./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de41.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/loops-crafted-1/in-de41.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 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 01:29:01,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 01:29:01,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 01:29:01,123 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 01:29:01,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 01:29:01,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 01:29:01,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 01:29:01,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 01:29:01,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 01:29:01,134 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 01:29:01,135 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 01:29:01,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 01:29:01,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 01:29:01,138 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 01:29:01,139 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 01:29:01,140 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 01:29:01,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 01:29:01,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 01:29:01,142 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 01:29:01,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 01:29:01,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 01:29:01,148 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 01:29:01,149 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 01:29:01,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 01:29:01,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 01:29:01,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 01:29:01,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 01:29:01,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 01:29:01,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 01:29:01,157 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 01:29:01,157 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 01:29:01,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 01:29:01,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 01:29:01,159 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 01:29:01,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 01:29:01,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 01:29:01,161 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 01:29:01,161 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 01:29:01,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 01:29:01,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 01:29:01,163 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 01:29:01,164 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 01:29:01,189 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 01:29:01,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 01:29:01,189 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 01:29:01,189 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 01:29:01,190 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 01:29:01,190 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 01:29:01,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 01:29:01,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 01:29:01,191 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 01:29:01,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 01:29:01,192 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 01:29:01,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 01:29:01,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 01:29:01,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 01:29:01,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 01:29:01,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 01:29:01,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 01:29:01,193 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 01:29:01,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 01:29:01,193 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 01:29:01,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 01:29:01,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 01:29:01,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 01:29:01,194 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 01:29:01,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:29:01,194 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 01:29:01,194 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 01:29:01,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 01:29:01,195 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 01:29:01,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 01:29:01,195 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 01:29:01,195 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 01:29:01,195 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 01:29:01,195 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 01:29:01,196 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 01:29:01,196 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 [2023-02-16 01:29:01,418 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 01:29:01,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 01:29:01,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 01:29:01,438 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 01:29:01,439 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 01:29:01,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de41.c [2023-02-16 01:29:02,497 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 01:29:02,649 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 01:29:02,649 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de41.c [2023-02-16 01:29:02,653 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32a757a0f/a1927c2ecf214a53a8b9a8b69ef2a415/FLAG2ff40df5a [2023-02-16 01:29:03,059 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32a757a0f/a1927c2ecf214a53a8b9a8b69ef2a415 [2023-02-16 01:29:03,060 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 01:29:03,062 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 01:29:03,063 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 01:29:03,063 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 01:29:03,065 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 01:29:03,065 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57a7ebb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03, skipping insertion in model container [2023-02-16 01:29:03,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,071 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 01:29:03,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 01:29:03,161 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/loops-crafted-1/in-de41.c[368,381] [2023-02-16 01:29:03,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:29:03,178 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 01:29:03,185 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/loops-crafted-1/in-de41.c[368,381] [2023-02-16 01:29:03,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:29:03,196 INFO L208 MainTranslator]: Completed translation [2023-02-16 01:29:03,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03 WrapperNode [2023-02-16 01:29:03,197 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 01:29:03,198 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 01:29:03,198 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 01:29:03,198 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 01:29:03,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,206 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,217 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2023-02-16 01:29:03,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 01:29:03,218 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 01:29:03,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 01:29:03,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 01:29:03,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,224 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,224 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,226 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,228 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,229 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,229 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,230 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 01:29:03,231 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 01:29:03,231 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 01:29:03,231 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 01:29:03,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03" (1/1) ... [2023-02-16 01:29:03,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:29:03,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:03,256 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 01:29:03,262 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 01:29:03,280 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 01:29:03,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 01:29:03,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 01:29:03,281 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 01:29:03,325 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 01:29:03,327 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 01:29:03,475 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 01:29:03,479 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 01:29:03,479 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-16 01:29:03,481 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:29:03 BoogieIcfgContainer [2023-02-16 01:29:03,481 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 01:29:03,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 01:29:03,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 01:29:03,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 01:29:03,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 01:29:03" (1/3) ... [2023-02-16 01:29:03,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352d9f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:29:03, skipping insertion in model container [2023-02-16 01:29:03,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:29:03" (2/3) ... [2023-02-16 01:29:03,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@352d9f48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:29:03, skipping insertion in model container [2023-02-16 01:29:03,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:29:03" (3/3) ... [2023-02-16 01:29:03,501 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de41.c [2023-02-16 01:29:03,512 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 01:29:03,517 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 01:29:03,560 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 01:29:03,579 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;@677804cd, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 01:29:03,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 01:29:03,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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 01:29:03,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 01:29:03,587 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:03,588 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:03,589 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:03,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:03,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1522018600, now seen corresponding path program 1 times [2023-02-16 01:29:03,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:03,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944715893] [2023-02-16 01:29:03,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:03,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:03,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:03,707 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 01:29:03,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:03,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944715893] [2023-02-16 01:29:03,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944715893] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:29:03,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:29:03,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 01:29:03,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692445334] [2023-02-16 01:29:03,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:29:03,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 01:29:03,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 01:29:03,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:29:03,735 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 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) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 01:29:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:03,745 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2023-02-16 01:29:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 01:29:03,746 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-02-16 01:29:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:03,751 INFO L225 Difference]: With dead ends: 27 [2023-02-16 01:29:03,751 INFO L226 Difference]: Without dead ends: 11 [2023-02-16 01:29:03,753 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 01:29:03,755 INFO L413 NwaCegarLoop]: 18 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, 18 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 01:29:03,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:29:03,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-16 01:29:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-16 01:29:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 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 01:29:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2023-02-16 01:29:03,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 10 [2023-02-16 