,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-22 09:53:36,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:36,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-22 09:53:36,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2096, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 09:53:36,126 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 48 states, 48 states have (on average 3.4791666666666665) internal successors, (167), 48 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:37,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:37,203 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2022-07-22 09:53:37,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-22 09:53:37,204 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.4791666666666665) internal successors, (167), 48 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2022-07-22 09:53:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:37,204 INFO L225 Difference]: With dead ends: 156 [2022-07-22 09:53:37,204 INFO L226 Difference]: Without dead ends: 154 [2022-07-22 09:53:37,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 141 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1765 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=476, Invalid=7356, Unknown=0, NotChecked=0, Total=7832 [2022-07-22 09:53:37,206 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 104 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 2414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:37,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 774 Invalid, 2414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2080 Invalid, 0 Unknown, 217 Unchecked, 0.5s Time] [2022-07-22 09:53:37,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-22 09:53:37,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 101. [2022-07-22 09:53:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:37,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-07-22 09:53:37,226 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 84 [2022-07-22 09:53:37,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:37,226 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-07-22 09:53:37,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.4791666666666665) internal successors, (167), 48 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:37,227 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-07-22 09:53:37,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-22 09:53:37,227 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:37,227 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:37,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:37,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:37,443 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:37,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:37,444 INFO L85 PathProgramCache]: Analyzing trace with hash 2110702651, now seen corresponding path program 27 times [2022-07-22 09:53:37,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:37,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774055284] [2022-07-22 09:53:37,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:37,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 163 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:37,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:37,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774055284] [2022-07-22 09:53:37,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774055284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:37,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658678416] [2022-07-22 09:53:37,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:53:37,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:37,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:37,591 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:37,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-22 09:53:37,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-22 09:53:37,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:37,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 09:53:37,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:38,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:38,318 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:38,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658678416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:38,319 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:38,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 37 [2022-07-22 09:53:38,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924224541] [2022-07-22 09:53:38,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:38,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-22 09:53:38,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:38,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-22 09:53:38,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 09:53:38,320 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:38,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:38,556 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2022-07-22 09:53:38,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 09:53:38,557 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 0 states have call successors, (0), 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 88 [2022-07-22 09:53:38,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:38,557 INFO L225 Difference]: With dead ends: 194 [2022-07-22 09:53:38,557 INFO L226 Difference]: Without dead ends: 143 [2022-07-22 09:53:38,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=537, Invalid=1719, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 09:53:38,559 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 236 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:38,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 142 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:53:38,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-22 09:53:38,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 101. [2022-07-22 09:53:38,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:38,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-07-22 09:53:38,579 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 88 [2022-07-22 09:53:38,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:38,579 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-07-22 09:53:38,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:38,579 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-07-22 09:53:38,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-22 09:53:38,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:38,580 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:38,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:38,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:38,794 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:38,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:38,794 INFO L85 PathProgramCache]: Analyzing trace with hash 479669179, now seen corresponding path program 28 times [2022-07-22 09:53:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:38,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787435816] [2022-07-22 09:53:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:38,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:38,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:39,137 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:39,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:39,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787435816] [2022-07-22 09:53:39,137 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787435816] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:39,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165163848] [2022-07-22 09:53:39,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:53:39,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:39,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:39,139 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:39,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-22 09:53:39,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:53:39,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:39,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 09:53:39,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:39,370 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:53:39,402 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:53:39,402 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 [2022-07-22 09:53:39,411 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:39,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:39,460 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:39,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:39,733 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 [2022-07-22 09:53:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 3 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:39,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:39,956 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 21 treesize of output 19 [2022-07-22 09:53:39,958 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 37 treesize of output 33 [2022-07-22 09:53:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 437 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:53:40,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165163848] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:40,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:40,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 27] total 40 [2022-07-22 09:53:40,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735646789] [2022-07-22 09:53:40,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:40,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-22 09:53:40,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:40,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-22 09:53:40,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1428, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 09:53:40,060 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:40,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:40,897 INFO L93 Difference]: Finished difference Result 151 states and 153 transitions. [2022-07-22 09:53:40,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 09:53:40,897 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-22 09:53:40,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:40,898 INFO L225 Difference]: With dead ends: 151 [2022-07-22 09:53:40,898 INFO L226 Difference]: Without dead ends: 149 [2022-07-22 09:53:40,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 15 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=3861, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 09:53:40,899 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 87 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 1894 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:40,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 633 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1894 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 09:53:40,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-22 09:53:40,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 93. [2022-07-22 09:53:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-07-22 09:53:40,921 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 92 [2022-07-22 09:53:40,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:40,921 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-07-22 09:53:40,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.575) internal successors, (143), 40 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-07-22 09:53:40,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-07-22 09:53:40,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:40,922 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:40,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:41,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-22 09:53:41,127 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:41,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:41,128 INFO L85 PathProgramCache]: Analyzing trace with hash 2126956278, now seen corresponding path program 29 times [2022-07-22 09:53:41,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:41,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089494482] [2022-07-22 09:53:41,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:41,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:41,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:41,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:41,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089494482] [2022-07-22 09:53:41,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089494482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:41,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891747975] [2022-07-22 09:53:41,460 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:53:41,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:41,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:41,461 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:41,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-22 09:53:41,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-22 09:53:41,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:41,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 09:53:41,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:41,834 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 [2022-07-22 09:53:42,029 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 [2022-07-22 09:53:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:42,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:42,145 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:53:42,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:53:42,226 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:42,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891747975] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:42,227 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:42,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 38 [2022-07-22 09:53:42,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306648404] [2022-07-22 09:53:42,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:42,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 09:53:42,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:42,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 09:53:42,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 09:53:42,228 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 38 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 38 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:43,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:43,067 INFO L93 Difference]: Finished difference Result 168 states and 171 transitions. [2022-07-22 09:53:43,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-22 09:53:43,068 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 38 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2022-07-22 09:53:43,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:43,068 INFO L225 Difference]: With dead ends: 168 [2022-07-22 09:53:43,068 INFO L226 Difference]: Without dead ends: 166 [2022-07-22 09:53:43,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 162 SyntacticMatches, 11 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=319, Invalid=5083, Unknown=0, NotChecked=0, Total=5402 [2022-07-22 09:53:43,070 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 114 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 2285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:43,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 717 Invalid, 2285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 2159 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 09:53:43,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-22 09:53:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 109. [2022-07-22 09:53:43,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:43,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-07-22 09:53:43,101 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 92 [2022-07-22 09:53:43,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:43,102 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-07-22 09:53:43,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6578947368421053) internal successors, (139), 38 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:43,102 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-07-22 09:53:43,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-22 09:53:43,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:43,103 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:43,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:43,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:43,321 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:43,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:43,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1469941268, now seen corresponding path program 30 times [2022-07-22 09:53:43,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:43,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808058627] [2022-07-22 09:53:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:43,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 201 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:43,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:43,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808058627] [2022-07-22 09:53:43,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808058627] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:43,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437607899] [2022-07-22 09:53:43,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:53:43,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:43,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:43,528 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:43,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-22 09:53:43,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-22 09:53:43,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:43,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 09:53:43,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:44,287 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:44,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 242 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:44,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437607899] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:44,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:44,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2022-07-22 09:53:44,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136476911] [2022-07-22 09:53:44,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:44,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-22 09:53:44,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:44,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-22 09:53:44,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1180, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 09:53:44,390 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 40 states, 40 states have (on average 3.8) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:44,678 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2022-07-22 09:53:44,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 09:53:44,678 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.8) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 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 96 [2022-07-22 09:53:44,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:44,679 INFO L225 Difference]: With dead ends: 210 [2022-07-22 09:53:44,679 INFO L226 Difference]: Without dead ends: 155 [2022-07-22 09:53:44,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=627, Invalid=2025, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 