./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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-cav19/array_min_and_copy_shift_sum_add.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 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 09:53:14,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:53:14,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:53:14,365 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:53:14,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:53:14,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:53:14,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:53:14,371 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:53:14,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:53:14,376 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:53:14,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:53:14,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:53:14,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:53:14,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:53:14,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:53:14,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:53:14,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:53:14,386 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:53:14,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:53:14,390 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:53:14,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:53:14,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:53:14,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:53:14,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:53:14,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:53:14,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:53:14,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:53:14,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:53:14,402 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:53:14,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:53:14,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:53:14,403 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:53:14,404 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:53:14,405 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:53:14,406 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:53:14,406 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:53:14,406 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:53:14,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:53:14,407 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:53:14,408 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:53:14,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:53:14,409 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:53:14,437 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:53:14,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:53:14,438 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:53:14,438 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:53:14,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:53:14,439 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:53:14,439 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:53:14,439 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:53:14,440 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:53:14,440 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:53:14,440 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:53:14,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:53:14,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:53:14,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:53:14,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:53:14,441 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:53:14,441 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:53:14,441 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:53:14,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:53:14,442 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:53:14,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:53:14,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:53:14,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:53:14,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:53:14,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:53:14,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:53:14,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:53:14,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:53:14,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:53:14,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:53:14,443 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:53:14,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:53:14,444 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:53:14,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:53:14,444 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:53:14,444 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2023-02-15 09:53:14,656 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:53:14,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:53:14,675 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:53:14,676 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:53:14,676 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:53:14,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2023-02-15 09:53:15,680 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:53:15,862 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:53:15,862 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2023-02-15 09:53:15,866 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70d4e719c/acab07feb1c94a73aaaf30073528f7d3/FLAG8da19a542 [2023-02-15 09:53:15,884 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/70d4e719c/acab07feb1c94a73aaaf30073528f7d3 [2023-02-15 09:53:15,886 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:53:15,887 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:53:15,889 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:53:15,890 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:53:15,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:53:15,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:53:15" (1/1) ... [2023-02-15 09:53:15,893 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@573710b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:15, skipping insertion in model container [2023-02-15 09:53:15,893 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:53:15" (1/1) ... [2023-02-15 09:53:15,899 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:53:15,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:53:16,024 WARN L237 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-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2023-02-15 09:53:16,042 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:53:16,048 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:53:16,059 WARN L237 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-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2023-02-15 09:53:16,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:53:16,083 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:53:16,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16 WrapperNode [2023-02-15 09:53:16,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:53:16,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:53:16,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:53:16,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:53:16,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16" (1/1) ... [2023-02-15 09:53:16,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16" (1/1) ... [2023-02-15 09:53:16,118 INFO L138 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-02-15 09:53:16,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:53:16,119 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:53:16,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:53:16,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:53:16,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16" (1/1) ... [2023-02-15 09:53:16,126 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16" (1/1) ... [2023-02-15 09:53:16,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16" (1/1) ... [2023-02-15 09:53:16,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16" (1/1) ... [2023-02-15 09:53:16,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16" (1/1) ... [2023-02-15 09:53:16,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16" (1/1) ... [2023-02-15 09:53:16,150 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16" (1/1) ... [2023-02-15 09:53:16,151 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16" (1/1) ... [2023-02-15 09:53:16,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:53:16,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:53:16,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:53:16,156 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:53:16,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16" (1/1) ... [2023-02-15 09:53:16,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:53:16,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:16,182 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) [2023-02-15 09:53:16,189 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 [2023-02-15 09:53:16,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:53:16,213 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 09:53:16,214 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 09:53:16,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:53:16,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 09:53:16,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:53:16,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:53:16,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:53:16,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:53:16,215 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 09:53:16,267 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:53:16,269 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:53:16,399 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:53:16,403 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:53:16,404 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 09:53:16,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:53:16 BoogieIcfgContainer [2023-02-15 09:53:16,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:53:16,406 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:53:16,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:53:16,409 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:53:16,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:53:15" (1/3) ... [2023-02-15 09:53:16,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9d554e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:53:16, skipping insertion in model container [2023-02-15 09:53:16,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:53:16" (2/3) ... [2023-02-15 09:53:16,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9d554e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:53:16, skipping insertion in model container [2023-02-15 09:53:16,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:53:16" (3/3) ... [2023-02-15 09:53:16,411 INFO L112 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2023-02-15 09:53:16,422 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:53:16,423 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:53:16,452 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:53:16,457 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4c53b22d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:53:16,457 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:53:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:53:16,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 09:53:16,465 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:16,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:16,466 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:16,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:16,470 INFO L85 PathProgramCache]: Analyzing trace with hash -459580484, now seen corresponding path program 1 times [2023-02-15 09:53:16,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:16,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748799966] [2023-02-15 09:53:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:16,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:16,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:16,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:53:16,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:16,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748799966] [2023-02-15 09:53:16,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748799966] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:53:16,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:53:16,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 09:53:16,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759708073] [2023-02-15 09:53:16,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:53:16,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 09:53:16,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:16,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 09:53:16,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 09:53:16,758 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:53:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:16,822 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2023-02-15 09:53:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 09:53:16,825 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-15 09:53:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:16,829 INFO L225 Difference]: With dead ends: 64 [2023-02-15 09:53:16,829 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 09:53:16,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:53:16,834 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:16,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:53:16,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 09:53:16,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-15 09:53:16,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:53:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-15 09:53:16,861 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2023-02-15 09:53:16,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:16,862 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-15 09:53:16,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 09:53:16,862 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-15 09:53:16,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 09:53:16,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:16,864 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:16,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 09:53:16,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:16,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash 778020126, now seen corresponding path program 1 times [2023-02-15 09:53:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:16,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086323679] [2023-02-15 09:53:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:16,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:17,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:17,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:53:17,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:17,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086323679] [2023-02-15 09:53:17,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086323679] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:53:17,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:53:17,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 09:53:17,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100890706] [2023-02-15 09:53:17,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:53:17,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 09:53:17,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:17,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 09:53:17,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:53:17,024 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:53:17,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:17,072 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2023-02-15 09:53:17,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 09:53:17,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-02-15 