01:29:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:03,774 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2023-02-16 01:29:03,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 01:29:03,774 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2023-02-16 01:29:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 01:29:03,774 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:03,775 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:03,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 01:29:03,775 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:03,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:03,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1522137764, now seen corresponding path program 1 times [2023-02-16 01:29:03,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:03,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97468060] [2023-02-16 01:29:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:03,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:04,104 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 01:29:04,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:04,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97468060] [2023-02-16 01:29:04,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97468060] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:29:04,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:29:04,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-16 01:29:04,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39940454] [2023-02-16 01:29:04,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:29:04,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-16 01:29:04,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:04,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-16 01:29:04,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 01:29:04,107 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 01:29:04,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:04,180 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2023-02-16 01:29:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-16 01:29:04,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-02-16 01:29:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:04,182 INFO L225 Difference]: With dead ends: 29 [2023-02-16 01:29:04,182 INFO L226 Difference]: Without dead ends: 17 [2023-02-16 01:29:04,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-02-16 01:29:04,186 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:04,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 22 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:29:04,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-16 01:29:04,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-16 01:29:04,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 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 01:29:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-02-16 01:29:04,196 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2023-02-16 01:29:04,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:04,198 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-02-16 01:29:04,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 01:29:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-02-16 01:29:04,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-16 01:29:04,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:04,200 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:04,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 01:29:04,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:04,204 INFO L85 PathProgramCache]: Analyzing trace with hash 923648321, now seen corresponding path program 1 times [2023-02-16 01:29:04,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:04,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25560466] [2023-02-16 01:29:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:04,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:04,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:29:04,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:04,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25560466] [2023-02-16 01:29:04,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25560466] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:04,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586256194] [2023-02-16 01:29:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:04,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:04,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:04,268 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 01:29:04,272 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 01:29:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:04,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-16 01:29:04,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:04,373 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:29:04,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:29:04,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586256194] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:04,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:04,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-16 01:29:04,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092545365] [2023-02-16 01:29:04,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:04,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-16 01:29:04,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:04,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-16 01:29:04,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-02-16 01:29:04,415 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:04,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:04,548 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2023-02-16 01:29:04,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 01:29:04,549 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-16 01:29:04,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:04,551 INFO L225 Difference]: With dead ends: 65 [2023-02-16 01:29:04,551 INFO L226 Difference]: Without dead ends: 59 [2023-02-16 01:29:04,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-02-16 01:29:04,554 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:04,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 62 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:29:04,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-16 01:29:04,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2023-02-16 01:29:04,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:04,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2023-02-16 01:29:04,575 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 11 [2023-02-16 01:29:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:04,575 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2023-02-16 01:29:04,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:04,575 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2023-02-16 01:29:04,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 01:29:04,576 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:04,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:04,583 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 01:29:04,783 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 01:29:04,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:04,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:04,785 INFO L85 PathProgramCache]: Analyzing trace with hash -491381764, now seen corresponding path program 1 times [2023-02-16 01:29:04,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:04,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24510675] [2023-02-16 01:29:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:04,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:29:04,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:04,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24510675] [2023-02-16 01:29:04,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24510675] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:29:04,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:29:04,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 01:29:04,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547864767] [2023-02-16 01:29:04,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:29:04,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:29:04,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:04,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:29:04,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:29:04,846 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 01:29:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:04,884 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2023-02-16 01:29:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 01:29:04,884 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-16 01:29:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:04,885 INFO L225 Difference]: With dead ends: 34 [2023-02-16 01:29:04,885 INFO L226 Difference]: Without dead ends: 24 [2023-02-16 01:29:04,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:29:04,890 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:04,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:29:04,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-16 01:29:04,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-16 01:29:04,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 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 01:29:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2023-02-16 01:29:04,900 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 12 [2023-02-16 01:29:04,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:04,900 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2023-02-16 01:29:04,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 01:29:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2023-02-16 01:29:04,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-16 01:29:04,901 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:04,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:04,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-16 01:29:04,902 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:04,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:04,902 INFO L85 PathProgramCache]: Analyzing trace with hash 607187538, now seen corresponding path program 1 times [2023-02-16 01:29:04,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:04,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472932192] [2023-02-16 01:29:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:04,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:29:04,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:04,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472932192] [2023-02-16 01:29:04,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472932192] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:04,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125064070] [2023-02-16 01:29:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:04,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:04,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:05,001 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 01:29:05,028 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 01:29:05,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:05,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 01:29:05,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:29:05,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:29:05,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125064070] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:05,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:05,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-16 01:29:05,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238243625] [2023-02-16 01:29:05,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:05,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:29:05,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:05,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:29:05,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:29:05,133 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 01:29:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:05,161 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2023-02-16 01:29:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 01:29:05,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 13 [2023-02-16 01:29:05,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:05,163 INFO L225 Difference]: With dead ends: 39 [2023-02-16 01:29:05,163 INFO L226 Difference]: Without dead ends: 35 [2023-02-16 01:29:05,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:29:05,164 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:05,164 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:29:05,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-16 01:29:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-02-16 01:29:05,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:05,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2023-02-16 01:29:05,172 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 13 [2023-02-16 01:29:05,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:05,172 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2023-02-16 01:29:05,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 01:29:05,172 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2023-02-16 01:29:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 01:29:05,173 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:05,173 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:05,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-16 01:29:05,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:05,378 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:05,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:05,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1644609900, now seen corresponding path program 1 times [2023-02-16 