09:53:44,680 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 293 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:44,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 163 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:53:44,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-22 09:53:44,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 109. [2022-07-22 09:53:44,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0277777777777777) internal successors, (111), 108 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:44,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-07-22 09:53:44,704 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 96 [2022-07-22 09:53:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:44,705 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-07-22 09:53:44,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.8) internal successors, (152), 40 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:44,705 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-07-22 09:53:44,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-22 09:53:44,708 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:44,708 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:44,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:44,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:44,926 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:44,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:44,926 INFO L85 PathProgramCache]: Analyzing trace with hash -905180180, now seen corresponding path program 31 times [2022-07-22 09:53:44,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:44,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514392622] [2022-07-22 09:53:44,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:44,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:44,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:45,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:45,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514392622] [2022-07-22 09:53:45,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514392622] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:45,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863238806] [2022-07-22 09:53:45,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:53:45,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:45,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:45,291 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:45,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-22 09:53:45,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-22 09:53:45,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:45,550 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:53:45,575 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:53:45,576 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 [2022-07-22 09:53:45,583 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:45,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:45,608 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:45,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:45,819 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 [2022-07-22 09:53:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 3 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:45,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:45,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:53:45,998 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 37 treesize of output 33 [2022-07-22 09:53:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 0 proven. 524 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:53:46,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863238806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:46,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:46,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 43 [2022-07-22 09:53:46,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762403509] [2022-07-22 09:53:46,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:46,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 09:53:46,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:46,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 09:53:46,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1664, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 09:53:46,074 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:46,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:46,993 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2022-07-22 09:53:46,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-22 09:53:46,994 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 0 states have call successors, (0), 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 100 [2022-07-22 09:53:46,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:46,994 INFO L225 Difference]: With dead ends: 163 [2022-07-22 09:53:46,994 INFO L226 Difference]: Without dead ends: 161 [2022-07-22 09:53:46,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 173 SyntacticMatches, 15 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=321, Invalid=4509, Unknown=0, NotChecked=0, Total=4830 [2022-07-22 09:53:46,995 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 100 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 2555 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 2665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 2555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:46,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 820 Invalid, 2665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 2555 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 09:53:46,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-22 09:53:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 101. [2022-07-22 09:53:47,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2022-07-22 09:53:47,031 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 100 [2022-07-22 09:53:47,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:47,031 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2022-07-22 09:53:47,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.604651162790698) internal successors, (155), 43 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2022-07-22 09:53:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-07-22 09:53:47,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:47,032 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:47,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-22 09:53:47,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-22 09:53:47,248 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:47,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:47,248 INFO L85 PathProgramCache]: Analyzing trace with hash 137728423, now seen corresponding path program 32 times [2022-07-22 09:53:47,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:47,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770575447] [2022-07-22 09:53:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:47,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:47,647 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:47,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:47,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770575447] [2022-07-22 09:53:47,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770575447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:47,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311144564] [2022-07-22 09:53:47,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:53:47,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:47,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:47,649 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:47,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-22 09:53:47,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:53:47,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:47,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 09:53:47,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:47,922 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 [2022-07-22 09:53:48,295 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 [2022-07-22 09:53:48,320 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:48,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:48,426 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:53:48,428 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:53:48,550 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 0 proven. 518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:48,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311144564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:48,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:48,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 41 [2022-07-22 09:53:48,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114484448] [2022-07-22 09:53:48,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:48,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 09:53:48,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:48,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 09:53:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 09:53:48,551 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 41 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:49,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:49,972 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2022-07-22 09:53:49,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-22 09:53:49,972 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 states have internal predecessors, (151), 0 states have call successors, (0), 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 100 [2022-07-22 09:53:49,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:49,973 INFO L225 Difference]: With dead ends: 180 [2022-07-22 09:53:49,973 INFO L226 Difference]: Without dead ends: 178 [2022-07-22 09:53:49,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 177 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=345, Invalid=5975, Unknown=0, NotChecked=0, Total=6320 [2022-07-22 09:53:49,974 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 120 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 2370 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 2506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 2370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:49,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 801 Invalid, 2506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 2370 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 09:53:49,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-22 09:53:50,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 117. [2022-07-22 09:53:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:50,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-07-22 09:53:50,003 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 100 [2022-07-22 09:53:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:50,003 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-07-22 09:53:50,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.682926829268293) internal successors, (151), 41 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-07-22 09:53:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-22 09:53:50,004 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:50,004 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:50,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-07-22 09:53:50,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-22 09:53:50,226 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:50,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:50,226 INFO L85 PathProgramCache]: Analyzing trace with hash -216366051, now seen corresponding path program 33 times [2022-07-22 09:53:50,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:50,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480659557] [2022-07-22 09:53:50,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:50,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 243 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:50,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:50,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480659557] [2022-07-22 09:53:50,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480659557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:50,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046683885] [2022-07-22 09:53:50,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:53:50,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:50,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:50,459 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:50,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-22 09:53:51,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-22 09:53:51,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:51,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 09:53:51,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 288 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:51,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:51,561 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 288 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:51,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046683885] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:51,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:51,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2022-07-22 09:53:51,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582058146] [2022-07-22 09:53:51,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 09:53:51,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:51,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 09:53:51,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=1369, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 09:53:51,566 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 43 states, 43 states have (on average 3.813953488372093) internal successors, (164), 43 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:51,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:51,873 INFO L93 Difference]: Finished difference Result 226 states and 229 transitions. [2022-07-22 09:53:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 09:53:51,874 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.813953488372093) internal successors, (164), 43 states have internal predecessors, (164), 0 states have call successors, (0), 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 104 [2022-07-22 09:53:51,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:51,874 INFO L225 Difference]: With dead ends: 226 [2022-07-22 09:53:51,874 INFO L226 Difference]: Without dead ends: 167 [2022-07-22 09:53:51,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=724, Invalid=2356, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 09:53:51,876 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 266 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:51,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 172 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:53:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-22 09:53:51,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 117. [2022-07-22 09:53:51,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:51,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2022-07-22 09:53:51,908 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 104 [2022-07-22 09:53:51,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:51,909 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2022-07-22 09:53:51,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.813953488372093) internal successors, (164), 43 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:51,909 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2022-07-22 09:53:51,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-22 09:53:51,909 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:51,909 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:51,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:52,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-22 09:53:52,128 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:52,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:52,129 INFO L85 PathProgramCache]: Analyzing trace with hash -440827747, now seen corresponding path program 34 times [2022-07-22 09:53:52,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:52,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764886439] [2022-07-22 09:53:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:52,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 620 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:52,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:52,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764886439] [2022-07-22 09:53:52,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764886439] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:52,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290326085] [2022-07-22 09:53:52,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:53:52,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:52,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:52,555 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:52,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-22 09:53:52,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:53:52,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:52,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 09:53:52,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:52,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:53:52,851 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:53:52,851 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 [2022-07-22 09:53:52,861 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:52,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:52,916 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:53:52,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:53:53,286 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 [2022-07-22 09:53:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 3 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:53,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:53,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:53:53,512 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 37 treesize of output 33 [2022-07-22 09:53:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 0 proven. 