./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/res1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/res1.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 f274a5aba9f5a53aba1b5bf0fd0b9cf2990c13e825cbbe6f7043cc6fa5a18df6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 00:28:18,089 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 00:28:18,092 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 00:28:18,132 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 00:28:18,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 00:28:18,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 00:28:18,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 00:28:18,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 00:28:18,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 00:28:18,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 00:28:18,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 00:28:18,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 00:28:18,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 00:28:18,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 00:28:18,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 00:28:18,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 00:28:18,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 00:28:18,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 00:28:18,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 00:28:18,162 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 00:28:18,163 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 00:28:18,164 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 00:28:18,165 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 00:28:18,166 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 00:28:18,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 00:28:18,174 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 00:28:18,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 00:28:18,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 00:28:18,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 00:28:18,177 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 00:28:18,177 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 00:28:18,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 00:28:18,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 00:28:18,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 00:28:18,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 00:28:18,182 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 00:28:18,183 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 00:28:18,183 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 00:28:18,183 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 00:28:18,185 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 00:28:18,186 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 00:28:18,186 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 00:28:18,214 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 00:28:18,214 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 00:28:18,215 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 00:28:18,215 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 00:28:18,216 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 00:28:18,216 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 00:28:18,217 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 00:28:18,217 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 00:28:18,217 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 00:28:18,218 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 00:28:18,218 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 00:28:18,219 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 00:28:18,219 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 00:28:18,219 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 00:28:18,219 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 00:28:18,219 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 00:28:18,220 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 00:28:18,220 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 00:28:18,220 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 00:28:18,220 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 00:28:18,221 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 00:28:18,221 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 00:28:18,221 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 00:28:18,221 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 00:28:18,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:28:18,222 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 00:28:18,222 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 00:28:18,222 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 00:28:18,223 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 00:28:18,223 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 00:28:18,223 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 00:28:18,223 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 00:28:18,224 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 00:28:18,224 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 00:28:18,224 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 00:28:18,224 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f274a5aba9f5a53aba1b5bf0fd0b9cf2990c13e825cbbe6f7043cc6fa5a18df6 [2023-02-16 00:28:18,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 00:28:18,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 00:28:18,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 00:28:18,480 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 00:28:18,480 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 00:28:18,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/res1.c [2023-02-16 00:28:19,631 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 00:28:19,781 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 00:28:19,781 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/res1.c [2023-02-16 00:28:19,786 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4828913dd/4382caa987ee4aa485e57c4c588274bd/FLAG2c6375616 [2023-02-16 00:28:19,797 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4828913dd/4382caa987ee4aa485e57c4c588274bd [2023-02-16 00:28:19,800 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 00:28:19,801 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 00:28:19,802 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 00:28:19,802 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 00:28:19,805 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 00:28:19,806 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:19,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2beaf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19, skipping insertion in model container [2023-02-16 00:28:19,807 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:19,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 00:28:19,827 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 00:28:19,942 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-fpi/res1.c[587,600] [2023-02-16 00:28:19,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:28:19,964 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 00:28:19,974 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-fpi/res1.c[587,600] [2023-02-16 00:28:19,981 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 00:28:19,992 INFO L208 MainTranslator]: Completed translation [2023-02-16 00:28:19,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19 WrapperNode [2023-02-16 00:28:19,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 00:28:19,994 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 00:28:19,994 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 00:28:19,994 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 00:28:20,000 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:20,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:20,023 INFO L138 Inliner]: procedures = 17, calls = 31, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 95 [2023-02-16 00:28:20,023 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 00:28:20,024 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 00:28:20,024 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 00:28:20,024 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 00:28:20,029 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:20,030 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:20,032 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:20,032 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:20,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:20,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:20,041 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:20,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:20,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 00:28:20,045 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 00:28:20,045 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 00:28:20,045 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 00:28:20,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19" (1/1) ... [2023-02-16 00:28:20,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 00:28:20,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:28:20,072 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) [2023-02-16 00:28:20,090 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 [2023-02-16 00:28:20,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 00:28:20,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 00:28:20,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-16 00:28:20,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-16 00:28:20,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-16 00:28:20,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 00:28:20,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 00:28:20,107 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-16 00:28:20,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-16 00:28:20,196 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 00:28:20,200 