01:29:05,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:05,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937395601] [2023-02-16 01:29:05,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:05,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:05,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:29:05,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:05,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937395601] [2023-02-16 01:29:05,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937395601] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:05,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166747001] [2023-02-16 01:29:05,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:05,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:05,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:05,745 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 01:29:05,777 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 01:29:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:05,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 01:29:05,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:05,956 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 01:29:05,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:29:06,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166747001] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:06,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:06,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 16 [2023-02-16 01:29:06,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057284562] [2023-02-16 01:29:06,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:06,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 01:29:06,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:06,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 01:29:06,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-02-16 01:29:06,156 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:06,666 INFO L93 Difference]: Finished difference Result 71 states and 92 transitions. [2023-02-16 01:29:06,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 01:29:06,667 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-16 01:29:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:06,668 INFO L225 Difference]: With dead ends: 71 [2023-02-16 01:29:06,668 INFO L226 Difference]: Without dead ends: 65 [2023-02-16 01:29:06,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=556, Unknown=0, NotChecked=0, Total=756 [2023-02-16 01:29:06,668 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 61 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:06,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 66 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:29:06,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-16 01:29:06,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 37. [2023-02-16 01:29:06,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:06,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 53 transitions. [2023-02-16 01:29:06,677 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 53 transitions. Word has length 14 [2023-02-16 01:29:06,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:06,677 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 53 transitions. [2023-02-16 01:29:06,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:06,678 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 53 transitions. [2023-02-16 01:29:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 01:29:06,678 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:06,678 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:06,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-16 01:29:06,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:06,883 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:06,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:06,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2067097458, now seen corresponding path program 2 times [2023-02-16 01:29:06,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:06,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472075778] [2023-02-16 01:29:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:06,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:06,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:29:06,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:06,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472075778] [2023-02-16 01:29:06,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472075778] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:06,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014224204] [2023-02-16 01:29:06,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:29:06,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:06,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:06,930 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 01:29:06,932 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 01:29:06,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:29:06,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:06,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-16 01:29:06,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:29:06,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-16 01:29:07,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014224204] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:07,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:07,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-02-16 01:29:07,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574528409] [2023-02-16 01:29:07,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:07,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:29:07,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:07,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:29:07,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:29:07,040 INFO L87 Difference]: Start difference. First operand 37 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 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 01:29:07,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:07,136 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2023-02-16 01:29:07,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-16 01:29:07,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 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 14 [2023-02-16 01:29:07,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:07,136 INFO L225 Difference]: With dead ends: 74 [2023-02-16 01:29:07,137 INFO L226 Difference]: Without dead ends: 63 [2023-02-16 01:29:07,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-02-16 01:29:07,137 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:07,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 70 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:29:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-16 01:29:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2023-02-16 01:29:07,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:07,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2023-02-16 01:29:07,158 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 14 [2023-02-16 01:29:07,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:07,158 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2023-02-16 01:29:07,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 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 01:29:07,159 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2023-02-16 01:29:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-02-16 01:29:07,159 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:07,159 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:07,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-16 01:29:07,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:07,364 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:07,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:07,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1219996004, now seen corresponding path program 2 times [2023-02-16 01:29:07,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:07,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877734147] [2023-02-16 01:29:07,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:07,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:07,430 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:29:07,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:07,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877734147] [2023-02-16 01:29:07,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877734147] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:07,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215980294] [2023-02-16 01:29:07,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:29:07,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:07,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:07,446 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 01:29:07,494 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 01:29:07,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:29:07,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:07,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-16 01:29:07,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:29:07,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:07,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:29:07,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215980294] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:07,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:07,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-16 01:29:07,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34045779] [2023-02-16 01:29:07,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:07,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-16 01:29:07,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:07,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-16 01:29:07,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-02-16 01:29:07,592 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:08,138 INFO L93 Difference]: Finished difference Result 166 states and 229 transitions. [2023-02-16 01:29:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-16 01:29:08,138 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-02-16 01:29:08,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:08,139 INFO L225 Difference]: With dead ends: 166 [2023-02-16 01:29:08,139 INFO L226 Difference]: Without dead ends: 156 [2023-02-16 01:29:08,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2023-02-16 01:29:08,140 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 303 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:08,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 182 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:29:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-16 01:29:08,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 60. [2023-02-16 01:29:08,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:08,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2023-02-16 01:29:08,174 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 14 [2023-02-16 01:29:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:08,174 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2023-02-16 01:29:08,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:08,175 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2023-02-16 01:29:08,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-16 01:29:08,176 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:08,176 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:08,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-16 01:29:08,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:08,398 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:08,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:08,398 INFO L85 PathProgramCache]: Analyzing trace with hash -555035246, now seen corresponding path program 2 times [2023-02-16 01:29:08,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:08,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856635631] [2023-02-16 01:29:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:08,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:29:08,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:08,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856635631] [2023-02-16 01:29:08,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856635631] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:08,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275831973] [2023-02-16 01:29:08,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:29:08,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:08,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:08,471 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 01:29:08,526 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 01:29:08,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:29:08,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:08,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 01:29:08,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:29:08,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:29:08,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275831973] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:08,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:08,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-02-16 01:29:08,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038374730] [2023-02-16 01:29:08,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:08,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:29:08,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:08,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:29:08,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:29:08,570 INFO L87 Difference]: Start difference. First operand 60 states and 83 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 01:29:08,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:08,593 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2023-02-16 