619 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:53:53,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290326085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:53,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:53,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 45 [2022-07-22 09:53:53,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874109312] [2022-07-22 09:53:53,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:53,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 09:53:53,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:53,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 09:53:53,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1835, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 09:53:53,600 INFO L87 Difference]: Start difference. First operand 117 states and 119 transitions. Second operand has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 45 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:54,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:54,683 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2022-07-22 09:53:54,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-22 09:53:54,684 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 45 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-22 09:53:54,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:54,685 INFO L225 Difference]: With dead ends: 175 [2022-07-22 09:53:54,685 INFO L226 Difference]: Without dead ends: 173 [2022-07-22 09:53:54,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 188 SyntacticMatches, 16 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=336, Invalid=5066, Unknown=0, NotChecked=0, Total=5402 [2022-07-22 09:53:54,686 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 85 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 2801 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 2904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:54,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 970 Invalid, 2904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2801 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 09:53:54,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-22 09:53:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 109. [2022-07-22 09:53:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-07-22 09:53:54,751 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 108 [2022-07-22 09:53:54,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:54,751 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-07-22 09:53:54,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 45 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-07-22 09:53:54,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-22 09:53:54,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:54,752 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:54,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:54,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:54,969 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:54,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:54,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1138995416, now seen corresponding path program 35 times [2022-07-22 09:53:54,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:54,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255267468] [2022-07-22 09:53:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:54,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:55,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:55,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255267468] [2022-07-22 09:53:55,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255267468] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:55,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764899419] [2022-07-22 09:53:55,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:53:55,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:55,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:55,586 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:55,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-22 09:53:56,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-22 09:53:56,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:56,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-22 09:53:56,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:56,328 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 [2022-07-22 09:53:56,725 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 [2022-07-22 09:53:56,745 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:56,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:57,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:53:57,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:53:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:57,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764899419] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:57,273 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:57,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 72 [2022-07-22 09:53:57,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976436841] [2022-07-22 09:53:57,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:57,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-22 09:53:57,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:57,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-22 09:53:57,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4832, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 09:53:57,275 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 72 states, 72 states have (on average 3.6527777777777777) internal successors, (263), 72 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:59,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:59,317 INFO L93 Difference]: Finished difference Result 192 states and 195 transitions. [2022-07-22 09:53:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-22 09:53:59,318 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.6527777777777777) internal successors, (263), 72 states have internal predecessors, (263), 0 states have call successors, (0), 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 108 [2022-07-22 09:53:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:59,318 INFO L225 Difference]: With dead ends: 192 [2022-07-22 09:53:59,318 INFO L226 Difference]: Without dead ends: 190 [2022-07-22 09:53:59,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 166 SyntacticMatches, 9 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4387 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=584, Invalid=12298, Unknown=0, NotChecked=0, Total=12882 [2022-07-22 09:53:59,320 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 172 mSDsluCounter, 1274 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 3713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 3529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:59,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1310 Invalid, 3713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 09:53:59,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-22 09:53:59,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 125. [2022-07-22 09:53:59,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:59,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-07-22 09:53:59,355 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 108 [2022-07-22 09:53:59,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:59,355 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-07-22 09:53:59,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.6527777777777777) internal successors, (263), 72 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:59,356 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-07-22 09:53:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-22 09:53:59,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:59,356 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:59,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:59,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-22 09:53:59,571 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:59,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:59,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1599316686, now seen corresponding path program 36 times [2022-07-22 09:53:59,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:59,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662379127] [2022-07-22 09:53:59,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:59,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:59,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:59,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:59,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662379127] [2022-07-22 09:53:59,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662379127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:59,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176002041] [2022-07-22 09:53:59,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:53:59,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:59,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:59,772 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:53:59,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-22 09:54:00,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-22 09:54:00,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:54:00,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 09:54:00,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:00,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:01,030 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:01,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176002041] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:54:01,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:54:01,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2022-07-22 09:54:01,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683625424] [2022-07-22 09:54:01,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:54:01,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-22 09:54:01,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:54:01,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-22 09:54:01,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=1572, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 09:54:01,032 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:01,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:01,382 INFO L93 Difference]: Finished difference Result 242 states and 245 transitions. [2022-07-22 09:54:01,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 09:54:01,382 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 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 112 [2022-07-22 09:54:01,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:01,383 INFO L225 Difference]: With dead ends: 242 [2022-07-22 09:54:01,383 INFO L226 Difference]: Without dead ends: 179 [2022-07-22 09:54:01,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=828, Invalid=2712, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 09:54:01,384 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 221 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:01,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 261 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:54:01,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-22 09:54:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 125. [2022-07-22 09:54:01,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2022-07-22 09:54:01,418 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 112 [2022-07-22 09:54:01,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:01,419 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2022-07-22 09:54:01,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.8260869565217392) internal successors, (176), 46 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:01,419 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2022-07-22 09:54:01,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-22 09:54:01,419 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:01,420 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:01,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-22 09:54:01,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-22 09:54:01,638 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:54:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:54:01,639 INFO L85 PathProgramCache]: Analyzing trace with hash 123488718, now seen corresponding path program 37 times [2022-07-22 09:54:01,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:54:01,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879176982] [2022-07-22 09:54:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:54:01,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:54:01,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 723 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:02,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:54:02,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879176982] [2022-07-22 09:54:02,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879176982] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:54:02,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058480805] [2022-07-22 09:54:02,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:54:02,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:02,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:54:02,301 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:54:02,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-22 09:54:02,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:02,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-22 09:54:02,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:02,774 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:54:02,841 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:54:02,841 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 [2022-07-22 09:54:02,851 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:54:02,851 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:54:02,893 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:54:02,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:54:03,387 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 [2022-07-22 09:54:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 3 proven. 720 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:03,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:05,796 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1146| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1146|)) (forall ((v_ArrVal_2579 Int)) (<= 12 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1146| 4)) v_ArrVal_2579) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)))))) is different from false [2022-07-22 09:54:38,006 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_1147| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1147|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_1146| Int) (v_ArrVal_2577 Int) (v_ArrVal_2576 Int) (v_ArrVal_2579 Int)) (or (<= 12 (select (store (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_1147| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_2576) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2577)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1146| 4)) v_ArrVal_2579) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_1147| 1) |v_ULTIMATE.start_main_~i~0#1_1146|)))))) is different from false [2022-07-22 09:54:38,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 36 [2022-07-22 09:54:38,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 790 treesize of output 782 [2022-07-22 09:54:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 0 proven. 663 refuted. 33 times theorem prover too weak. 0 trivial. 27 not checked. [2022-07-22 09:54:38,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058480805] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:54:38,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:54:38,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 35] total 81 [2022-07-22 09:54:38,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401126264] [2022-07-22 09:54:38,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:54:38,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-22 09:54:38,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:54:38,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-22 09:54:38,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=5739, Unknown=77, NotChecked=310, Total=6480 [2022-07-22 09:54:38,383 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 81 states, 81 states have (on average 3.5555555555555554) internal successors, (288), 81 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:41,174 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (<= .cse0 48) (forall ((|v_ULTIMATE.start_main_~i~0#1_1147| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1147|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_1146| Int) (v_ArrVal_2577 Int) (v_ArrVal_2576 Int) (v_ArrVal_2579 Int)) (or (<= 12 (select (store (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_1147| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_2576) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_2577)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1146| 4)) v_ArrVal_2579) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_1147| 1) |v_ULTIMATE.start_main_~i~0#1_1146|)))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= 12 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) .cse0) 12))) is different from false [2022-07-22 09:54:43,226 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (= 12 (select .cse0 48)) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= (+ (div (+ 48 (* (- 1) |c_ULTIMATE.start_main_~a~0#1.offset|)) 4) 1) |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_1146| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1146|)) (forall ((v_ArrVal_2579 Int)) (<= 12 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1146| 4)) v_ArrVal_2579) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)))))))) is different from false [2022-07-22 09:54:45,357 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (= 12 (select .cse0 48)) (<= 14 |c_ULTIMATE.start_main_~i~0#1|) (<= 12 (select .cse0 (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= (+ (div (+ 48 (* (- 1) |c_ULTIMATE.start_main_~a~0#1.offset|)) 4) 1) |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_1146| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_1146|)) (forall ((v_ArrVal_2579 Int)) (<= 12 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_1146| 4)) v_ArrVal_2579) (+ 48 |c_ULTIMATE.start_main_~a~0#1.offset|)))))))) is different from false [2022-07-22 09:54:46,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:46,015 INFO L93 Difference]: Finished difference Result 187 states and 189 transitions. [2022-07-22 09:54:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 09:54:46,015 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.5555555555555554) internal successors, (288), 81 states have internal predecessors, (288), 0 states have call successors, (0), 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 116 [2022-07-22 09:54:46,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:46,016 INFO L225 Difference]: With dead ends: 187 [2022-07-22 09:54:46,016 INFO L226 Difference]: Without dead ends: 185 [2022-07-22 09:54:46,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 189 SyntacticMatches, 9 SemanticMatches, 112 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 4003 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=637, Invalid=11075, Unknown=80, NotChecked=1090, Total=12882 [2022-07-22 09:54:46,018 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 154 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 3316 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1370 SdHoareTripleChecker+Invalid, 3789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 3316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:46,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1370 Invalid, 3789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 3316 Invalid, 0 Unknown, 332 Unchecked, 0.9s Time] [2022-07-22 09:54:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-22 09:54:46,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 117. [2022-07-22 09:54:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:46,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-07-22 09:54:46,054 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 116 [2022-07-22 09:54:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:46,054 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-07-22 09:54:46,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.5555555555555554) internal successors, (288), 81 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:46,054 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-07-22 09:54:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-22 09:54:46,055 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:46,055 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:46,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-22 09:54:46,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:46,264 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:54:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:54:46,265 