09:53:17,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:17,074 INFO L225 Difference]: With dead ends: 50 [2023-02-15 09:53:17,074 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 09:53:17,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:53:17,075 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:17,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 69 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:53:17,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 09:53:17,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2023-02-15 09:53:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:53:17,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-02-15 09:53:17,081 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2023-02-15 09:53:17,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:17,081 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-02-15 09:53:17,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-15 09:53:17,082 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-02-15 09:53:17,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 09:53:17,082 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:17,082 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:17,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 09:53:17,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:17,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:17,084 INFO L85 PathProgramCache]: Analyzing trace with hash 104610043, now seen corresponding path program 1 times [2023-02-15 09:53:17,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:17,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585799333] [2023-02-15 09:53:17,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:17,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:17,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:17,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:17,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:53:17,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:17,594 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:53:17,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:17,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585799333] [2023-02-15 09:53:17,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585799333] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:17,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692559380] [2023-02-15 09:53:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:17,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:17,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:17,600 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) [2023-02-15 09:53:17,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 09:53:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:17,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 09:53:17,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:17,819 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-02-15 09:53:17,859 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 09:53:17,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:53:17,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:17,965 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:53:17,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-02-15 09:53:17,996 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:53:17,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692559380] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:53:17,996 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:53:17,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2023-02-15 09:53:17,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466953260] [2023-02-15 09:53:17,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:17,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 09:53:17,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:17,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 09:53:17,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-02-15 09:53:17,999 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 09:53:18,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:18,178 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-02-15 09:53:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 09:53:18,179 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2023-02-15 09:53:18,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:18,180 INFO L225 Difference]: With dead ends: 54 [2023-02-15 09:53:18,180 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 09:53:18,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2023-02-15 09:53:18,181 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:18,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 159 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:53:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 09:53:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-02-15 09:53:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:53:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-15 09:53:18,187 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2023-02-15 09:53:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:18,188 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-15 09:53:18,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 09:53:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-15 09:53:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 09:53:18,189 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:18,189 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:18,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 09:53:18,394 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 [2023-02-15 09:53:18,395 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:18,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:18,395 INFO L85 PathProgramCache]: Analyzing trace with hash -906507207, now seen corresponding path program 1 times [2023-02-15 09:53:18,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:18,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969107275] [2023-02-15 09:53:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:18,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:18,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:18,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:18,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:18,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:18,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:53:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:18,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:53:18,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:18,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969107275] [2023-02-15 09:53:18,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969107275] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:18,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065798187] [2023-02-15 09:53:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:18,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:18,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:18,747 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) [2023-02-15 09:53:18,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 09:53:18,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:18,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 09:53:18,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:18,947 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-02-15 09:53:18,994 INFO L350 Elim1Store]: Elim1 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 [2023-02-15 09:53:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:53:19,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:21,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:53:21,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2023-02-15 09:53:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:53:21,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065798187] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:53:21,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:53:21,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2023-02-15 09:53:21,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405468709] [2023-02-15 09:53:21,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:21,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 09:53:21,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:21,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 09:53:21,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=447, Unknown=1, NotChecked=0, Total=552 [2023-02-15 09:53:21,213 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 09:53:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:21,654 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2023-02-15 09:53:21,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 09:53:21,654 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2023-02-15 09:53:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:21,656 INFO L225 Difference]: With dead ends: 68 [2023-02-15 09:53:21,656 INFO L226 Difference]: Without dead ends: 64 [2023-02-15 09:53:21,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=134, Invalid=567, Unknown=1, NotChecked=0, Total=702 [2023-02-15 09:53:21,657 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:21,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 208 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 09:53:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-15 09:53:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2023-02-15 09:53:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:53:21,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2023-02-15 09:53:21,663 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2023-02-15 09:53:21,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:21,663 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2023-02-15 09:53:21,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 09:53:21,664 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2023-02-15 09:53:21,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 09:53:21,664 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:21,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:21,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 09:53:21,875 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 [2023-02-15 09:53:21,876 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:21,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:21,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1799237277, now seen corresponding path program 2 times [2023-02-15 09:53:21,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:21,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408377475] [2023-02-15 09:53:21,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:21,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:21,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:21,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:21,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:53:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 09:53:21,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:21,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408377475] [2023-02-15 09:53:21,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408377475] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:21,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611201052] [2023-02-15 09:53:21,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:53:21,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:21,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:21,987 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) [2023-02-15 09:53:21,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 09:53:22,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:53:22,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:53:22,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:53:22,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 09:53:22,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:22,150 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 09:53:22,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611201052] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:53:22,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:53:22,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-15 09:53:22,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409800419] [2023-02-15 09:53:22,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:22,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 09:53:22,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:22,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 09:53:22,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 09:53:22,154 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 09:53:22,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:22,234 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2023-02-15 09:53:22,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 09:53:22,235 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2023-02-15 09:53:22,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:22,239 INFO L225 Difference]: With dead ends: 88 [2023-02-15 09:53:22,239 INFO L226 Difference]: Without dead ends: 69 [2023-02-15 09:53:22,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-15 09:53:22,241 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 64 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:22,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 83 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:53:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-15 09:53:22,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2023-02-15 09:53:22,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:53:22,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2023-02-15 09:53:22,256 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2023-02-15 09:53:22,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:22,257 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2023-02-15 09:53:22,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 09:53:22,257 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2023-02-15 09:53:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 09:53:22,261 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:22,261 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:22,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 09:53:22,469 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 [2023-02-15 09:53:22,469 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:22,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:22,470 INFO L85 PathProgramCache]: Analyzing trace with hash -7684490, now seen corresponding path program 3 times [2023-02-15 09:53:22,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:22,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307512761] [2023-02-15 09:53:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:22,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:22,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:22,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:22,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:53:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:22,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:53:22,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 09:53:22,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:22,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307512761] [2023-02-15 09:53:22,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307512761] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:22,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424512315] [2023-02-15 09:53:22,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:53:22,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:22,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:22,559 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) [2023-02-15 09:53:22,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 09:53:22,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 09:53:22,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:53:22,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:53:22,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 09:53:22,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:22,701 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-15 