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 00:28:20,384 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 00:28:20,403 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 00:28:20,403 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-16 00:28:20,405 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:28:20 BoogieIcfgContainer [2023-02-16 00:28:20,405 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 00:28:20,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 00:28:20,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 00:28:20,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 00:28:20,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 12:28:19" (1/3) ... [2023-02-16 00:28:20,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767d7f6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:28:20, skipping insertion in model container [2023-02-16 00:28:20,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 12:28:19" (2/3) ... [2023-02-16 00:28:20,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@767d7f6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 12:28:20, skipping insertion in model container [2023-02-16 00:28:20,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 12:28:20" (3/3) ... [2023-02-16 00:28:20,426 INFO L112 eAbstractionObserver]: Analyzing ICFG res1.c [2023-02-16 00:28:20,464 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 00:28:20,465 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 00:28:20,538 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 00:28:20,545 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;@516ee760, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 00:28:20,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 00:28:20,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:20,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 00:28:20,557 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:28:20,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:28:20,559 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:28:20,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:28:20,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1202110748, now seen corresponding path program 1 times [2023-02-16 00:28:20,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:28:20,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723214006] [2023-02-16 00:28:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:28:20,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:28:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:28:20,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:28:20,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:28:20,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723214006] [2023-02-16 00:28:20,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723214006] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:28:20,772 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:28:20,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 00:28:20,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764493372] [2023-02-16 00:28:20,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:28:20,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 00:28:20,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:28:20,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 00:28:20,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:28:20,825 INFO L87 Difference]: Start difference. First operand has 24 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:20,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:28:20,840 INFO L93 Difference]: Finished difference Result 44 states and 62 transitions. [2023-02-16 00:28:20,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 00:28:20,842 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-16 00:28:20,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:28:20,848 INFO L225 Difference]: With dead ends: 44 [2023-02-16 00:28:20,849 INFO L226 Difference]: Without dead ends: 20 [2023-02-16 00:28:20,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 00:28:20,854 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:28:20,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:28:20,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-16 00:28:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-16 00:28:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-02-16 00:28:20,892 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 15 [2023-02-16 00:28:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:28:20,893 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-02-16 00:28:20,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:20,894 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-02-16 00:28:20,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 00:28:20,895 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:28:20,895 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:28:20,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 00:28:20,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:28:20,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:28:20,897 INFO L85 PathProgramCache]: Analyzing trace with hash -944124056, now seen corresponding path program 1 times [2023-02-16 00:28:20,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:28:20,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412855091] [2023-02-16 00:28:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:28:20,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:28:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:28:21,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:28:21,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:28:21,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412855091] [2023-02-16 00:28:21,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412855091] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 00:28:21,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 00:28:21,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 00:28:21,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730516716] [2023-02-16 00:28:21,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 00:28:21,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 00:28:21,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:28:21,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 00:28:21,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:28:21,076 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:21,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:28:21,139 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2023-02-16 00:28:21,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 00:28:21,139 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-16 00:28:21,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:28:21,140 INFO L225 Difference]: With dead ends: 41 [2023-02-16 00:28:21,140 INFO L226 Difference]: Without dead ends: 28 [2023-02-16 00:28:21,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-16 00:28:21,142 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 00:28:21,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 12 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 00:28:21,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-16 00:28:21,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-02-16 00:28:21,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:21,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-16 00:28:21,148 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 15 [2023-02-16 00:28:21,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:28:21,149 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-16 00:28:21,149 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:21,149 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-16 00:28:21,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 00:28:21,150 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:28:21,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:28:21,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 00:28:21,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:28:21,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:28:21,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1401448688, now seen corresponding path program 1 times [2023-02-16 00:28:21,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:28:21,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524317838] [2023-02-16 00:28:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:28:21,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:28:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:28:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:28:22,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:28:22,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524317838] [2023-02-16 00:28:22,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524317838] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:28:22,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166968510] [2023-02-16 00:28:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:28:22,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:28:22,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:28:22,762 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) [2023-02-16 00:28:22,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 00:28:22,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:28:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-16 00:28:22,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:28:22,987 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 [2023-02-16 00:28:23,004 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 14 treesize of output 12 [2023-02-16 00:28:23,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:23,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-02-16 00:28:23,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:23,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2023-02-16 00:28:23,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:23,379 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 46 treesize of output 36 [2023-02-16 00:28:23,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:23,576 