INFO L85 PathProgramCache]: Analyzing trace with hash -399645559, now seen corresponding path program 38 times [2022-07-22 09:54:46,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:54:46,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965023193] [2022-07-22 09:54:46,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:54:46,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:54:46,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:46,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:54:46,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965023193] [2022-07-22 09:54:46,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965023193] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:54:46,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48981944] [2022-07-22 09:54:46,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:54:46,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:46,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:54:46,885 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:54:46,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-22 09:54:47,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:54:47,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:54:47,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 09:54:47,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:47,149 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 [2022-07-22 09:54:47,449 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 [2022-07-22 09:54:47,470 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:47,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:47,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:54:47,554 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:54:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 716 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:47,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48981944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:54:47,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:54:47,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 47 [2022-07-22 09:54:47,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5383603] [2022-07-22 09:54:47,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:54:47,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 09:54:47,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:54:47,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 09:54:47,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 09:54:47,652 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 47 states, 47 states have (on average 3.723404255319149) internal successors, (175), 47 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:49,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:49,410 INFO L93 Difference]: Finished difference Result 204 states and 207 transitions. [2022-07-22 09:54:49,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-07-22 09:54:49,410 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.723404255319149) internal successors, (175), 47 states have internal predecessors, (175), 0 states have call successors, (0), 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 116 [2022-07-22 09:54:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:49,416 INFO L225 Difference]: With dead ends: 204 [2022-07-22 09:54:49,416 INFO L226 Difference]: Without dead ends: 202 [2022-07-22 09:54:49,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 207 SyntacticMatches, 11 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=397, Invalid=7975, Unknown=0, NotChecked=0, Total=8372 [2022-07-22 09:54:49,417 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 132 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 3338 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 3494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 3338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:49,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 1084 Invalid, 3494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 3338 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 09:54:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-22 09:54:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 133. [2022-07-22 09:54:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-07-22 09:54:49,458 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 116 [2022-07-22 09:54:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:49,459 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-07-22 09:54:49,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.723404255319149) internal successors, (175), 47 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-07-22 09:54:49,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-22 09:54:49,459 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:49,459 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:49,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-22 09:54:49,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-22 09:54:49,677 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:54:49,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:54:49,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1492478465, now seen corresponding path program 39 times [2022-07-22 09:54:49,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:54:49,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173446994] [2022-07-22 09:54:49,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:54:49,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:54:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:49,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:54:49,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173446994] [2022-07-22 09:54:49,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173446994] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:54:49,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46013310] [2022-07-22 09:54:49,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:54:49,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:49,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:54:49,963 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:54:49,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-22 09:54:50,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-22 09:54:50,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:54:50,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 09:54:50,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:51,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:51,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46013310] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:54:51,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:54:51,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 49 [2022-07-22 09:54:51,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509618479] [2022-07-22 09:54:51,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:54:51,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-22 09:54:51,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:54:51,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-22 09:54:51,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=1789, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 09:54:51,411 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 49 states, 49 states have (on average 3.836734693877551) internal successors, (188), 49 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:51,794 INFO L93 Difference]: Finished difference Result 258 states and 261 transitions. [2022-07-22 09:54:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 09:54:51,794 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.836734693877551) internal successors, (188), 49 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2022-07-22 09:54:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:51,795 INFO L225 Difference]: With dead ends: 258 [2022-07-22 09:54:51,795 INFO L226 Difference]: Without dead ends: 191 [2022-07-22 09:54:51,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1053 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=939, Invalid=3093, Unknown=0, NotChecked=0, Total=4032 [2022-07-22 09:54:51,796 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 284 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:51,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 264 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:54:51,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-22 09:54:51,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 133. [2022-07-22 09:54:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2022-07-22 09:54:51,843 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 120 [2022-07-22 09:54:51,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:51,843 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2022-07-22 09:54:51,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.836734693877551) internal successors, (188), 49 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:51,844 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2022-07-22 09:54:51,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-22 09:54:51,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:51,844 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:51,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-22 09:54:52,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:52,063 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:54:52,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:54:52,064 INFO L85 PathProgramCache]: Analyzing trace with hash -816765057, now seen corresponding path program 40 times [2022-07-22 09:54:52,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:54:52,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969854678] [2022-07-22 09:54:52,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:54:52,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:54:52,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:52,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:54:52,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969854678] [2022-07-22 09:54:52,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969854678] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:54:52,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641882937] [2022-07-22 09:54:52,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:54:52,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:52,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:54:52,627 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:54:52,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-22 09:54:52,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:54:52,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:54:52,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-22 09:54:52,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:52,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:54:53,011 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:54:53,012 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 [2022-07-22 09:54:53,020 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:54:53,020 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:54:53,071 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:54:53,071 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:54:53,555 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 [2022-07-22 09:54:53,576 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 3 proven. 831 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:53,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:53,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:54:53,778 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 37 treesize of output 33 [2022-07-22 09:54:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 834 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:54:53,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641882937] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:54:53,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:54:53,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 35] total 52 [2022-07-22 09:54:53,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714626151] [2022-07-22 09:54:53,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:54:53,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 09:54:53,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:54:53,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 09:54:53,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2480, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 09:54:53,928 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 52 states, 52 states have (on average 3.673076923076923) internal successors, (191), 52 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:55,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:55,546 INFO L93 Difference]: Finished difference Result 199 states and 201 transitions. [2022-07-22 09:54:55,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-22 09:54:55,547 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.673076923076923) internal successors, (191), 52 states have internal predecessors, (191), 0 states have call successors, (0), 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 124 [2022-07-22 09:54:55,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:55,547 INFO L225 Difference]: With dead ends: 199 [2022-07-22 09:54:55,547 INFO L226 Difference]: Without dead ends: 197 [2022-07-22 09:54:55,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 218 SyntacticMatches, 15 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=387, Invalid=6753, Unknown=0, NotChecked=0, Total=7140 [2022-07-22 09:54:55,548 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 85 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 3811 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 3922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:55,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1230 Invalid, 3922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3811 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 09:54:55,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-22 09:54:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 125. [2022-07-22 09:54:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2022-07-22 09:54:55,591 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 124 [2022-07-22 09:54:55,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:55,592 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2022-07-22 09:54:55,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.673076923076923) internal successors, (191), 52 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:55,592 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2022-07-22 09:54:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-22 09:54:55,592 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:55,593 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:55,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-22 09:54:55,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:55,810 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:54:55,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:54:55,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1678830778, now seen corresponding path program 41 times [2022-07-22 09:54:55,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:54:55,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741073724] [2022-07-22 09:54:55,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:54:55,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:54:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:56,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:54:56,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741073724] [2022-07-22 09:54:56,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741073724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:54:56,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938862287] [2022-07-22 09:54:56,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:54:56,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:56,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:54:56,396 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:54:56,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-22 09:54:56,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-22 09:54:56,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:54:56,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-22 09:54:56,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:57,136 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 [2022-07-22 09:54:57,648 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 [2022-07-22 09:54:57,678 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:57,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:57,809 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:54:57,811 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:54:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 827 backedges. 0 proven. 827 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:57,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938862287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:54:57,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:54:57,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 50 [2022-07-22 09:54:57,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135286719] [2022-07-22 09:54:57,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:54:57,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 09:54:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:54:57,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 09:54:57,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 09:54:57,962 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 50 states, 50 states have (on average 3.74) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:59,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:59,876 INFO L93 Difference]: Finished difference Result 216 states and 219 transitions. [2022-07-22 09:54:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-22 09:54:59,876 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.74) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2022-07-22 09:54:59,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:59,877 INFO L225 Difference]: With dead ends: 216 [2022-07-22 09:54:59,877 INFO L226 Difference]: Without dead ends: 214 [2022-07-22 09:54:59,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 222 SyntacticMatches, 11 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2158 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=423, Invalid=9083, Unknown=0, NotChecked=0, Total=9506 [2022-07-22 09:54:59,879 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 146 mSDsluCounter, 1283 mSDsCounter, 0 mSdLazyCounter, 3797 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 3967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 3797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:59,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1323 Invalid, 3967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 3797 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-22 09:54:59,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-07-22 09:54:59,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 141. [2022-07-22 09:54:59,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:59,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-07-22 09:54:59,928 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 124 [2022-07-22 09:54:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:59,928 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-07-22 09:54:59,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.74) internal successors, (187), 50 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:59,928 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-07-22 09:54:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-22 09:54:59,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:59,929 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:59,948 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-22 09:55:00,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-22 09:55:00,148 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:00,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:00,148 INFO L85 PathProgramCache]: Analyzing trace with hash -321118800, now seen corresponding path program 42 times [2022-07-22 09:55:00,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:00,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188483218] [2022-07-22 09:55:00,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:00,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 393 proven. 