09:53:22,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424512315] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:53:22,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:53:22,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-15 09:53:22,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810214331] [2023-02-15 09:53:22,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:22,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 09:53:22,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:22,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 09:53:22,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 09:53:22,704 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 09:53:22,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:22,819 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2023-02-15 09:53:22,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 09:53:22,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2023-02-15 09:53:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:22,823 INFO L225 Difference]: With dead ends: 59 [2023-02-15 09:53:22,824 INFO L226 Difference]: Without dead ends: 51 [2023-02-15 09:53:22,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-15 09:53:22,825 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:22,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 140 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:53:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-15 09:53:22,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2023-02-15 09:53:22,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 09:53:22,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2023-02-15 09:53:22,837 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 46 [2023-02-15 09:53:22,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:22,838 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2023-02-15 09:53:22,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 09:53:22,839 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2023-02-15 09:53:22,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 09:53:22,840 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:22,840 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:22,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 09:53:23,046 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 [2023-02-15 09:53:23,047 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:23,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:23,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1064283002, now seen corresponding path program 4 times [2023-02-15 09:53:23,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:23,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782450335] [2023-02-15 09:53:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:23,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:24,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:24,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:24,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:53:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:24,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:53:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:53:24,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:24,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782450335] [2023-02-15 09:53:24,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782450335] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:24,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833109242] [2023-02-15 09:53:24,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:53:24,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:24,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:24,217 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) [2023-02-15 09:53:24,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 09:53:24,278 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:53:24,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:53:24,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 09:53:24,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:24,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:53:24,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:24,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:24,648 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:53:24,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2023-02-15 09:53:24,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:24,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2023-02-15 09:53:25,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2023-02-15 09:53:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 09:53:25,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:27,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833109242] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:27,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:53:27,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 36 [2023-02-15 09:53:27,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140038401] [2023-02-15 09:53:27,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:27,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 09:53:27,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:27,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 09:53:27,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 09:53:27,174 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:53:29,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:29,808 INFO L93 Difference]: Finished difference Result 96 states and 123 transitions. [2023-02-15 09:53:29,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 09:53:29,808 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-15 09:53:29,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:29,809 INFO L225 Difference]: With dead ends: 96 [2023-02-15 09:53:29,809 INFO L226 Difference]: Without dead ends: 92 [2023-02-15 09:53:29,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=841, Invalid=5479, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 09:53:29,811 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 85 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:29,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 335 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 09:53:29,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-15 09:53:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2023-02-15 09:53:29,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-15 09:53:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 77 transitions. [2023-02-15 09:53:29,818 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 77 transitions. Word has length 50 [2023-02-15 09:53:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:29,818 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 77 transitions. [2023-02-15 09:53:29,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6944444444444444) internal successors, (61), 36 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:53:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 77 transitions. [2023-02-15 09:53:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 09:53:29,819 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:29,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:29,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 09:53:30,019 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 [2023-02-15 09:53:30,020 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:30,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:30,020 INFO L85 PathProgramCache]: Analyzing trace with hash -929861704, now seen corresponding path program 1 times [2023-02-15 09:53:30,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:30,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118470034] [2023-02-15 09:53:30,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:30,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:30,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:30,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:30,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:30,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:53:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:30,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:53:30,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:53:30,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:30,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118470034] [2023-02-15 09:53:30,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118470034] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:30,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067335475] [2023-02-15 09:53:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:30,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:30,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:30,945 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) [2023-02-15 09:53:30,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 09:53:30,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:30,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 09:53:30,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:31,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:53:31,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:31,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:31,300 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:53:31,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2023-02-15 09:53:31,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:31,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-02-15 09:53:31,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2023-02-15 09:53:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 09:53:31,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:32,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067335475] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:32,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:53:32,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 37 [2023-02-15 09:53:32,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727789645] [2023-02-15 09:53:32,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:32,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 09:53:32,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:32,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 09:53:32,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 09:53:32,244 INFO L87 Difference]: Start difference. First operand 60 states and 77 transitions. Second operand has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:53:35,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:53:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:35,663 INFO L93 Difference]: Finished difference Result 100 states and 125 transitions. [2023-02-15 09:53:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 09:53:35,663 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-15 09:53:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:35,664 INFO L225 Difference]: With dead ends: 100 [2023-02-15 09:53:35,664 INFO L226 Difference]: Without dead ends: 94 [2023-02-15 09:53:35,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=583, Invalid=3973, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 09:53:35,665 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 54 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:35,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 290 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 896 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2023-02-15 09:53:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-15 09:53:35,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 74. [2023-02-15 09:53:35,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.2769230769230768) internal successors, (83), 65 states have internal predecessors, (83), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:53:35,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 97 transitions. [2023-02-15 09:53:35,676 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 97 transitions. Word has length 50 [2023-02-15 09:53:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:35,676 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 97 transitions. [2023-02-15 09:53:35,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.6486486486486487) internal successors, (61), 37 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:53:35,676 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 97 transitions. [2023-02-15 09:53:35,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 09:53:35,677 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:35,677 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:35,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 09:53:35,882 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 [2023-02-15 09:53:35,883 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:35,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:35,884 INFO L85 PathProgramCache]: Analyzing trace with hash 554809912, now seen corresponding path program 2 times [2023-02-15 09:53:35,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:35,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199326913] [2023-02-15 09:53:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:35,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:36,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:36,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:36,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:53:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:36,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:53:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:53:36,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:36,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199326913] [2023-02-15 09:53:36,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199326913] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:36,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960142607] [2023-02-15 09:53:36,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:53:36,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:36,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:36,857 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) [2023-02-15 09:53:36,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 09:53:36,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:53:36,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:53:36,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 09:53:36,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:37,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:53:37,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:37,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:37,552 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:53:37,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2023-02-15 09:53:37,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:37,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2023-02-15 09:53:37,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 20 [2023-02-15 09:53:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 09:53:37,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:38,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960142607] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:38,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:53:38,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 43 [2023-02-15 09:53:38,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369548086] [2023-02-15 09:53:38,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:38,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 09:53:38,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:38,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 09:53:38,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=2698, Unknown=0, NotChecked=0, Total=2970 [2023-02-15 09:53:38,673 INFO L87 Difference]: Start difference. First operand 74 states and 97 transitions. Second operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:53:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:40,682 INFO L93 Difference]: Finished difference Result 135 states and 176 transitions. [2023-02-15 09:53:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 09:53:40,683 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-15 09:53:40,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:40,684 INFO L225 Difference]: With dead ends: 135 [2023-02-15 09:53:40,684 INFO L226 Difference]: Without dead ends: 131 [2023-02-15 