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 50 treesize of output 36 [2023-02-16 00:28:23,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:23,707 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 39 treesize of output 15 [2023-02-16 00:28:23,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:28:23,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:28:24,344 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:28:24,345 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:28:24,346 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:28:24,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:28:24,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166968510] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:28:24,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:28:24,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2023-02-16 00:28:24,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794618269] [2023-02-16 00:28:24,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:28:24,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-16 00:28:24,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:28:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-16 00:28:24,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2023-02-16 00:28:24,361 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:25,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:28:25,135 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2023-02-16 00:28:25,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 00:28:25,135 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-16 00:28:25,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:28:25,136 INFO L225 Difference]: With dead ends: 36 [2023-02-16 00:28:25,136 INFO L226 Difference]: Without dead ends: 32 [2023-02-16 00:28:25,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 27 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=289, Invalid=1193, Unknown=0, NotChecked=0, Total=1482 [2023-02-16 00:28:25,138 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 00:28:25,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 69 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 00:28:25,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-16 00:28:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-02-16 00:28:25,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-02-16 00:28:25,144 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 23 [2023-02-16 00:28:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:28:25,144 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-02-16 00:28:25,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-02-16 00:28:25,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 00:28:25,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:28:25,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:28:25,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-16 00:28:25,349 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 [2023-02-16 00:28:25,349 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:28:25,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:28:25,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1774307726, now seen corresponding path program 2 times [2023-02-16 00:28:25,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:28:25,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157343159] [2023-02-16 00:28:25,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:28:25,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:28:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:28:25,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 00:28:25,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:28:25,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157343159] [2023-02-16 00:28:25,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157343159] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:28:25,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725230137] [2023-02-16 00:28:25,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 00:28:25,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:28:25,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:28:25,427 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) [2023-02-16 00:28:25,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 00:28:25,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 00:28:25,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:28:25,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 00:28:25,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:28:25,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 00:28:25,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:28:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 00:28:25,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725230137] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:28:25,567 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:28:25,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-16 00:28:25,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126111914] [2023-02-16 00:28:25,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:28:25,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 00:28:25,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:28:25,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 00:28:25,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-16 00:28:25,568 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:28:25,677 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2023-02-16 00:28:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 00:28:25,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-16 00:28:25,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:28:25,678 INFO L225 Difference]: With dead ends: 73 [2023-02-16 00:28:25,678 INFO L226 Difference]: Without dead ends: 40 [2023-02-16 00:28:25,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-16 00:28:25,679 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:28:25,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 33 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:28:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-16 00:28:25,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2023-02-16 00:28:25,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-02-16 00:28:25,685 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2023-02-16 00:28:25,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:28:25,685 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-02-16 00:28:25,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:25,685 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-02-16 00:28:25,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-16 00:28:25,686 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:28:25,686 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:28:25,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 00:28:25,889 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 [2023-02-16 00:28:25,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:28:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:28:25,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1796008330, now seen corresponding path program 3 times [2023-02-16 00:28:25,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:28:25,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139779177] [2023-02-16 00:28:25,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:28:25,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:28:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:28:25,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 00:28:25,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:28:25,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139779177] [2023-02-16 00:28:25,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139779177] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:28:25,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976707946] [2023-02-16 00:28:25,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 00:28:25,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:28:25,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:28:25,986 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) [2023-02-16 00:28:26,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 00:28:26,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 00:28:26,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:28:26,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 00:28:26,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:28:26,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 00:28:26,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:28:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 00:28:26,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976707946] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:28:26,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:28:26,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-16 00:28:26,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446053900] [2023-02-16 00:28:26,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:28:26,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 00:28:26,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:28:26,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 00:28:26,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-16 00:28:26,150 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:28:26,261 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2023-02-16 00:28:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-16 00:28:26,262 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-16 00:28:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:28:26,262 INFO L225 Difference]: With dead ends: 39 [2023-02-16 00:28:26,262 INFO L226 Difference]: Without dead ends: 35 [2023-02-16 00:28:26,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-16 00:28:26,263 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:28:26,264 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 25 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:28:26,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-16 