492 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:00,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:00,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188483218] [2022-07-22 09:55:00,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188483218] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:00,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768646668] [2022-07-22 09:55:00,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:55:00,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:00,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:00,404 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:00,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-22 09:55:02,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-07-22 09:55:02,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:55:02,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 09:55:02,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:02,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:03,056 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:03,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768646668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:03,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:03,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 52 [2022-07-22 09:55:03,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36497505] [2022-07-22 09:55:03,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:03,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 09:55:03,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:03,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 09:55:03,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=2020, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 09:55:03,060 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:03,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:03,501 INFO L93 Difference]: Finished difference Result 274 states and 277 transitions. [2022-07-22 09:55:03,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 09:55:03,501 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 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 128 [2022-07-22 09:55:03,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:03,502 INFO L225 Difference]: With dead ends: 274 [2022-07-22 09:55:03,502 INFO L226 Difference]: Without dead ends: 203 [2022-07-22 09:55:03,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1057, Invalid=3499, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 09:55:03,504 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 305 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:03,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 288 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:55:03,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-22 09:55:03,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 141. [2022-07-22 09:55:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:03,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2022-07-22 09:55:03,553 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 128 [2022-07-22 09:55:03,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:03,553 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2022-07-22 09:55:03,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.8461538461538463) internal successors, (200), 52 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:03,553 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2022-07-22 09:55:03,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-22 09:55:03,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:03,554 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:03,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-07-22 09:55:03,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-22 09:55:03,774 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:03,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:03,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1768629840, now seen corresponding path program 43 times [2022-07-22 09:55:03,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:03,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324431030] [2022-07-22 09:55:03,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:03,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:03,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:04,389 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:04,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:04,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324431030] [2022-07-22 09:55:04,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324431030] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:04,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889450413] [2022-07-22 09:55:04,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:55:04,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:04,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:04,393 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:04,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-22 09:55:04,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:04,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-22 09:55:04,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:04,761 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:55:04,804 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:55:04,804 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 [2022-07-22 09:55:04,814 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:55:04,814 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:55:04,856 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:55:04,857 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:55:05,399 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 [2022-07-22 09:55:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 3 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:05,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:05,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:55:05,726 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 37 treesize of output 33 [2022-07-22 09:55:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 0 proven. 952 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:55:05,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889450413] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:05,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:05,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 37] total 55 [2022-07-22 09:55:05,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382103723] [2022-07-22 09:55:05,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:05,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-22 09:55:05,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:05,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-22 09:55:05,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2788, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 09:55:05,878 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand has 55 states, 55 states have (on average 3.690909090909091) internal successors, (203), 55 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:07,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:07,918 INFO L93 Difference]: Finished difference Result 211 states and 213 transitions. [2022-07-22 09:55:07,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-22 09:55:07,919 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.690909090909091) internal successors, (203), 55 states have internal predecessors, (203), 0 states have call successors, (0), 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 132 [2022-07-22 09:55:07,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:07,919 INFO L225 Difference]: With dead ends: 211 [2022-07-22 09:55:07,920 INFO L226 Difference]: Without dead ends: 209 [2022-07-22 09:55:07,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 233 SyntacticMatches, 15 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1746 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=409, Invalid=7601, Unknown=0, NotChecked=0, Total=8010 [2022-07-22 09:55:07,921 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 104 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 4459 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 1438 SdHoareTripleChecker+Invalid, 4582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 4459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:07,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 1438 Invalid, 4582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 4459 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 09:55:07,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-22 09:55:07,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 133. [2022-07-22 09:55:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:07,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-07-22 09:55:07,976 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 132 [2022-07-22 09:55:07,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:07,977 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-07-22 09:55:07,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.690909090909091) internal successors, (203), 55 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:07,977 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-07-22 09:55:07,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-07-22 09:55:07,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:07,977 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:07,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-22 09:55:08,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-22 09:55:08,195 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:08,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:08,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1893103253, now seen corresponding path program 44 times [2022-07-22 09:55:08,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:08,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583475677] [2022-07-22 09:55:08,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:08,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:08,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:08,741 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:08,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:08,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583475677] [2022-07-22 09:55:08,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583475677] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:08,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387637170] [2022-07-22 09:55:08,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:55:08,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:08,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:08,743 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:08,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-22 09:55:08,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:55:08,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:55:08,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-22 09:55:08,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:09,140 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 [2022-07-22 09:55:09,634 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 [2022-07-22 09:55:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:09,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:09,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:55:09,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:55:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:09,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387637170] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:09,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:09,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 53 [2022-07-22 09:55:09,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887967920] [2022-07-22 09:55:09,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:09,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 09:55:09,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:09,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 09:55:09,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 09:55:09,882 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 53 states, 53 states have (on average 3.7547169811320753) internal successors, (199), 53 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:11,999 INFO L93 Difference]: Finished difference Result 228 states and 231 transitions. [2022-07-22 09:55:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-22 09:55:11,999 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.7547169811320753) internal successors, (199), 53 states have internal predecessors, (199), 0 states have call successors, (0), 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 132 [2022-07-22 09:55:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:12,000 INFO L225 Difference]: With dead ends: 228 [2022-07-22 09:55:12,000 INFO L226 Difference]: Without dead ends: 226 [2022-07-22 09:55:12,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 237 SyntacticMatches, 11 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=449, Invalid=10263, Unknown=0, NotChecked=0, Total=10712 [2022-07-22 09:55:12,002 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 148 mSDsluCounter, 1450 mSDsCounter, 0 mSdLazyCounter, 4516 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 4694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 4516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:12,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1492 Invalid, 4694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 4516 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 09:55:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-07-22 09:55:12,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 149. [2022-07-22 09:55:12,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:12,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2022-07-22 09:55:12,073 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 132 [2022-07-22 09:55:12,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:12,073 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2022-07-22 09:55:12,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.7547169811320753) internal successors, (199), 53 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:12,074 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2022-07-22 09:55:12,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-07-22 09:55:12,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:12,074 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:12,093 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-22 09:55:12,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:12,292 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1812265441, now seen corresponding path program 45 times [2022-07-22 09:55:12,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:12,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493516212] [2022-07-22 09:55:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:12,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:12,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:12,576 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 451 proven. 557 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:12,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:12,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493516212] [2022-07-22 09:55:12,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493516212] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:12,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636217885] [2022-07-22 09:55:12,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:55:12,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:12,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:12,578 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:12,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-22 09:55:14,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-07-22 09:55:14,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:55:14,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 09:55:14,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 512 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:15,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 512 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:15,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636217885] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:15,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:15,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 55 [2022-07-22 09:55:15,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117674996] [2022-07-22 09:55:15,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:15,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-22 09:55:15,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:15,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-22 09:55:15,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=2265, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 09:55:15,481 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 55 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 55 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:15,957 INFO L93 Difference]: Finished difference Result 290 states and 293 transitions. [2022-07-22 09:55:15,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 09:55:15,958 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 55 states have internal predecessors, (212), 0 states have call successors, (0), 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 136 [2022-07-22 09:55:15,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:15,958 INFO L225 Difference]: With dead ends: 290 [2022-07-22 09:55:15,958 INFO L226 Difference]: Without dead ends: 215 [2022-07-22 09:55:15,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1182, Invalid=3930, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 09:55:15,961 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 308 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:15,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 304 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:55:15,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-07-22 09:55:16,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 149. [2022-07-22 09:55:16,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:16,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2022-07-22 09:55:16,018 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 136 [2022-07-22 09:55:16,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:16,018 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2022-07-22 09:55:16,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.8545454545454545) internal successors, (212), 55 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:16,019 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2022-07-22 09:55:16,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-22 09:55:16,019 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:16,020 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:16,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-22 09:55:16,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-22 09:55:16,235 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:16,236 INFO L85 PathProgramCache]: Analyzing trace with hash 516169825, now seen corresponding path program 46 times [2022-07-22 09:55:16,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:16,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337205209] [2022-07-22 09:55:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:16,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:16,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:16,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337205209] [2022-07-22 09:55:16,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337205209] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:16,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886022047] [2022-07-22 09:55:16,895 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:55:16,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:16,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:16,897 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:16,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-22 09:55:17,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:55:17,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:55:17,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-22 09:55:17,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:17,292 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:55:17,318 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:55:17,319 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 [2022-07-22 09:55:17,328 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:55:17,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:55:17,362 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:55:17,363 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:55:17,805 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 [2022-07-22 09:55:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 3 proven. 