09:53:40,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=813, Invalid=5829, Unknown=0, NotChecked=0, Total=6642 [2023-02-15 09:53:40,686 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 139 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:40,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 200 Invalid, 1280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 09:53:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-15 09:53:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2023-02-15 09:53:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 68 states have (on average 1.2941176470588236) internal successors, (88), 68 states have internal predecessors, (88), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 09:53:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 104 transitions. [2023-02-15 09:53:40,707 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 104 transitions. Word has length 50 [2023-02-15 09:53:40,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:40,708 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 104 transitions. [2023-02-15 09:53:40,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:53:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 104 transitions. [2023-02-15 09:53:40,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 09:53:40,710 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:40,710 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:40,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 09:53:40,915 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 [2023-02-15 09:53:40,915 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:40,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:40,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334794, now seen corresponding path program 2 times [2023-02-15 09:53:40,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:40,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614200578] [2023-02-15 09:53:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:40,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:41,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:41,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:41,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:53:41,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:41,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:53:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:53:41,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:41,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614200578] [2023-02-15 09:53:41,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614200578] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:41,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412242179] [2023-02-15 09:53:41,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:53:41,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:41,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:41,873 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) [2023-02-15 09:53:41,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 09:53:41,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:53:41,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:53:41,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 09:53:41,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:41,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:53:42,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:42,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:42,273 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:53:42,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2023-02-15 09:53:42,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:42,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2023-02-15 09:53:42,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2023-02-15 09:53:42,674 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 09:53:42,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:44,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412242179] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:44,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:53:44,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2023-02-15 09:53:44,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577533316] [2023-02-15 09:53:44,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:44,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 09:53:44,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:44,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 09:53:44,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2049, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 09:53:44,317 INFO L87 Difference]: Start difference. First operand 78 states and 104 transitions. Second operand has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:53:47,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:53:50,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:53:50,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:50,890 INFO L93 Difference]: Finished difference Result 163 states and 209 transitions. [2023-02-15 09:53:50,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-15 09:53:50,891 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2023-02-15 09:53:50,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:50,892 INFO L225 Difference]: With dead ends: 163 [2023-02-15 09:53:50,892 INFO L226 Difference]: Without dead ends: 157 [2023-02-15 09:53:50,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=794, Invalid=5526, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 09:53:50,893 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 79 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 1232 mSolverCounterSat, 115 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1232 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:50,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 337 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1232 Invalid, 2 Unknown, 0 Unchecked, 4.7s Time] [2023-02-15 09:53:50,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-15 09:53:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 90. [2023-02-15 09:53:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 79 states have internal predecessors, (103), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:53:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 121 transitions. [2023-02-15 09:53:50,902 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 121 transitions. Word has length 50 [2023-02-15 09:53:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:50,904 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 121 transitions. [2023-02-15 09:53:50,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.605263157894737) internal successors, (61), 38 states have internal predecessors, (61), 7 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-15 09:53:50,904 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 121 transitions. [2023-02-15 09:53:50,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 09:53:50,905 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:50,905 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:50,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 09:53:51,109 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 [2023-02-15 09:53:51,109 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:51,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:51,109 INFO L85 PathProgramCache]: Analyzing trace with hash 626982236, now seen corresponding path program 5 times [2023-02-15 09:53:51,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:51,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659373161] [2023-02-15 09:53:51,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:51,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:51,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:51,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:51,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:53:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:51,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:53:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:51,209 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 09:53:51,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:51,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659373161] [2023-02-15 09:53:51,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659373161] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:51,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135186188] [2023-02-15 09:53:51,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:53:51,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:51,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:51,223 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) [2023-02-15 09:53:51,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 09:53:51,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 09:53:51,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:53:51,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:53:51,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 09:53:51,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:51,418 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 09:53:51,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135186188] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:53:51,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:53:51,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-15 09:53:51,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984775088] [2023-02-15 09:53:51,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:51,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 09:53:51,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:51,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 09:53:51,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-15 09:53:51,420 INFO L87 Difference]: Start difference. First operand 90 states and 121 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 09:53:51,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:51,530 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2023-02-15 09:53:51,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 09:53:51,530 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2023-02-15 09:53:51,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:51,531 INFO L225 Difference]: With dead ends: 176 [2023-02-15 09:53:51,531 INFO L226 Difference]: Without dead ends: 138 [2023-02-15 09:53:51,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-15 09:53:51,532 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 80 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:51,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 87 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:53:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-15 09:53:51,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 106. [2023-02-15 09:53:51,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 95 states have internal predecessors, (118), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:53:51,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 136 transitions. [2023-02-15 09:53:51,543 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 136 transitions. Word has length 52 [2023-02-15 09:53:51,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:51,544 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 136 transitions. [2023-02-15 09:53:51,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-15 09:53:51,544 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 136 transitions. [2023-02-15 09:53:51,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 09:53:51,545 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:51,545 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:51,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-15 09:53:51,750 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 [2023-02-15 09:53:51,751 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:51,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:51,751 INFO L85 PathProgramCache]: Analyzing trace with hash 48070069, now seen corresponding path program 6 times [2023-02-15 09:53:51,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:51,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69391121] [2023-02-15 09:53:51,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:51,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:51,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:51,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:51,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:51,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:51,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:53:51,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:51,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:53:51,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:51,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:53:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:51,833 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 09:53:51,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:51,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69391121] [2023-02-15 09:53:51,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69391121] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:51,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913263970] [2023-02-15 09:53:51,833 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:53:51,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:51,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:51,835 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) [2023-02-15 09:53:51,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 09:53:51,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 09:53:51,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:53:51,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 09:53:51,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 09:53:51,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:53:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-15 09:53:52,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913263970] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:53:52,015 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:53:52,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-15 09:53:52,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171516199] [2023-02-15 09:53:52,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:53:52,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 09:53:52,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:53:52,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 09:53:52,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-15 09:53:52,017 INFO L87 Difference]: Start difference. First operand 106 states and 136 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 09:53:52,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:53:52,142 INFO L93 Difference]: Finished difference Result 118 states and 148 transitions. [2023-02-15 09:53:52,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:53:52,143 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2023-02-15 09:53:52,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:53:52,143 INFO L225 Difference]: With dead ends: 118 [2023-02-15 09:53:52,143 INFO L226 Difference]: Without dead ends: 108 [2023-02-15 09:53:52,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-15 09:53:52,144 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:53:52,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 127 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:53:52,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-15 09:53:52,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 49. [2023-02-15 09:53:52,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-15 09:53:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-02-15 09:53:52,151 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 60 [2023-02-15 09:53:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:53:52,151 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-02-15 09:53:52,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 09:53:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-02-15 09:53:52,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 09:53:52,151 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:53:52,152 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:53:52,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 09:53:52,357 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 [2023-02-15 09:53:52,357 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:53:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:53:52,358 INFO L85 PathProgramCache]: Analyzing trace with hash -505691335, now seen corresponding path program 7 times [2023-02-15 09:53:52,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:53:52,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893047705] [2023-02-15 09:53:52,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:53:52,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:53:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:54,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:53:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:54,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:53:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:54,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:53:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:54,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:53:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:54,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:53:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:54,059 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:53:54,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:53:54,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893047705] [2023-02-15 09:53:54,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893047705] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:53:54,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283499816] [2023-02-15 09:53:54,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 09:53:54,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:53:54,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:53:54,061 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) [2023-02-15 09:53:54,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 09:53:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:53:54,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-15 09:53:54,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:53:54,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:53:54,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:54,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:54,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:54,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:54,837 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:53:54,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2023-02-15 09:53:54,991 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:53:54,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:54,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 79 [2023-02-15 09:53:55,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:55,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:53:55,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2023-02-15 09:53:55,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2023-02-15 09:53:55,826 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:53:55,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:54:03,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283499816] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:54:03,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:54:03,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 52 [2023-02-15 09:54:03,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893861781] [2023-02-15 09:54:03,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:54:03,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 09:54:03,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:54:03,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 09:54:03,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=3970, Unknown=2, NotChecked=0, Total=4290 [2023-02-15 09:54:03,867 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:54:10,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:54:10,797 INFO L93 Difference]: Finished difference Result 164 states and 205 transitions. [2023-02-15 09:54:10,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-15 09:54:10,798 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-15 09:54:10,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:54:10,799 INFO L225 Difference]: With dead ends: 164 [2023-02-15 09:54:10,799 INFO L226 Difference]: Without dead ends: 158 [2023-02-15 09:54:10,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4822 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1557, Invalid=14953, Unknown=2, NotChecked=0, Total=16512 [2023-02-15 09:54:10,802 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 205 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:54:10,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 485 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 09:54:10,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-15 09:54:10,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 114. [2023-02-15 09:54:10,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 99 states have (on average 1.303030303030303) internal successors, (129), 99 states have internal predecessors, (129), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 09:54:10,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 153 transitions. [2023-02-15 09:54:10,826 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 153 transitions. Word has length 64 [2023-02-15 09:54:10,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:54:10,827 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 153 transitions. [2023-02-15 09:54:10,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:54:10,827 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 153 transitions. [2023-02-15 09:54:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 09:54:10,830 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:54:10,830 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:54:10,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 09:54:11,034 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 [2023-02-15 09:54:11,035 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:54:11,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:54:11,035 INFO L85 PathProgramCache]: Analyzing trace with hash -286836617, now seen corresponding path program 3 times [2023-02-15 09:54:11,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:54:11,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569974398] [2023-02-15 09:54:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:54:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:54:11,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:12,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:54:12,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:12,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:54:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:12,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:54:12,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:12,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:54:12,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:12,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:54:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:54:12,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:54:12,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569974398] [2023-02-15 09:54:12,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569974398] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:54:12,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399425918] [2023-02-15 09:54:12,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:54:12,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:54:12,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:54:12,773 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) [2023-02-15 09:54:12,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 09:54:12,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 09:54:12,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:54:12,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-15 09:54:12,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:54:12,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:54:13,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:13,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:13,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:13,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:13,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:13,925 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:54:13,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 59 [2023-02-15 09:54:14,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:14,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:14,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:14,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:14,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2023-02-15 09:54:14,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:14,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:14,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:14,287 INFO L321 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2023-02-15 09:54:14,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 127 treesize of output 105 [2023-02-15 09:54:15,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:15,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:15,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:15,424 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:54:15,437 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:54:15,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 142 treesize of output 72 [2023-02-15 09:54:15,769 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 09:54:15,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:54:24,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399425918] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:54:24,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:54:24,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 56 [2023-02-15 09:54:24,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505347201] [2023-02-15 09:54:24,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:54:24,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-15 09:54:24,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:54:24,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-15 09:54:24,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=4950, Unknown=2, NotChecked=0, Total=5402 [2023-02-15 09:54:24,224 INFO L87 Difference]: Start difference. First operand 114 states and 153 transitions. Second operand has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:54:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:54:32,281 INFO L93 Difference]: Finished difference Result 182 states and 232 transitions. [2023-02-15 09:54:32,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-15 09:54:32,281 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-15 09:54:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:54:32,282 INFO L225 Difference]: With dead ends: 182 [2023-02-15 09:54:32,282 INFO L226 Difference]: Without dead ends: 156 [2023-02-15 09:54:32,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4492 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=1936, Invalid=14574, Unknown=2, NotChecked=0, Total=16512 [2023-02-15 09:54:32,284 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 183 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 09:54:32,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 512 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 09:54:32,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-15 09:54:32,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 116. [2023-02-15 09:54:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 101 states have (on average 1.297029702970297) internal successors, (131), 101 states have internal predecessors, (131), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 09:54:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 155 transitions. [2023-02-15 09:54:32,303 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 155 transitions. Word has length 64 [2023-02-15 09:54:32,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:54:32,303 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 155 transitions. [2023-02-15 09:54:32,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5) internal successors, (84), 56 states have internal predecessors, (84), 9 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:54:32,304 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 155 transitions. [2023-02-15 09:54:32,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 09:54:32,304 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:54:32,304 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:54:32,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 09:54:32,509 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 [2023-02-15 09:54:32,509 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:54:32,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:54:32,509 INFO L85 PathProgramCache]: Analyzing trace with hash -230931721, now seen corresponding path program 4 times [2023-02-15 09:54:32,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:54:32,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542174072] [2023-02-15 09:54:32,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:54:32,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:54:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:34,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:54:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:34,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:54:34,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:34,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:54:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:34,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:54:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:34,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:54:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:54:34,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:54:34,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542174072] [2023-02-15 09:54:34,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542174072] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:54:34,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537133350] [2023-02-15 09:54:34,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:54:34,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:54:34,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:54:34,066 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) [2023-02-15 09:54:34,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 09:54:34,132 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:54:34,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:54:34,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-15 09:54:34,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:54:34,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:54:34,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:34,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:34,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:34,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:34,851 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:54:34,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2023-02-15 09:54:35,000 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:54:35,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:35,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2023-02-15 09:54:35,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:35,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:35,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2023-02-15 09:54:35,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2023-02-15 09:54:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 09:54:35,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:54:37,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537133350] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:54:37,333 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:54:37,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 52 [2023-02-15 09:54:37,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072918138] [2023-02-15 09:54:37,333 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:54:37,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 