01:29:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-16 01:29:08,593 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 01:29:08,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:08,594 INFO L225 Difference]: With dead ends: 70 [2023-02-16 01:29:08,594 INFO L226 Difference]: Without dead ends: 58 [2023-02-16 01:29:08,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:29:08,595 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:08,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:29:08,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-16 01:29:08,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-02-16 01:29:08,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 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 01:29:08,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2023-02-16 01:29:08,609 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 15 [2023-02-16 01:29:08,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:08,609 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2023-02-16 01:29:08,609 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 01:29:08,610 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2023-02-16 01:29:08,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 01:29:08,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:08,610 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:08,617 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 01:29:08,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:08,815 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:08,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:08,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1176713020, now seen corresponding path program 3 times [2023-02-16 01:29:08,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:08,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572972856] [2023-02-16 01:29:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:08,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 01:29:08,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:08,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572972856] [2023-02-16 01:29:08,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572972856] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:08,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988082488] [2023-02-16 01:29:08,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:29:08,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:08,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:08,871 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 01:29:08,872 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 01:29:08,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 01:29:08,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:08,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 01:29:08,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 01:29:08,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 01:29:08,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988082488] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:08,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:08,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-02-16 01:29:08,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723465128] [2023-02-16 01:29:08,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:08,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 01:29:08,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:08,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 01:29:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-16 01:29:08,978 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 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 01:29:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:09,128 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2023-02-16 01:29:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 01:29:09,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-16 01:29:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:09,129 INFO L225 Difference]: With dead ends: 109 [2023-02-16 01:29:09,129 INFO L226 Difference]: Without dead ends: 93 [2023-02-16 01:29:09,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-16 01:29:09,130 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 38 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:09,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 112 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:29:09,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-16 01:29:09,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2023-02-16 01:29:09,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:09,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2023-02-16 01:29:09,144 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 16 [2023-02-16 01:29:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:09,144 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2023-02-16 01:29:09,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 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 01:29:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2023-02-16 01:29:09,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 01:29:09,144 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:09,145 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:09,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-16 01:29:09,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:09,350 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:09,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:09,350 INFO L85 PathProgramCache]: Analyzing trace with hash 720326044, now seen corresponding path program 3 times [2023-02-16 01:29:09,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:09,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409773604] [2023-02-16 01:29:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:09,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:09,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:29:09,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:09,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409773604] [2023-02-16 01:29:09,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409773604] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:09,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135003316] [2023-02-16 01:29:09,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:29:09,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:09,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:09,404 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:29:09,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 01:29:09,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-16 01:29:09,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:09,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-16 01:29:09,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:29:09,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:29:09,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135003316] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:09,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:09,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2023-02-16 01:29:09,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358433671] [2023-02-16 01:29:09,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:09,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-16 01:29:09,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:09,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-16 01:29:09,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-16 01:29:09,490 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:09,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:09,535 INFO L93 Difference]: Finished difference Result 77 states and 108 transitions. [2023-02-16 01:29:09,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-16 01:29:09,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-16 01:29:09,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:09,536 INFO L225 Difference]: With dead ends: 77 [2023-02-16 01:29:09,536 INFO L226 Difference]: Without dead ends: 73 [2023-02-16 01:29:09,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-16 01:29:09,537 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:09,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 48 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:29:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-16 01:29:09,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-02-16 01:29:09,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 70 states have internal predecessors, (99), 0 states have call successors, (0), 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 01:29:09,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2023-02-16 01:29:09,554 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 99 transitions. Word has length 16 [2023-02-16 01:29:09,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:09,554 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 99 transitions. [2023-02-16 01:29:09,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:09,554 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 99 transitions. [2023-02-16 01:29:09,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-16 01:29:09,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:09,555 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:09,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 01:29:09,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-16 01:29:09,761 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:09,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:09,761 INFO L85 PathProgramCache]: Analyzing trace with hash 796886620, now seen corresponding path program 4 times [2023-02-16 01:29:09,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:09,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3213203] [2023-02-16 01:29:09,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:09,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:10,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:29:10,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:10,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3213203] [2023-02-16 01:29:10,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3213203] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:10,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084245846] [2023-02-16 01:29:10,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:29:10,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:10,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:10,097 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:29:10,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 01:29:10,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:29:10,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:10,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 01:29:10,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:11,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:29:11,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:11,638 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-16 01:29:11,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084245846] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:11,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:11,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 18 [2023-02-16 01:29:11,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480599605] [2023-02-16 01:29:11,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:11,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 01:29:11,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:11,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 01:29:11,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-02-16 01:29:11,639 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. Second operand has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 01:29:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:12,890 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2023-02-16 01:29:12,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-16 01:29:12,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 18 [2023-02-16 01:29:12,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:12,891 INFO L225 Difference]: With dead ends: 137 [2023-02-16 01:29:12,891 INFO L226 Difference]: Without dead ends: 127 [2023-02-16 01:29:12,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2023-02-16 01:29:12,892 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:12,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 93 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:29:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-16 01:29:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 91. [2023-02-16 01:29:12,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.3888888888888888) internal successors, (125), 90 states have internal predecessors, (125), 0 states have call successors, (0), 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 01:29:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 125 transitions. [2023-02-16 01:29:12,933 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 125 transitions. Word has length 18 [2023-02-16 01:29:12,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:12,934 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 125 transitions. [2023-02-16 01:29:12,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 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 01:29:12,934 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 125 transitions. [2023-02-16 01:29:12,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-16 01:29:12,936 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:12,936 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:12,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 01:29:13,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:13,142 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:13,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:13,142 INFO L85 PathProgramCache]: Analyzing trace with hash -922594724, now seen