1077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:17,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:18,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:55:18,070 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 37 treesize of output 33 [2022-07-22 09:55:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1079 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:55:18,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886022047] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:18,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:18,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 39] total 57 [2022-07-22 09:55:18,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342359247] [2022-07-22 09:55:18,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:18,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-22 09:55:18,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:18,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-22 09:55:18,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3007, Unknown=0, NotChecked=0, Total=3192 [2022-07-22 09:55:18,231 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 57 states, 57 states have (on average 3.736842105263158) internal successors, (213), 57 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:20,330 INFO L93 Difference]: Finished difference Result 223 states and 225 transitions. [2022-07-22 09:55:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-07-22 09:55:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.736842105263158) internal successors, (213), 57 states have internal predecessors, (213), 0 states have call successors, (0), 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 140 [2022-07-22 09:55:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:20,331 INFO L225 Difference]: With dead ends: 223 [2022-07-22 09:55:20,332 INFO L226 Difference]: Without dead ends: 221 [2022-07-22 09:55:20,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 248 SyntacticMatches, 16 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1846 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=424, Invalid=8318, Unknown=0, NotChecked=0, Total=8742 [2022-07-22 09:55:20,332 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 146 mSDsluCounter, 1409 mSDsCounter, 0 mSdLazyCounter, 4356 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 4524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 4356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:20,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1452 Invalid, 4524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 4356 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 09:55:20,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-22 09:55:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 141. [2022-07-22 09:55:20,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-07-22 09:55:20,392 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 140 [2022-07-22 09:55:20,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:20,393 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-07-22 09:55:20,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.736842105263158) internal successors, (213), 57 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:20,393 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-07-22 09:55:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-07-22 09:55:20,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:20,394 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:20,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-07-22 09:55:20,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-22 09:55:20,612 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1505000092, now seen corresponding path program 47 times [2022-07-22 09:55:20,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:20,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564181689] [2022-07-22 09:55:20,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:20,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:20,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:21,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:21,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:21,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564181689] [2022-07-22 09:55:21,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564181689] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:21,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532964392] [2022-07-22 09:55:21,436 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:55:21,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:21,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:21,441 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:21,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-22 09:55:22,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-07-22 09:55:22,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:55:22,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-22 09:55:22,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:23,340 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 [2022-07-22 09:55:24,209 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 [2022-07-22 09:55:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:24,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:25,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:55:25,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:55:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1073 backedges. 0 proven. 1073 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:25,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532964392] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:25,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:25,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 92 [2022-07-22 09:55:25,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180399667] [2022-07-22 09:55:25,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:25,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-22 09:55:25,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:25,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-22 09:55:25,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=8092, Unknown=0, NotChecked=0, Total=8372 [2022-07-22 09:55:25,481 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 92 states, 92 states have (on average 3.7282608695652173) internal successors, (343), 92 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:28,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:28,954 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2022-07-22 09:55:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-07-22 09:55:28,954 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.7282608695652173) internal successors, (343), 92 states have internal predecessors, (343), 0 states have call successors, (0), 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 140 [2022-07-22 09:55:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:28,955 INFO L225 Difference]: With dead ends: 240 [2022-07-22 09:55:28,955 INFO L226 Difference]: Without dead ends: 238 [2022-07-22 09:55:28,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 216 SyntacticMatches, 11 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5889 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=836, Invalid=24924, Unknown=0, NotChecked=0, Total=25760 [2022-07-22 09:55:28,957 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 182 mSDsluCounter, 1967 mSDsCounter, 0 mSdLazyCounter, 6007 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2011 SdHoareTripleChecker+Invalid, 6239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 6007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:28,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 2011 Invalid, 6239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 6007 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 09:55:28,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-22 09:55:29,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 157. [2022-07-22 09:55:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:29,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-07-22 09:55:29,022 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 140 [2022-07-22 09:55:29,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:29,022 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-07-22 09:55:29,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.7282608695652173) internal successors, (343), 92 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-07-22 09:55:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-22 09:55:29,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:29,024 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:29,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-22 09:55:29,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:29,240 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:29,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:29,240 INFO L85 PathProgramCache]: Analyzing trace with hash 677505682, now seen corresponding path program 48 times [2022-07-22 09:55:29,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:29,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333558777] [2022-07-22 09:55:29,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:29,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 513 proven. 626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:29,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:29,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333558777] [2022-07-22 09:55:29,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333558777] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:29,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136039194] [2022-07-22 09:55:29,636 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:55:29,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:29,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:29,638 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:29,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-22 09:55:32,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-22 09:55:32,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:55:32,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 09:55:32,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 578 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:33,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 578 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:33,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136039194] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:33,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:33,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2022-07-22 09:55:33,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542668715] [2022-07-22 09:55:33,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:33,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-22 09:55:33,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:33,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-22 09:55:33,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=2524, Unknown=0, NotChecked=0, Total=3306 [2022-07-22 09:55:33,323 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 58 states, 58 states have (on average 3.8620689655172415) internal successors, (224), 58 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:33,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:33,834 INFO L93 Difference]: Finished difference Result 306 states and 309 transitions. [2022-07-22 09:55:33,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-22 09:55:33,835 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.8620689655172415) internal successors, (224), 58 states have internal predecessors, (224), 0 states have call successors, (0), 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 144 [2022-07-22 09:55:33,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:33,836 INFO L225 Difference]: With dead ends: 306 [2022-07-22 09:55:33,836 INFO L226 Difference]: Without dead ends: 227 [2022-07-22 09:55:33,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1314, Invalid=4386, Unknown=0, NotChecked=0, Total=5700 [2022-07-22 09:55:33,837 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 359 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:33,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 309 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:55:33,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-22 09:55:33,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 157. [2022-07-22 09:55:33,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2022-07-22 09:55:33,913 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 144 [2022-07-22 09:55:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:33,914 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2022-07-22 09:55:33,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.8620689655172415) internal successors, (224), 58 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:33,914 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2022-07-22 09:55:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-22 09:55:33,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:33,915 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:33,935 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-07-22 09:55:34,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-22 09:55:34,135 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:34,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1109113746, now seen corresponding path program 49 times [2022-07-22 09:55:34,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:34,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705503414] [2022-07-22 09:55:34,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:34,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:34,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 0 proven. 1215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:34,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:34,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705503414] [2022-07-22 09:55:34,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705503414] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:34,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111866709] [2022-07-22 09:55:34,914 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:55:34,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:34,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:34,916 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:34,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-22 09:55:35,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:35,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-22 09:55:35,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:35,330 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:55:35,378 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:55:35,378 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 [2022-07-22 09:55:35,387 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:55:35,388 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:55:35,433 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:55:35,433 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:55:36,103 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 [2022-07-22 09:55:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 3 proven. 1212 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:36,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:36,448 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:55:36,450 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 37 treesize of output 33 [2022-07-22 09:55:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1215 backedges. 0 proven. 