09:54:37,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:54:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 09:54:37,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=4109, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 09:54:37,335 INFO L87 Difference]: Start difference. First operand 116 states and 155 transitions. Second operand has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:54:41,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:54:41,861 INFO L93 Difference]: Finished difference Result 175 states and 227 transitions. [2023-02-15 09:54:41,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 09:54:41,862 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-15 09:54:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:54:41,862 INFO L225 Difference]: With dead ends: 175 [2023-02-15 09:54:41,862 INFO L226 Difference]: Without dead ends: 148 [2023-02-15 09:54:41,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3305 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1230, Invalid=9482, Unknown=0, NotChecked=0, Total=10712 [2023-02-15 09:54:41,864 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 128 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-15 09:54:41,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 481 Invalid, 2280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2139 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-15 09:54:41,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-15 09:54:41,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 131. [2023-02-15 09:54:41,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 115 states have (on average 1.2869565217391303) internal successors, (148), 115 states have internal predecessors, (148), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 09:54:41,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 174 transitions. [2023-02-15 09:54:41,905 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 174 transitions. Word has length 64 [2023-02-15 09:54:41,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:54:41,905 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 174 transitions. [2023-02-15 09:54:41,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:54:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 174 transitions. [2023-02-15 09:54:41,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 09:54:41,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:54:41,906 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:54:41,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-15 09:54:42,114 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 [2023-02-15 09:54:42,114 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:54:42,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:54:42,114 INFO L85 PathProgramCache]: Analyzing trace with hash -12077003, now seen corresponding path program 5 times [2023-02-15 09:54:42,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:54:42,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853679845] [2023-02-15 09:54:42,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:54:42,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:54:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:43,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:54:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:43,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:54:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:43,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:54:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:43,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:54:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:43,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:54:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:54:43,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:54:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853679845] [2023-02-15 09:54:43,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853679845] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:54:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4602787] [2023-02-15 09:54:43,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:54:43,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:54:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:54:43,611 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) [2023-02-15 09:54:43,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 09:54:43,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-15 09:54:43,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:54:43,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-15 09:54:43,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:54:43,716 INFO L350 Elim1Store]: Elim1 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 18 treesize of output 16 [2023-02-15 09:54:44,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:44,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:44,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:44,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:44,405 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:54:44,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2023-02-15 09:54:44,592 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:54:44,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:44,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:44,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:44,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2023-02-15 09:54:44,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:44,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:54:44,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2023-02-15 09:54:45,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2023-02-15 09:54:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 09:54:45,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:54:48,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4602787] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:54:48,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:54:48,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2023-02-15 09:54:48,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293472198] [2023-02-15 09:54:48,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:54:48,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 09:54:48,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:54:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 09:54:48,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=3744, Unknown=1, NotChecked=0, Total=4032 [2023-02-15 09:54:48,742 INFO L87 Difference]: Start difference. First operand 131 states and 174 transitions. Second operand has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:54:53,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:54:57,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:54:57,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:54:57,927 INFO L93 Difference]: Finished difference Result 196 states and 253 transitions. [2023-02-15 09:54:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 09:54:57,927 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-15 09:54:57,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:54:57,941 INFO L225 Difference]: With dead ends: 196 [2023-02-15 09:54:57,941 INFO L226 Difference]: Without dead ends: 160 [2023-02-15 09:54:57,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3023 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1129, Invalid=10000, Unknown=1, NotChecked=0, Total=11130 [2023-02-15 09:54:57,946 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 117 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 163 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 2350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-02-15 09:54:57,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 438 Invalid, 2350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 2185 Invalid, 2 Unknown, 0 Unchecked, 5.4s Time] [2023-02-15 09:54:57,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-02-15 09:54:57,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 140. [2023-02-15 09:54:57,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 123 states have (on average 1.2926829268292683) internal successors, (159), 123 states have internal predecessors, (159), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 09:54:57,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 187 transitions. [2023-02-15 09:54:57,972 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 187 transitions. Word has length 64 [2023-02-15 09:54:57,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:54:57,972 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 187 transitions. [2023-02-15 09:54:57,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:54:57,972 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 187 transitions. [2023-02-15 09:54:57,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 09:54:57,973 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:54:57,973 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:54:57,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 09:54:58,178 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 [2023-02-15 09:54:58,179 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:54:58,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:54:58,179 INFO L85 PathProgramCache]: Analyzing trace with hash -257544841, now seen corresponding path program 6 times [2023-02-15 09:54:58,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:54:58,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102669051] [2023-02-15 09:54:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:54:58,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:54:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:59,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:54:59,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:59,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:54:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:59,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:54:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:59,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:54:59,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:59,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:54:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:54:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:54:59,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:54:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102669051] [2023-02-15 09:54:59,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102669051] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:54:59,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313267942] [2023-02-15 09:54:59,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:54:59,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:54:59,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:54:59,827 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) [2023-02-15 09:54:59,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 09:54:59,900 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-02-15 09:54:59,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:54:59,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-15 09:54:59,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:54:59,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:55:08,342 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:55:08,346 INFO L321 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2023-02-15 09:55:08,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 64 [2023-02-15 09:55:08,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:08,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:08,550 INFO L321 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2023-02-15 09:55:08,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 83 [2023-02-15 09:55:08,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:08,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:08,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:08,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:08,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:08,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:08,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:08,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:08,765 INFO L321 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-02-15 09:55:08,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 109 treesize of output 96 [2023-02-15 09:55:09,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:09,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:09,697 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:55:09,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:55:09,698 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:55:09,719 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:55:09,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 85 [2023-02-15 09:55:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:55:10,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:55:13,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313267942] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:55:13,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:55:13,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 34] total 60 [2023-02-15 09:55:13,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135717590] [2023-02-15 09:55:13,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:55:13,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-15 09:55:13,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:55:13,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-15 09:55:13,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=5619, Unknown=4, NotChecked=0, Total=6320 [2023-02-15 09:55:13,115 INFO L87 Difference]: Start difference. First operand 140 states and 187 transitions. Second operand has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:55:15,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:55:16,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:55:17,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:55:20,975 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:55:23,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:55:35,209 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:55:37,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:55:40,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:56:03,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:56:06,074 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:56:08,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:56:10,471 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:56:30,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:56:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:56:37,732 INFO L93 Difference]: Finished difference Result 414 states and 547 transitions. [2023-02-15 09:56:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-02-15 09:56:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-15 09:56:37,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:56:37,734 INFO L225 Difference]: With dead ends: 414 [2023-02-15 09:56:37,734 INFO L226 Difference]: Without dead ends: 408 [2023-02-15 09:56:37,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7258 ImplicationChecksByTransitivity, 72.8s TimeCoverageRelationStatistics Valid=2867, Invalid=21917, Unknown=22, NotChecked=0, Total=24806 [2023-02-15 09:56:37,736 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 184 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 2277 mSolverCounterSat, 149 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 2438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 2277 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.3s IncrementalHoareTripleChecker+Time [2023-02-15 09:56:37,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 638 Invalid, 2438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 2277 Invalid, 12 Unknown, 0 Unchecked, 24.3s Time] [2023-02-15 09:56:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2023-02-15 09:56:37,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 184. [2023-02-15 09:56:37,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 160 states have (on average 1.34375) internal successors, (215), 160 states have internal predecessors, (215), 20 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-02-15 09:56:37,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 255 transitions. [2023-02-15 09:56:37,788 