00:28:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2023-02-16 00:28:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:26,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-02-16 00:28:26,269 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2023-02-16 00:28:26,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:28:26,270 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-02-16 00:28:26,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:26,270 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-02-16 00:28:26,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-16 00:28:26,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:28:26,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:28:26,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 00:28:26,471 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 [2023-02-16 00:28:26,472 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:28:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:28:26,473 INFO L85 PathProgramCache]: Analyzing trace with hash 666081912, now seen corresponding path program 4 times [2023-02-16 00:28:26,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:28:26,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698458847] [2023-02-16 00:28:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:28:26,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:28:26,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:28:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:28:28,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:28:28,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698458847] [2023-02-16 00:28:28,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698458847] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:28:28,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630177273] [2023-02-16 00:28:28,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 00:28:28,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:28:28,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:28:28,729 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) [2023-02-16 00:28:28,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 00:28:28,811 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 00:28:28,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:28:28,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 69 conjunts are in the unsatisfiable core [2023-02-16 00:28:28,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:28:28,833 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 [2023-02-16 00:28:28,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-16 00:28:28,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-16 00:28:29,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:29,003 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 00:28:29,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-02-16 00:28:29,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:29,169 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:28:29,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:29,180 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-02-16 00:28:29,180 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 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2023-02-16 00:28:29,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:29,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:29,337 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:28:29,346 INFO L321 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2023-02-16 00:28:29,346 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 52 [2023-02-16 00:28:29,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:29,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:29,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:29,541 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:28:29,542 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:28:29,564 INFO L321 Elim1Store]: treesize reduction 79, result has 19.4 percent of original size [2023-02-16 00:28:29,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 68 treesize of output 71 [2023-02-16 00:28:29,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:29,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:29,728 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:28:29,731 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-02-16 00:28:29,732 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 66 treesize of output 58 [2023-02-16 00:28:29,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:29,899 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:28:29,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:29,901 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 0 case distinctions, treesize of input 52 treesize of output 42 [2023-02-16 00:28:30,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:30,021 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 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2023-02-16 00:28:30,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:28:30,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-02-16 00:28:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:28:30,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:28:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:28:38,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630177273] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:28:38,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:28:38,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19, 19] total 56 [2023-02-16 00:28:38,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565583353] [2023-02-16 00:28:38,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:28:38,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-16 00:28:38,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:28:38,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-16 00:28:38,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=2662, Unknown=1, NotChecked=0, Total=3080 [2023-02-16 00:28:38,615 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 56 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:28:55,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-02-16 00:28:58,288 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 [1] [2023-02-16 00:29:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:29:00,662 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2023-02-16 00:29:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-16 00:29:00,662 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-16 00:29:00,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:29:00,663 INFO L225 Difference]: With dead ends: 57 [2023-02-16 00:29:00,663 INFO L226 Difference]: Without dead ends: 53 [2023-02-16 00:29:00,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=825, Invalid=4872, Unknown=3, NotChecked=0, Total=5700 [2023-02-16 00:29:00,665 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 72 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2023-02-16 00:29:00,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 94 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 666 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2023-02-16 00:29:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-16 00:29:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2023-02-16 00:29:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:29:00,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-02-16 00:29:00,673 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 31 [2023-02-16 00:29:00,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:29:00,674 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-02-16 00:29:00,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:29:00,674 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-02-16 00:29:00,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-16 00:29:00,675 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:29:00,675 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:29:00,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 00:29:00,877 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 [2023-02-16 00:29:00,877 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:29:00,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:29:00,877 INFO L85 PathProgramCache]: Analyzing trace with hash 207824378, now seen corresponding path program 5 times [2023-02-16 00:29:00,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:29:00,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919497725] [2023-02-16 00:29:00,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:29:00,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:29:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:29:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 00:29:00,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:29:00,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919497725] [2023-02-16 00:29:00,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919497725] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:29:00,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294606300] [2023-02-16 00:29:00,978 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 00:29:00,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:29:00,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:29:00,980 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) [2023-02-16 00:29:00,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 00:29:01,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-16 00:29:01,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:29:01,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 00:29:01,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:29:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 00:29:01,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:29:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-16 00:29:01,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294606300] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:29:01,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:29:01,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-16 