corresponding path program 4 times [2023-02-16 01:29:13,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:13,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041139751] [2023-02-16 01:29:13,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:13,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:13,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 01:29:13,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:13,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041139751] [2023-02-16 01:29:13,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041139751] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:13,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487506812] [2023-02-16 01:29:13,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:29:13,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:13,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:13,219 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:29:13,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 01:29:13,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:29:13,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:13,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-16 01:29:13,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 01:29:13,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:13,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-16 01:29:13,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487506812] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:13,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:13,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-02-16 01:29:13,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742876257] [2023-02-16 01:29:13,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:13,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 01:29:13,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:13,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 01:29:13,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-02-16 01:29:13,394 INFO L87 Difference]: Start difference. First operand 91 states and 125 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 01:29:13,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:13,623 INFO L93 Difference]: Finished difference Result 141 states and 177 transitions. [2023-02-16 01:29:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 01:29:13,624 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-16 01:29:13,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:13,624 INFO L225 Difference]: With dead ends: 141 [2023-02-16 01:29:13,624 INFO L226 Difference]: Without dead ends: 125 [2023-02-16 01:29:13,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2023-02-16 01:29:13,625 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 119 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:13,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 104 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:29:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-16 01:29:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 80. [2023-02-16 01:29:13,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.3544303797468353) internal successors, (107), 79 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2023-02-16 01:29:13,651 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 18 [2023-02-16 01:29:13,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:13,651 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2023-02-16 01:29:13,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 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 01:29:13,651 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2023-02-16 01:29:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 01:29:13,652 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:13,652 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:13,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-16 01:29:13,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-16 01:29:13,853 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:13,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:13,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1064653150, now seen corresponding path program 5 times [2023-02-16 01:29:13,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:13,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059070784] [2023-02-16 01:29:13,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:13,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:29:13,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:13,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059070784] [2023-02-16 01:29:13,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059070784] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:13,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489499684] [2023-02-16 01:29:13,903 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:29:13,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:13,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:13,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:29:13,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 01:29:13,942 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-16 01:29:13,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:13,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-16 01:29:13,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:13,957 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:29:13,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:29:13,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489499684] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:13,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:13,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2023-02-16 01:29:13,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301151843] [2023-02-16 01:29:13,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:13,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 01:29:13,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:13,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 01:29:13,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:29:13,978 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:14,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:14,038 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2023-02-16 01:29:14,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 01:29:14,038 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-16 01:29:14,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:14,039 INFO L225 Difference]: With dead ends: 88 [2023-02-16 01:29:14,039 INFO L226 Difference]: Without dead ends: 73 [2023-02-16 01:29:14,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:29:14,040 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:14,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 49 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:29:14,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-16 01:29:14,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2023-02-16 01:29:14,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.3857142857142857) internal successors, (97), 70 states have internal predecessors, (97), 0 states have call successors, (0), 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 01:29:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 97 transitions. [2023-02-16 01:29:14,065 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 97 transitions. Word has length 19 [2023-02-16 01:29:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:14,065 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 97 transitions. [2023-02-16 01:29:14,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 97 transitions. [2023-02-16 01:29:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 01:29:14,067 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:14,067 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:14,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 01:29:14,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-16 01:29:14,272 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:14,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:14,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1610400402, now seen corresponding path program 5 times [2023-02-16 01:29:14,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:14,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93985889] [2023-02-16 01:29:14,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:14,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:14,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:14,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:29:14,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:14,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93985889] [2023-02-16 01:29:14,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93985889] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:14,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8849212] [2023-02-16 01:29:14,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:29:14,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:14,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:14,366 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:29:14,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 01:29:14,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-02-16 01:29:14,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:14,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-16 01:29:14,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:14,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:29:14,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:14,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:29:14,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8849212] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:14,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:14,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2023-02-16 01:29:14,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42998351] [2023-02-16 01:29:14,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:14,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-16 01:29:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:14,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-16 01:29:14,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-16 01:29:14,488 INFO L87 Difference]: Start difference. First operand 71 states and 97 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:14,565 INFO L93 Difference]: Finished difference Result 95 states and 132 transitions. [2023-02-16 01:29:14,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 01:29:14,566 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-16 01:29:14,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:14,566 INFO L225 Difference]: With dead ends: 95 [2023-02-16 01:29:14,566 INFO L226 Difference]: Without dead ends: 91 [2023-02-16 01:29:14,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-16 01:29:14,572 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:14,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 69 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:29:14,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-16 01:29:14,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2023-02-16 01:29:14,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3793103448275863) internal successors, (120), 87 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:14,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 120 transitions. [2023-02-16 01:29:14,608 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 120 transitions. Word has length 19 [2023-02-16 01:29:14,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:14,608 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 120 transitions. [2023-02-16 01:29:14,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:14,608 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 120 transitions. [2023-02-16 01:29:14,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-16 01:29:14,609 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:14,609 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:14,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 01:29:14,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-16 01:29:14,814 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:14,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:14,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1793951343, now seen corresponding path program 6 times [2023-02-16 01:29:14,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:14,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866036618] [2023-02-16 01:29:14,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:14,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:14,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:29:14,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:14,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866036618] [2023-02-16 01:29:14,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866036618] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:14,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046426543] [2023-02-16 01:29:14,946 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:29:14,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:14,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:14,947 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:29:14,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 01:29:14,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-16 01:29:14,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:14,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-16 01:29:14,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:29:15,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:15,150 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:29:15,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046426543] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:15,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:15,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-02-16 