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 255 transitions. Word has length 64 [2023-02-15 09:56:37,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:56:37,789 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 255 transitions. [2023-02-15 09:56:37,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.35) internal successors, (81), 59 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:56:37,789 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 255 transitions. [2023-02-15 09:56:37,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 09:56:37,790 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:56:37,790 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:56:37,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 09:56:37,992 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 [2023-02-15 09:56:37,992 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:56:37,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:56:37,993 INFO L85 PathProgramCache]: Analyzing trace with hash -38690123, now seen corresponding path program 7 times [2023-02-15 09:56:37,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:56:37,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482345881] [2023-02-15 09:56:37,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:56:37,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:56:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:39,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:56:39,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:39,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:56:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:39,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:56:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:39,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:56:39,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:39,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:56:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:39,665 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:56:39,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:56:39,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482345881] [2023-02-15 09:56:39,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482345881] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:56:39,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428124293] [2023-02-15 09:56:39,666 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 09:56:39,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:56:39,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:56:39,667 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) [2023-02-15 09:56:39,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 09:56:39,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:39,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-15 09:56:39,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:56:39,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:56:40,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:40,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:40,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:40,356 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:56:40,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2023-02-15 09:56:40,491 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:56:40,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:40,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:40,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:40,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 67 [2023-02-15 09:56:40,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:40,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:40,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 75 [2023-02-15 09:56:41,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 39 [2023-02-15 09:56:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 09:56:41,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:56:45,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428124293] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:56:45,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:56:45,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2023-02-15 09:56:45,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857435023] [2023-02-15 09:56:45,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:56:45,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-15 09:56:45,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:56:45,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-15 09:56:45,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=4107, Unknown=0, NotChecked=0, Total=4422 [2023-02-15 09:56:45,025 INFO L87 Difference]: Start difference. First operand 184 states and 255 transitions. Second operand has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:56:50,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:56:50,187 INFO L93 Difference]: Finished difference Result 296 states and 389 transitions. [2023-02-15 09:56:50,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-15 09:56:50,188 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-15 09:56:50,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:56:50,189 INFO L225 Difference]: With dead ends: 296 [2023-02-15 09:56:50,189 INFO L226 Difference]: Without dead ends: 264 [2023-02-15 09:56:50,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3784 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1287, Invalid=11595, Unknown=0, NotChecked=0, Total=12882 [2023-02-15 09:56:50,190 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 153 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:56:50,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 500 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1875 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-15 09:56:50,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-02-15 09:56:50,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 196. [2023-02-15 09:56:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 171 states have (on average 1.345029239766082) internal successors, (230), 171 states have internal predecessors, (230), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-15 09:56:50,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2023-02-15 09:56:50,232 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 64 [2023-02-15 09:56:50,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:56:50,233 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2023-02-15 09:56:50,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:56:50,233 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2023-02-15 09:56:50,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 09:56:50,234 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:56:50,234 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:56:50,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 09:56:50,441 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 [2023-02-15 09:56:50,442 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:56:50,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:56:50,442 INFO L85 PathProgramCache]: Analyzing trace with hash 17214773, now seen corresponding path program 8 times [2023-02-15 09:56:50,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:56:50,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095339195] [2023-02-15 09:56:50,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:56:50,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:56:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:52,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:56:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:52,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:56:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:52,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:56:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:52,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:56:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:52,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:56:52,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:56:52,061 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:56:52,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:56:52,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095339195] [2023-02-15 09:56:52,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095339195] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:56:52,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504272074] [2023-02-15 09:56:52,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:56:52,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:56:52,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:56:52,063 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) [2023-02-15 09:56:52,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 09:56:52,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:56:52,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:56:52,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-15 09:56:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:56:52,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:56:53,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:53,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:53,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:53,118 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:56:53,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 59 [2023-02-15 09:56:53,273 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:56:53,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:53,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:53,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:53,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 69 [2023-02-15 09:56:53,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:53,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:56:53,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 67 [2023-02-15 09:56:54,038 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2023-02-15 09:56:54,086 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 09:56:54,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:57:00,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504272074] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:57:00,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:57:00,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 57 [2023-02-15 09:57:00,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809258226] [2023-02-15 09:57:00,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:57:00,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-15 09:57:00,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:57:00,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-15 09:57:00,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=4884, Unknown=2, NotChecked=0, Total=5256 [2023-02-15 09:57:00,286 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:57:08,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:57:08,233 INFO L93 Difference]: Finished difference Result 294 states and 390 transitions. [2023-02-15 09:57:08,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-15 09:57:08,235 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-15 09:57:08,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:57:08,237 INFO L225 Difference]: With dead ends: 294 [2023-02-15 09:57:08,237 INFO L226 Difference]: Without dead ends: 288 [2023-02-15 09:57:08,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4835 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1665, Invalid=16693, Unknown=2, NotChecked=0, Total=18360 [2023-02-15 09:57:08,239 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 159 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 2776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-15 09:57:08,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 484 Invalid, 2776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2579 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-15 09:57:08,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-02-15 09:57:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 214. [2023-02-15 09:57:08,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 186 states have (on average 1.3602150537634408) internal successors, (253), 186 states have internal predecessors, (253), 24 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-15 09:57:08,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 301 transitions. [2023-02-15 09:57:08,325 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 301 transitions. Word has length 64 [2023-02-15 09:57:08,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:57:08,325 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 301 transitions. [2023-02-15 09:57:08,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.4107142857142858) internal successors, (79), 56 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:57:08,326 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 301 transitions. [2023-02-15 09:57:08,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 09:57:08,327 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:57:08,327 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:57:08,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 09:57:08,532 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 [2023-02-15 09:57:08,533 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:57:08,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:57:08,533 INFO L85 PathProgramCache]: Analyzing trace with hash 236069491, now seen corresponding path program 3 times [2023-02-15 09:57:08,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:57:08,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561976321] [2023-02-15 09:57:08,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:57:08,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:57:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:10,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:57:10,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:10,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:57:10,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:10,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:57:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:10,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:57:10,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:10,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:57:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:57:10,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:57:10,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561976321] [2023-02-15 09:57:10,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561976321] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:57:10,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929330728] [2023-02-15 09:57:10,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:57:10,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:57:10,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:57:10,042 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) [2023-02-15 09:57:10,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 09:57:10,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-15 09:57:10,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:57:10,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-15 09:57:10,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:57:10,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-15 09:57:10,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:10,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:10,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:10,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:10,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:10,973 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:57:10,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 57 [2023-02-15 09:57:11,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:11,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:11,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:11,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:11,170 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 63 [2023-02-15 09:57:11,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:11,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:11,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:11,334 INFO L321 Elim1Store]: treesize reduction 62, result has 31.9 percent of original size [2023-02-15 09:57:11,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 155 treesize of output 113 [2023-02-15 09:57:12,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:12,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:57:12,483 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:57:12,495 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:57:12,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 80 [2023-02-15 09:57:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-15 09:57:12,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:57:26,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929330728] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:57:26,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:57:26,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2023-02-15 09:57:26,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108272317] [2023-02-15 09:57:26,714 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:57:26,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-15 09:57:26,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:57:26,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-15 09:57:26,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=4794, Unknown=4, NotChecked=0, Total=5256 [2023-02-15 09:57:26,715 INFO L87 Difference]: Start difference. First operand 214 states and 301 transitions. Second operand has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:57:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:57:34,554 INFO L93 Difference]: Finished difference Result 276 states and 373 transitions. [2023-02-15 09:57:34,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-15 09:57:34,555 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-02-15 09:57:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:57:34,556 INFO L225 Difference]: With dead ends: 276 [2023-02-15 09:57:34,556 INFO L226 Difference]: Without dead ends: 253 [2023-02-15 09:57:34,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4239 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=1726, Invalid=12790, Unknown=4, NotChecked=0, Total=14520 [2023-02-15 09:57:34,557 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 120 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 09:57:34,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 395 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 1863 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 09:57:34,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2023-02-15 09:57:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 210. [2023-02-15 09:57:34,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 183 states have (on average 1.349726775956284) internal successors, (247), 183 states have internal predecessors, (247), 23 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2023-02-15 09:57:34,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 293 transitions. [2023-02-15 09:57:34,611 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 293 transitions. Word has length 64 [2023-02-15 09:57:34,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:57:34,611 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 293 transitions. [2023-02-15 09:57:34,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 09:57:34,611 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 293 transitions. [2023-02-15 09:57:34,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-15 09:57:34,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:57:34,612 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:57:34,617 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-15 09:57:34,816 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 [2023-02-15 09:57:34,817 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:57:34,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:57:34,817 INFO L85 PathProgramCache]: Analyzing trace with hash -584834725, now seen corresponding path program 8 times [2023-02-15 09:57:34,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:57:34,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371985652] [2023-02-15 09:57:34,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:57:34,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:57:34,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:34,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:57:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:34,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:57:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:34,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:57:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:34,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:57:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:34,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:57:34,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:34,909 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 11 proven. 26 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 09:57:34,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:57:34,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371985652] [2023-02-15 09:57:34,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371985652] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:57:34,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121166835] [2023-02-15 09:57:34,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:57:34,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:57:34,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:57:34,911 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) [2023-02-15 09:57:34,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 09:57:34,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:57:34,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:57:34,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 09:57:34,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:57:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 09:57:35,077 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:57:35,142 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-02-15 09:57:35,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121166835] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:57:35,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:57:35,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-15 09:57:35,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207695101] [2023-02-15 09:57:35,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:57:35,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 09:57:35,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:57:35,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 09:57:35,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-15 09:57:35,143 INFO L87 Difference]: Start difference. First operand 210 states and 293 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 09:57:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:57:35,394 INFO L93 Difference]: Finished difference Result 348 states and 458 transitions. [2023-02-15 09:57:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:57:35,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 66 [2023-02-15 09:57:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:57:35,396 INFO L225 Difference]: With dead ends: 348 [2023-02-15 09:57:35,396 INFO L226 Difference]: Without dead ends: 282 [2023-02-15 09:57:35,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 128 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-02-15 09:57:35,398 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 78 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:57:35,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 116 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:57:35,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-02-15 09:57:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 196. [2023-02-15 09:57:35,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 171 states have (on average 1.3333333333333333) internal successors, (228), 171 states have internal predecessors, (228), 21 states have call successors, (21), 3 states have call predecessors, (21), 3 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2023-02-15 09:57:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 270 transitions. [2023-02-15 09:57:35,454 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 270 transitions. Word has length 66 [2023-02-15 09:57:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:57:35,455 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 270 transitions. [2023-02-15 09:57:35,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 09:57:35,455 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 270 transitions. [2023-02-15 09:57:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-15 09:57:35,456 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:57:35,456 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:57:35,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 09:57:35,660 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 [2023-02-15 09:57:35,661 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:57:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:57:35,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1051375952, now seen corresponding path program 9 times [2023-02-15 09:57:35,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:57:35,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746313590] [2023-02-15 09:57:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:57:35,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:57:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:35,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:57:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:35,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:57:35,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:35,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:57:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:35,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:57:35,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:35,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:57:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:35,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-15 09:57:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-15 09:57:35,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:57:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746313590] [2023-02-15 09:57:35,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746313590] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:57:35,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264456980] [2023-02-15 09:57:35,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:57:35,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:57:35,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:57:35,778 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) [2023-02-15 09:57:35,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 09:57:35,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 09:57:35,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:57:35,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 09:57:35,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:57:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-15 09:57:35,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:57:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-15 09:57:36,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264456980] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:57:36,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:57:36,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-15 09:57:36,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378975564] [2023-02-15 09:57:36,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:57:36,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 09:57:36,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:57:36,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 09:57:36,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-15 09:57:36,101 INFO L87 Difference]: Start difference. First operand 196 states and 270 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 09:57:36,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:57:36,363 INFO L93 Difference]: Finished difference Result 210 states and 284 transitions. [2023-02-15 09:57:36,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 09:57:36,365 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 74 [2023-02-15 09:57:36,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:57:36,366 INFO L225 Difference]: With dead ends: 210 [2023-02-15 09:57:36,366 INFO L226 Difference]: Without dead ends: 198 [2023-02-15 09:57:36,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-02-15 09:57:36,367 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 75 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:57:36,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 183 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:57:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-02-15 09:57:36,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 77. [2023-02-15 09:57:36,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 66 states have internal predecessors, (82), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 09:57:36,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2023-02-15 09:57:36,396 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 74 [2023-02-15 09:57:36,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:57:36,396 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2023-02-15 09:57:36,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 17 states have internal predecessors, (69), 6 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-15 09:57:36,396 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2023-02-15 09:57:36,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-15 09:57:36,397 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:57:36,397 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:57:36,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-15 09:57:36,601 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 [2023-02-15 09:57:36,602 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:57:36,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:57:36,602 INFO L85 PathProgramCache]: Analyzing trace with hash -517304264, now seen corresponding path program 9 times [2023-02-15 09:57:36,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:57:36,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534033872] [2023-02-15 09:57:36,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:57:36,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:57:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:39,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 09:57:39,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:39,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-02-15 09:57:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:39,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:57:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:39,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-15 09:57:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:39,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 09:57:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:39,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-02-15 09:57:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:57:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 09:57:39,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:57:39,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534033872] [2023-02-15 09:57:39,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534033872] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:57:39,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273203327] [2023-02-15 09:57:39,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:57:39,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:57:39,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:57:39,131 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) [2023-02-15 09:57:39,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 09:57:39,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 09:57:39,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:57:39,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-15 09:57:39,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:57:39,227 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8