1214 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:55:36,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111866709] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:36,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:36,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 41] total 61 [2022-07-22 09:55:36,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566266909] [2022-07-22 09:55:36,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:36,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-22 09:55:36,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:36,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-22 09:55:36,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=3458, Unknown=0, NotChecked=0, Total=3660 [2022-07-22 09:55:36,633 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 61 states, 61 states have (on average 3.721311475409836) internal successors, (227), 61 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:38,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:38,863 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2022-07-22 09:55:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-07-22 09:55:38,863 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.721311475409836) internal successors, (227), 61 states have internal predecessors, (227), 0 states have call successors, (0), 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 148 [2022-07-22 09:55:38,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:38,864 INFO L225 Difference]: With dead ends: 235 [2022-07-22 09:55:38,864 INFO L226 Difference]: Without dead ends: 233 [2022-07-22 09:55:38,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 263 SyntacticMatches, 15 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=453, Invalid=9447, Unknown=0, NotChecked=0, Total=9900 [2022-07-22 09:55:38,865 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 146 mSDsluCounter, 1676 mSDsCounter, 0 mSdLazyCounter, 4836 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 5007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 4836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:38,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1721 Invalid, 5007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 4836 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 09:55:38,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-22 09:55:38,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 149. [2022-07-22 09:55:38,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:38,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2022-07-22 09:55:38,937 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 148 [2022-07-22 09:55:38,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:38,937 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2022-07-22 09:55:38,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.721311475409836) internal successors, (227), 61 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:38,938 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2022-07-22 09:55:38,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-07-22 09:55:38,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:38,938 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:38,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-07-22 09:55:39,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:39,156 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:39,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:39,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2089713741, now seen corresponding path program 50 times [2022-07-22 09:55:39,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:39,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668852359] [2022-07-22 09:55:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:39,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:39,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:39,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668852359] [2022-07-22 09:55:39,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668852359] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:39,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315715415] [2022-07-22 09:55:39,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:55:39,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:39,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:39,734 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:39,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-22 09:55:40,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:55:40,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:55:40,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-22 09:55:40,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:40,175 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 [2022-07-22 09:55:40,722 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 [2022-07-22 09:55:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:40,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:40,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:55:40,918 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:55:41,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 0 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:41,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315715415] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:41,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:41,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 60 [2022-07-22 09:55:41,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075962966] [2022-07-22 09:55:41,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:41,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-22 09:55:41,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:41,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-22 09:55:41,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3364, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 09:55:41,122 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 60 states, 60 states have (on average 3.716666666666667) internal successors, (223), 60 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:43,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:43,911 INFO L93 Difference]: Finished difference Result 252 states and 255 transitions. [2022-07-22 09:55:43,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-22 09:55:43,912 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.716666666666667) internal successors, (223), 60 states have internal predecessors, (223), 0 states have call successors, (0), 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 148 [2022-07-22 09:55:43,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:43,912 INFO L225 Difference]: With dead ends: 252 [2022-07-22 09:55:43,912 INFO L226 Difference]: Without dead ends: 250 [2022-07-22 09:55:43,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 267 SyntacticMatches, 10 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=508, Invalid=13064, Unknown=0, NotChecked=0, Total=13572 [2022-07-22 09:55:43,914 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 166 mSDsluCounter, 1698 mSDsCounter, 0 mSdLazyCounter, 5349 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 5551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 5349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:43,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 1744 Invalid, 5551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 5349 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 09:55:43,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-22 09:55:43,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 165. [2022-07-22 09:55:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-07-22 09:55:43,988 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 148 [2022-07-22 09:55:43,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:43,988 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-07-22 09:55:43,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.716666666666667) internal successors, (223), 60 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:43,989 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-07-22 09:55:43,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-22 09:55:43,989 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:43,989 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:44,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-22 09:55:44,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-22 09:55:44,193 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:44,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1636847677, now seen corresponding path program 51 times [2022-07-22 09:55:44,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:44,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245185847] [2022-07-22 09:55:44,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:44,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:44,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 579 proven. 699 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:44,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:44,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245185847] [2022-07-22 09:55:44,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245185847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:44,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814614125] [2022-07-22 09:55:44,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:55:44,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:44,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:44,804 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:44,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-22 09:55:47,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-07-22 09:55:47,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:55:48,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 09:55:48,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 648 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:48,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 648 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:48,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814614125] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:48,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:48,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 61 [2022-07-22 09:55:48,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186444935] [2022-07-22 09:55:48,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:48,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-22 09:55:48,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:48,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-22 09:55:48,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=2797, Unknown=0, NotChecked=0, Total=3660 [2022-07-22 09:55:48,860 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 61 states, 61 states have (on average 3.8688524590163933) internal successors, (236), 61 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:49,474 INFO L93 Difference]: Finished difference Result 322 states and 325 transitions. [2022-07-22 09:55:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 09:55:49,474 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.8688524590163933) internal successors, (236), 61 states have internal predecessors, (236), 0 states have call successors, (0), 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 152 [2022-07-22 09:55:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:49,475 INFO L225 Difference]: With dead ends: 322 [2022-07-22 09:55:49,475 INFO L226 Difference]: Without dead ends: 239 [2022-07-22 09:55:49,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1453, Invalid=4867, Unknown=0, NotChecked=0, Total=6320 [2022-07-22 09:55:49,479 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 352 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:49,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 421 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:55:49,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-22 09:55:49,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 165. [2022-07-22 09:55:49,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0182926829268293) internal successors, (167), 164 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:49,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2022-07-22 09:55:49,557 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 152 [2022-07-22 09:55:49,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:49,557 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2022-07-22 09:55:49,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.8688524590163933) internal successors, (236), 61 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:49,558 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2022-07-22 09:55:49,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-22 09:55:49,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:49,558 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:49,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-22 09:55:49,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-22 09:55:49,764 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:49,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:49,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1552389309, now seen corresponding path program 52 times [2022-07-22 09:55:49,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:49,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385934535] [2022-07-22 09:55:49,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:49,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 1358 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:50,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:50,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385934535] [2022-07-22 09:55:50,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385934535] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:50,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526957282] [2022-07-22 09:55:50,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:55:50,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:50,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:50,631 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:50,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-22 09:55:50,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:55:50,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:55:50,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-22 09:55:50,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:51,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:55:51,119 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:55:51,119 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 [2022-07-22 09:55:51,129 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:55:51,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:55:51,177 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:55:51,177 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:55:51,944 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 [2022-07-22 09:55:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 3 proven. 1355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:51,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:52,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:55:52,305 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 37 treesize of output 33 [2022-07-22 09:55:52,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1358 backedges. 0 proven. 1357 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:55:52,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526957282] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:52,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:52,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 43] total 64 [2022-07-22 09:55:52,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253089140] [2022-07-22 09:55:52,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:52,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-22 09:55:52,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:52,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-22 09:55:52,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3820, Unknown=0, NotChecked=0, Total=4032 [2022-07-22 09:55:52,484 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 64 states, 64 states have (on average 3.734375) internal successors, (239), 64 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:54,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:55:54,848 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2022-07-22 09:55:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-22 09:55:54,848 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.734375) internal successors, (239), 64 states have internal predecessors, (239), 0 states have call successors, (0), 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 156 [2022-07-22 09:55:54,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:55:54,849 INFO L225 Difference]: With dead ends: 247 [2022-07-22 09:55:54,849 INFO L226 Difference]: Without dead ends: 245 [2022-07-22 09:55:54,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 278 SyntacticMatches, 15 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2322 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=475, Invalid=10445, Unknown=0, NotChecked=0, Total=10920 [2022-07-22 09:55:54,851 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 148 mSDsluCounter, 1842 mSDsCounter, 0 mSdLazyCounter, 5309 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 1889 SdHoareTripleChecker+Invalid, 5485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 5309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:55:54,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 1889 Invalid, 5485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 5309 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 09:55:54,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-07-22 09:55:54,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 157. [2022-07-22 09:55:54,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-07-22 09:55:54,934 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 156 [2022-07-22 09:55:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:55:54,934 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-07-22 09:55:54,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.734375) internal successors, (239), 64 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:55:54,935 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-07-22 09:55:54,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-22 09:55:54,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:55:54,935 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:55:54,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-07-22 09:55:55,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:55,148 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:55:55,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:55:55,149 INFO L85 PathProgramCache]: Analyzing trace with hash 691296894, now seen corresponding path program 53 times [2022-07-22 09:55:55,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:55:55,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046871329] [2022-07-22 09:55:55,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:55:55,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:55:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:55:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 0 proven. 1351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:56,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:55:56,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046871329] [2022-07-22 09:55:56,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046871329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:55:56,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840704934] [2022-07-22 09:55:56,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:55:56,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:55:56,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:55:56,141 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:55:56,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-22 09:55:58,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-22 09:55:58,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:55:58,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-22 09:55:58,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:55:58,224 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 [2022-07-22 09:55:58,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-22 09:55:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 0 proven. 1351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:58,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:55:58,983 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:55:58,984 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:55:59,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1351 backedges. 0 proven. 