01:29:15,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540184710] [2023-02-16 01:29:15,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:15,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-16 01:29:15,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-16 01:29:15,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2023-02-16 01:29:15,164 INFO L87 Difference]: Start difference. First operand 88 states and 120 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 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 01:29:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:19,010 INFO L93 Difference]: Finished difference Result 366 states and 470 transitions. [2023-02-16 01:29:19,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-16 01:29:19,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 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 19 [2023-02-16 01:29:19,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:19,019 INFO L225 Difference]: With dead ends: 366 [2023-02-16 01:29:19,019 INFO L226 Difference]: Without dead ends: 340 [2023-02-16 01:29:19,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1448, Invalid=3954, Unknown=0, NotChecked=0, Total=5402 [2023-02-16 01:29:19,023 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 533 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:19,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 368 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 01:29:19,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2023-02-16 01:29:19,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 105. [2023-02-16 01:29:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.375) internal successors, (143), 104 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:19,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 143 transitions. [2023-02-16 01:29:19,099 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 143 transitions. Word has length 19 [2023-02-16 01:29:19,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:19,099 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 143 transitions. [2023-02-16 01:29:19,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 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 01:29:19,100 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 143 transitions. [2023-02-16 01:29:19,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-16 01:29:19,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:19,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:19,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-16 01:29:19,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-16 01:29:19,303 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:19,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:19,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1979130930, now seen corresponding path program 7 times [2023-02-16 01:29:19,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:19,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874115477] [2023-02-16 01:29:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:19,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:19,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 01:29:19,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:19,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874115477] [2023-02-16 01:29:19,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874115477] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:19,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741081644] [2023-02-16 01:29:19,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:29:19,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:19,409 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:29:19,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 01:29:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:19,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-16 01:29:19,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:19,489 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 01:29:19,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:19,560 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 01:29:19,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741081644] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:19,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:19,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2023-02-16 01:29:19,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782929948] [2023-02-16 01:29:19,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:19,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 01:29:19,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:19,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 01:29:19,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-02-16 01:29:19,561 INFO L87 Difference]: Start difference. First operand 105 states and 143 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:19,832 INFO L93 Difference]: Finished difference Result 187 states and 228 transitions. [2023-02-16 01:29:19,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-16 01:29:19,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-16 01:29:19,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:19,833 INFO L225 Difference]: With dead ends: 187 [2023-02-16 01:29:19,833 INFO L226 Difference]: Without dead ends: 167 [2023-02-16 01:29:19,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-02-16 01:29:19,834 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 65 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:19,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 172 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:29:19,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-16 01:29:19,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 101. [2023-02-16 01:29:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.35) internal successors, (135), 100 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2023-02-16 01:29:19,876 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 20 [2023-02-16 01:29:19,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:19,878 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2023-02-16 01:29:19,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:19,878 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2023-02-16 01:29:19,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 01:29:19,878 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:19,878 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:19,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-16 01:29:20,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:20,084 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:20,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:20,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1987539476, now seen corresponding path program 8 times [2023-02-16 01:29:20,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:20,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80848418] [2023-02-16 01:29:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:20,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-16 01:29:20,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:20,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80848418] [2023-02-16 01:29:20,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80848418] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:20,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317987680] [2023-02-16 01:29:20,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:29:20,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:20,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:20,413 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:29:20,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 01:29:20,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:29:20,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:20,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-16 01:29:20,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:20,824 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:29:20,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:29:21,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317987680] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:21,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:21,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 13] total 34 [2023-02-16 01:29:21,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849898050] [2023-02-16 01:29:21,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:21,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 01:29:21,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:21,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 01:29:21,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=926, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 01:29:21,255 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:23,868 INFO L93 Difference]: Finished difference Result 186 states and 235 transitions. [2023-02-16 01:29:23,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-16 01:29:23,869 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-16 01:29:23,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:23,872 INFO L225 Difference]: With dead ends: 186 [2023-02-16 01:29:23,872 INFO L226 Difference]: Without dead ends: 167 [2023-02-16 01:29:23,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=698, Invalid=3208, Unknown=0, NotChecked=0, Total=3906 [2023-02-16 01:29:23,875 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 133 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:23,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 169 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 01:29:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-16 01:29:23,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 123. [2023-02-16 01:29:23,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.3442622950819672) internal successors, (164), 122 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:23,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 164 transitions. [2023-02-16 01:29:23,926 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 164 transitions. Word has length 22 [2023-02-16 01:29:23,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:23,927 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 164 transitions. [2023-02-16 01:29:23,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:23,927 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 164 transitions. [2023-02-16 01:29:23,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 01:29:23,927 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:23,927 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:23,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-16 01:29:24,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-16 01:29:24,132 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:24,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:24,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1562904434, now seen corresponding path program 6 times [2023-02-16 01:29:24,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:24,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218058428] [2023-02-16 01:29:24,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:24,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 01:29:24,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:24,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218058428] [2023-02-16 01:29:24,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218058428] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:24,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357424089] [2023-02-16 01:29:24,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:29:24,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:24,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:24,221 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:29:24,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 01:29:24,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-16 01:29:24,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:24,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-16 01:29:24,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 01:29:24,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-16 01:29:24,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357424089] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:24,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:24,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-02-16 01:29:24,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300950146] [2023-02-16 01:29:24,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:24,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 01:29:24,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:24,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 01:29:24,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2023-02-16 01:29:24,476 INFO L87 Difference]: Start difference. First operand 123 states and 164 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:24,798 INFO L93 Difference]: Finished difference Result 164 states and 207 transitions. [2023-02-16 01:29:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-16 01:29:24,798 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-16 01:29:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:24,799 INFO L225 Difference]: With dead ends: 164 [2023-02-16 01:29:24,799 INFO L226 Difference]: Without dead ends: 139 [2023-02-16 01:29:24,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2023-02-16 01:29:24,800 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 136 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:24,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 105 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:29:24,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-16 01:29:24,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 101. [2023-02-16 01:29:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.34) internal successors, (134), 100 