00:29:01,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467267874] [2023-02-16 00:29:01,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:29:01,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 00:29:01,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:29:01,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 00:29:01,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-16 00:29:01,211 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:29:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:29:01,366 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2023-02-16 00:29:01,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-16 00:29:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-16 00:29:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:29:01,367 INFO L225 Difference]: With dead ends: 91 [2023-02-16 00:29:01,367 INFO L226 Difference]: Without dead ends: 48 [2023-02-16 00:29:01,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-16 00:29:01,368 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:29:01,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 31 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:29:01,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-16 00:29:01,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2023-02-16 00:29:01,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:29:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-02-16 00:29:01,383 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2023-02-16 00:29:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:29:01,383 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-02-16 00:29:01,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:29:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-02-16 00:29:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-16 00:29:01,384 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:29:01,384 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:29:01,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 00:29:01,590 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 [2023-02-16 00:29:01,591 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:29:01,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:29:01,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1291345410, now seen corresponding path program 6 times [2023-02-16 00:29:01,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:29:01,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025936428] [2023-02-16 00:29:01,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:29:01,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:29:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:29:01,707 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 00:29:01,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:29:01,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025936428] [2023-02-16 00:29:01,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025936428] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:29:01,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734389928] [2023-02-16 00:29:01,708 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 00:29:01,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:29:01,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:29:01,713 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) [2023-02-16 00:29:01,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 00:29:01,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-16 00:29:01,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 00:29:01,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 00:29:01,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:29:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 00:29:01,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 00:29:01,991 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-16 00:29:01,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1734389928] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 00:29:01,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 00:29:01,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-16 00:29:01,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197315616] [2023-02-16 00:29:01,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 00:29:01,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 00:29:01,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 00:29:01,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 00:29:01,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-16 00:29:01,992 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:29:02,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 00:29:02,146 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2023-02-16 00:29:02,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 00:29:02,146 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-16 00:29:02,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 00:29:02,147 INFO L225 Difference]: With dead ends: 47 [2023-02-16 00:29:02,147 INFO L226 Difference]: Without dead ends: 43 [2023-02-16 00:29:02,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-16 00:29:02,148 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 00:29:02,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 28 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 00:29:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-16 00:29:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2023-02-16 00:29:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:29:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-02-16 00:29:02,157 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 37 [2023-02-16 00:29:02,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 00:29:02,157 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-02-16 00:29:02,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 00:29:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-02-16 00:29:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-16 00:29:02,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 00:29:02,162 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 00:29:02,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 00:29:02,368 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 [2023-02-16 00:29:02,368 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 00:29:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 00:29:02,369 INFO L85 PathProgramCache]: Analyzing trace with hash 315843584, now seen corresponding path program 7 times [2023-02-16 00:29:02,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 00:29:02,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300053559] [2023-02-16 00:29:02,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 00:29:02,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 00:29:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:29:06,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:29:06,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 00:29:06,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300053559] [2023-02-16 00:29:06,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300053559] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 00:29:06,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736804101] [2023-02-16 00:29:06,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 00:29:06,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 00:29:06,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 00:29:06,289 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) [2023-02-16 00:29:06,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 00:29:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 00:29:06,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-16 00:29:06,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 00:29:06,390 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 [2023-02-16 00:29:06,398 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-02-16 00:29:06,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2023-02-16 00:29:06,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2023-02-16 00:29:06,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2023-02-16 00:29:06,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:06,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:06,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2023-02-16 00:29:06,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:06,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:06,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 56 [2023-02-16 00:29:07,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,017 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 55 treesize of output 66 [2023-02-16 00:29:07,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 76 [2023-02-16 00:29:07,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,440 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:29:07,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 88 [2023-02-16 00:29:07,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,688 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:29:07,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 86 [2023-02-16 00:29:07,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:07,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 82 [2023-02-16 00:29:08,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:08,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:08,124 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:29:08,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:08,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 87 [2023-02-16 00:29:08,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:08,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:08,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-16 00:29:08,372 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-16 00:29:08,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 91 [2023-02-16 00:29:08,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 81 [2023-02-16 00:29:08,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 31 [2023-02-16 00:29:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 00:29:08,881 INFO L328 TraceCheckSpWp]: Computing backward predicates...