1351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:55:59,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840704934] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:55:59,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:55:59,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 63 [2022-07-22 09:55:59,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936610218] [2022-07-22 09:55:59,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:55:59,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-22 09:55:59,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:55:59,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-22 09:55:59,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3721, Unknown=0, NotChecked=0, Total=3906 [2022-07-22 09:55:59,167 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 63 states, 63 states have (on average 3.7301587301587302) internal successors, (235), 63 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:56:02,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:56:02,443 INFO L93 Difference]: Finished difference Result 264 states and 267 transitions. [2022-07-22 09:56:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-07-22 09:56:02,444 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.7301587301587302) internal successors, (235), 63 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2022-07-22 09:56:02,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:56:02,445 INFO L225 Difference]: With dead ends: 264 [2022-07-22 09:56:02,445 INFO L226 Difference]: Without dead ends: 262 [2022-07-22 09:56:02,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 282 SyntacticMatches, 10 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=534, Invalid=14472, Unknown=0, NotChecked=0, Total=15006 [2022-07-22 09:56:02,446 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 178 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 5939 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1983 SdHoareTripleChecker+Invalid, 6154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 5939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 09:56:02,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1983 Invalid, 6154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 5939 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 09:56:02,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-07-22 09:56:02,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 173. [2022-07-22 09:56:02,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:56:02,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2022-07-22 09:56:02,571 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 156 [2022-07-22 09:56:02,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:56:02,571 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2022-07-22 09:56:02,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.7301587301587302) internal successors, (235), 63 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:56:02,572 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2022-07-22 09:56:02,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-22 09:56:02,572 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:56:02,572 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:56:02,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-22 09:56:02,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:56:02,784 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:56:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:56:02,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1934297460, now seen corresponding path program 54 times [2022-07-22 09:56:02,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:56:02,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901770713] [2022-07-22 09:56:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:56:02,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:56:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:56:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 649 proven. 776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:56:03,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:56:03,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901770713] [2022-07-22 09:56:03,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901770713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:56:03,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427281742] [2022-07-22 09:56:03,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:56:03,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:56:03,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:56:03,264 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:56:03,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-22 09:56:07,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2022-07-22 09:56:07,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:56:07,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-22 09:56:07,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:56:07,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 722 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:56:07,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:56:08,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 722 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:56:08,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427281742] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:56:08,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:56:08,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 64 [2022-07-22 09:56:08,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422596124] [2022-07-22 09:56:08,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:56:08,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-22 09:56:08,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:56:08,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-22 09:56:08,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=3084, Unknown=0, NotChecked=0, Total=4032 [2022-07-22 09:56:08,043 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 64 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:56:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:56:08,707 INFO L93 Difference]: Finished difference Result 338 states and 341 transitions. [2022-07-22 09:56:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-22 09:56:08,708 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-07-22 09:56:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:56:08,709 INFO L225 Difference]: With dead ends: 338 [2022-07-22 09:56:08,709 INFO L226 Difference]: Without dead ends: 251 [2022-07-22 09:56:08,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1599, Invalid=5373, Unknown=0, NotChecked=0, Total=6972 [2022-07-22 09:56:08,710 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 419 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:56:08,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 323 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:56:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-07-22 09:56:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 173. [2022-07-22 09:56:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:56:08,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2022-07-22 09:56:08,811 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 160 [2022-07-22 09:56:08,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:56:08,811 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2022-07-22 09:56:08,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.875) internal successors, (248), 64 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:56:08,812 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2022-07-22 09:56:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-22 09:56:08,823 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:56:08,823 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:56:08,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-22 09:56:09,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:56:09,045 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:56:09,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:56:09,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1582755700, now seen corresponding path program 55 times [2022-07-22 09:56:09,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:56:09,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121119005] [2022-07-22 09:56:09,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:56:09,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:56:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:56:09,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1509 backedges. 0 proven. 1509 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:56:09,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:56:09,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121119005] [2022-07-22 09:56:09,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121119005] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:56:09,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873712363] [2022-07-22 09:56:09,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:56:09,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:56:09,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:56:09,841 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:56:09,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-22 09:56:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:56:10,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 91 conjunts are in the unsatisfiable core [2022-07-22 09:56:10,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:56:10,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 09:56:10,364 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:56:10,364 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 [2022-07-22 09:56:10,373 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:56:10,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:56:10,416 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 09:56:10,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 09:56:11,226 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 [2022-07-22 09:56:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1509 backedges. 3 proven. 1506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:56:11,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:56:11,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 19 [2022-07-22 09:56:11,601 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 37 treesize of output 33 [2022-07-22 09:56:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1509 backedges. 0 proven. 1508 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:56:11,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873712363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:56:11,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:56:11,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 45] total 67 [2022-07-22 09:56:11,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205801915] [2022-07-22 09:56:11,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:56:11,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-22 09:56:11,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:56:11,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-22 09:56:11,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=4200, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 09:56:11,769 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 67 states, 67 states have (on average 3.746268656716418) internal successors, (251), 67 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:56:13,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:56:13,836 INFO L93 Difference]: Finished difference Result 259 states and 261 transitions. [2022-07-22 09:56:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-07-22 09:56:13,837 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.746268656716418) internal successors, (251), 67 states have internal predecessors, (251), 0 states have call successors, (0), 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 164 [2022-07-22 09:56:13,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:56:13,837 INFO L225 Difference]: With dead ends: 259 [2022-07-22 09:56:13,837 INFO L226 Difference]: Without dead ends: 257 [2022-07-22 09:56:13,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 293 SyntacticMatches, 15 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2532 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=497, Invalid=11493, Unknown=0, NotChecked=0, Total=11990 [2022-07-22 09:56:13,838 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 123 mSDsluCounter, 1940 mSDsCounter, 0 mSdLazyCounter, 5826 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 1989 SdHoareTripleChecker+Invalid, 5978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 5826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:56:13,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 1989 Invalid, 5978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 5826 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-22 09:56:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-07-22 09:56:13,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 165. [2022-07-22 09:56:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:56:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-07-22 09:56:13,933 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 164 [2022-07-22 09:56:13,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:56:13,933 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-07-22 09:56:13,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.746268656716418) internal successors, (251), 67 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:56:13,933 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-07-22 09:56:13,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-22 09:56:13,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:56:13,934 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:56:13,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-07-22 09:56:14,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-22 09:56:14,152 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:56:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:56:14,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1178416849, now seen corresponding path program 56 times [2022-07-22 09:56:14,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:56:14,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141794080] [2022-07-22 09:56:14,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:56:14,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:56:14,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:56:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:56:14,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:56:14,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141794080] [2022-07-22 09:56:14,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141794080] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:56:14,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626527653] [2022-07-22 09:56:14,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:56:14,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:56:14,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:56:14,912 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:56:14,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-22 09:56:15,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:56:15,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:56:15,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-22 09:56:15,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:56:15,488 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 [2022-07-22 09:56:16,309 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 [2022-07-22 09:56:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:56:16,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:56:16,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-07-22 09:56:16,494 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-07-22 09:56:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1502 backedges. 0 proven. 1502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:56:16,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626527653] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:56:16,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:56:16,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 65 [2022-07-22 09:56:16,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387637290] [2022-07-22 09:56:16,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:56:16,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-22 09:56:16,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:56:16,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-22 09:56:16,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 09:56:16,665 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 65 states, 65 states have (on average 3.8) internal successors, (247), 65 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:56:19,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:56:19,752 INFO L93 Difference]: Finished difference Result 276 states and 279 transitions. [2022-07-22 09:56:19,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-07-22 09:56:19,752 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.8) internal successors, (247), 65 states have internal predecessors, (247), 0 states have call successors, (0), 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 164 [2022-07-22 09:56:19,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:56:19,753 INFO L225 Difference]: With dead ends: 276 [2022-07-22 09:56:19,753 INFO L226 Difference]: Without dead ends: 274 [2022-07-22 09:56:19,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 297 SyntacticMatches, 11 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3673 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=553, Invalid=15703, Unknown=0, NotChecked=0, Total=16256 [2022-07-22 09:56:19,754 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 182 mSDsluCounter, 1994 mSDsCounter, 0 mSdLazyCounter, 6182 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2044 SdHoareTripleChecker+Invalid, 6405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 6182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-07-22 09:56:19,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 2044 Invalid, 6405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 6182 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-07-22 09:56:19,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-07-22 09:56:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 181. [2022-07-22 09:56:19,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:56:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2022-07-22 09:56:19,869 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 164 [2022-07-22 09:56:19,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:56:19,869 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2022-07-22 09:56:19,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.8) internal successors, (247), 65 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:56:19,869 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2022-07-22 09:56:19,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-22 09:56:19,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:56:19,870 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:56:19,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-07-22 09:56:20,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-22 09:56:20,088 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:56:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:56:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash 615561125, now seen corresponding path program 57 times [2022-07-22 09:56:20,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:56:20,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506442392] [2022-07-22 09:56:20,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:56:20,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:56:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:56:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 723 proven. 857 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:56:20,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:56:20,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506442392] [2022-07-22 09:56:20,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506442392] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:56:20,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819646463] [2022-07-22 09:56:20,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:56:20,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:56:20,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:56:20,634 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:56:20,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process