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:24,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 134 transitions. [2023-02-16 01:29:24,836 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 134 transitions. Word has length 22 [2023-02-16 01:29:24,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:24,837 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 134 transitions. [2023-02-16 01:29:24,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:24,837 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 134 transitions. [2023-02-16 01:29:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-16 01:29:24,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:24,838 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:24,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-16 01:29:25,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:25,043 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:25,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:25,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1894811100, now seen corresponding path program 7 times [2023-02-16 01:29:25,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:25,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648193186] [2023-02-16 01:29:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:25,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 01:29:25,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:25,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648193186] [2023-02-16 01:29:25,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648193186] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:25,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055371411] [2023-02-16 01:29:25,152 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:29:25,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:25,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:25,153 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:29:25,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 01:29:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:25,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-16 01:29:25,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:25,253 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 01:29:25,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:25,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 01:29:25,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055371411] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:25,282 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:25,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2023-02-16 01:29:25,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607809701] [2023-02-16 01:29:25,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:25,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 01:29:25,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:25,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 01:29:25,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:29:25,283 INFO L87 Difference]: Start difference. First operand 101 states and 134 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 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 01:29:25,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:25,415 INFO L93 Difference]: Finished difference Result 131 states and 178 transitions. [2023-02-16 01:29:25,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-16 01:29:25,415 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 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 22 [2023-02-16 01:29:25,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:25,416 INFO L225 Difference]: With dead ends: 131 [2023-02-16 01:29:25,416 INFO L226 Difference]: Without dead ends: 127 [2023-02-16 01:29:25,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:29:25,416 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:25,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 124 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:29:25,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-16 01:29:25,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 120. [2023-02-16 01:29:25,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.3445378151260505) internal successors, (160), 119 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 160 transitions. [2023-02-16 01:29:25,455 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 160 transitions. Word has length 22 [2023-02-16 01:29:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:25,455 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 160 transitions. [2023-02-16 01:29:25,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 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 01:29:25,455 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 160 transitions. [2023-02-16 01:29:25,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 01:29:25,456 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:25,456 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:25,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-16 01:29:25,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:25,660 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:25,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:25,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1912260034, now seen corresponding path program 8 times [2023-02-16 01:29:25,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:25,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666947082] [2023-02-16 01:29:25,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:25,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:25,786 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 01:29:25,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:25,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666947082] [2023-02-16 01:29:25,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666947082] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:25,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314709322] [2023-02-16 01:29:25,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:29:25,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:25,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:25,788 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:29:25,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-16 01:29:25,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:29:25,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:25,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-16 01:29:25,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 01:29:25,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:26,207 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 01:29:26,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314709322] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:26,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:26,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2023-02-16 01:29:26,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816113882] [2023-02-16 01:29:26,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:26,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-16 01:29:26,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:26,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-16 01:29:26,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2023-02-16 01:29:26,210 INFO L87 Difference]: Start difference. First operand 120 states and 160 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 01:29:27,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:29:27,196 INFO L93 Difference]: Finished difference Result 273 states and 328 transitions. [2023-02-16 01:29:27,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-16 01:29:27,197 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 23 [2023-02-16 01:29:27,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:29:27,198 INFO L225 Difference]: With dead ends: 273 [2023-02-16 01:29:27,198 INFO L226 Difference]: Without dead ends: 247 [2023-02-16 01:29:27,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=489, Invalid=1863, Unknown=0, NotChecked=0, Total=2352 [2023-02-16 01:29:27,200 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 259 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:29:27,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 169 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:29:27,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-02-16 01:29:27,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 137. [2023-02-16 01:29:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.3088235294117647) internal successors, (178), 136 states have internal predecessors, (178), 0 states have call successors, (0), 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 01:29:27,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2023-02-16 01:29:27,260 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 23 [2023-02-16 01:29:27,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:29:27,261 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2023-02-16 01:29:27,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 01:29:27,261 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2023-02-16 01:29:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-16 01:29:27,261 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:29:27,261 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:29:27,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-16 01:29:27,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:27,467 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:29:27,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:29:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1236870529, now seen corresponding path program 3 times [2023-02-16 01:29:27,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:29:27,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550191737] [2023-02-16 01:29:27,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:29:27,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:29:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:29:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:29:27,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:29:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550191737] [2023-02-16 01:29:27,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550191737] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:29:27,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072235421] [2023-02-16 01:29:27,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:29:27,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:29:27,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:29:27,643 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:29:27,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-16 01:29:27,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-16 01:29:27,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:29:27,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 01:29:27,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:29:27,804 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:29:27,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:29:28,124 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:29:28,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072235421] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:29:28,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:29:28,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-16 01:29:28,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333946019] [2023-02-16 01:29:28,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:29:28,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-16 01:29:28,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:29:28,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-16 01:29:28,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2023-02-16 01:29:28,125 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:29:42,518 WARN L233 SmtUtils]: Spent 5.83s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:30:06,246 WARN L233 SmtUtils]: Spent 5.23s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:30:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:29,234 INFO L93 Difference]: Finished difference Result 846 states and 1129 transitions. [2023-02-16 01:30:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-16 01:30:29,235 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-16 01:30:29,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:29,251 INFO L225 Difference]: With dead ends: 846 [2023-02-16 01:30:29,251 INFO L226 Difference]: Without dead ends: 807 [2023-02-16 01:30:29,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 59.1s TimeCoverageRelationStatistics Valid=2101, Invalid=4705, Unknown=0, NotChecked=0, Total=6806 [2023-02-16 01:30:29,260 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1428 mSDsluCounter, 994 mSDsCounter, 0 mSdLazyCounter, 1332 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1428 SdHoareTripleChecker+Valid, 1058 SdHoareTripleChecker+Invalid, 1825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 1332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:29,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1428 Valid, 1058 Invalid, 1825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 1332 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-02-16 01:30:29,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2023-02-16 01:30:29,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 199. [2023-02-16 01:30:29,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.3636363636363635) internal successors, (270), 198 states have internal predecessors, (270), 0 states have call successors, (0), 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 01:30:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 270 transitions. [2023-02-16 01:30:29,347 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 270 transitions. Word has length 23 [2023-02-16 01:30:29,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:29,348 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 270 transitions. [2023-02-16 01:30:29,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:29,348 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 270 transitions. [2023-02-16 01:30:29,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-16 01:30:29,348 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:29,349 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:29,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:29,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:29,553 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:29,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:29,554 INFO L85 PathProgramCache]: Analyzing trace with hash -510369070, now seen corresponding path program 9 times [2023-02-16 01:30:29,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:29,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392690159] [2023-02-16 01:30:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:29,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:29,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 01:30:29,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:29,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392690159] [2023-02-16 01:30:29,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392690159] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:29,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568083526] [2023-02-16 01:30:29,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:30:29,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:29,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:29,749 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:29,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-16 01:30:29,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 01:30:29,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:29,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-16 01:30:29,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:29,878 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 01:30:29,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-16 01:30:29,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568083526] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:29,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:29,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 17 [2023-02-16 01:30:29,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347339925] [2023-02-16 01:30:29,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:29,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-16 01:30:29,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-16 01:30:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-02-16 01:30:29,914 INFO L87 Difference]: Start difference. First operand 199 states and 270 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 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 01:30:30,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:30,119 INFO L93 Difference]: Finished difference Result 245 states and 338 transitions. [2023-02-16 01:30:30,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-16 01:30:30,119 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 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 01:30:30,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:30,120 INFO L225 Difference]: With dead ends: 245 [2023-02-16 01:30:30,120 INFO L226 Difference]: Without dead ends: 241 [2023-02-16 01:30:30,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2023-02-16 01:30:30,121 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:30,121 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 160 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:30:30,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-02-16 01:30:30,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 232. [2023-02-16 01:30:30,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.367965367965368) internal successors, (316), 231 states have internal predecessors, (316), 0 states have call successors, (0), 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 01:30:30,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 316 transitions. [2023-02-16 01:30:30,228 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 316 transitions. Word has length 25 [2023-02-16 01:30:30,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:30,228 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 316 transitions. [2023-02-16 01:30:30,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 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 01:30:30,229 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 316 transitions. [2023-02-16 01:30:30,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 01:30:30,229 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:30,229 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:30,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-16 01:30:30,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-16 01:30:30,431 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:30,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:30,433 INFO L85 PathProgramCache]: Analyzing trace with hash -955275428, now seen corresponding path program 9 times [2023-02-16 01:30:30,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:30,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611198348] [2023-02-16 01:30:30,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:30,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:30,831 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 01:30:30,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:30,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611198348] [2023-02-16 01:30:30,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611198348] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:30,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029661038] [2023-02-16 01:30:30,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:30:30,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:30,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:30,833 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:30,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-16 01:30:30,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-16 01:30:30,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:30,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-16 01:30:30,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:30:45,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-16 01:30:45,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029661038] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:45,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:45,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 13] total 30 [2023-02-16 01:30:45,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453083776] [2023-02-16 01:30:45,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:45,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-16 01:30:45,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:45,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-16 01:30:45,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2023-02-16 01:30:45,659 INFO L87 Difference]: Start difference. First operand 232 states and 316 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:49,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:49,300 INFO L93 Difference]: Finished difference Result 342 states and 426 transitions. [2023-02-16 01:30:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-16 01:30:49,300 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-16 01:30:49,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:49,301 INFO L225 Difference]: With dead ends: 342 [2023-02-16 01:30:49,302 INFO L226 Difference]: Without dead ends: 338 [2023-02-16 01:30:49,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 01:30:49,302 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 48 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:49,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 88 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 01:30:49,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-02-16 01:30:49,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 232. [2023-02-16 01:30:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.367965367965368) internal successors, (316), 231 states have internal predecessors, (316), 0 states have call successors, (0), 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 01:30:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 316 transitions. [2023-02-16 01:30:49,422 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 316 transitions. Word has length 26 [2023-02-16 01:30:49,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:49,422 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 316 transitions. [2023-02-16 01:30:49,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 316 transitions. [2023-02-16 01:30:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 01:30:49,423 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:49,423 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:49,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:49,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-16 01:30:49,628 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:49,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:49,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1118982868, now seen corresponding path program 10 times [2023-02-16 01:30:49,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:49,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956748322] [2023-02-16 01:30:49,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:49,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:49,738 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 01:30:49,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:49,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956748322] [2023-02-16 01:30:49,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956748322] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:49,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084363502] [2023-02-16 01:30:49,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:30:49,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:49,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:49,749 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:49,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-16 01:30:49,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:30:49,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:49,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-16 01:30:49,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-16 01:30:49,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-16 01:30:50,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084363502] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:50,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:50,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 24 [2023-02-16 01:30:50,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070315898] [2023-02-16 01:30:50,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:50,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 01:30:50,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:50,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 01:30:50,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-02-16 01:30:50,003 INFO L87 Difference]: Start difference. First operand 232 states and 316 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 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 01:30:50,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:50,868 INFO L93 Difference]: Finished difference Result 400 states and 486 transitions. [2023-02-16 01:30:50,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-16 01:30:50,868 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-02-16 01:30:50,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:50,869 INFO L225 Difference]: With dead ends: 400 [2023-02-16 01:30:50,869 INFO L226 Difference]: Without dead ends: 339 [2023-02-16 01:30:50,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2023-02-16 01:30:50,870 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 122 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:50,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 338 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:30:50,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-02-16 01:30:50,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 217. [2023-02-16 01:30:50,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.337962962962963) internal successors, (289), 216 states have internal predecessors, (289), 0 states have call successors, (0), 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 01:30:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 289 transitions. [2023-02-16 01:30:50,972 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 289 transitions. Word has length 26 [2023-02-16 01:30:50,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:50,972 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 289 transitions. [2023-02-16 01:30:50,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 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 01:30:50,972 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 289 transitions. [2023-02-16 01:30:50,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 01:30:50,973 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:50,973 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:50,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:51,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:51,177 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:51,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:51,178 INFO L85 PathProgramCache]: Analyzing trace with hash 452898210, now seen corresponding path program 11 times [2023-02-16 01:30:51,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:51,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653355894] [2023-02-16 01:30:51,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:51,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:51,259 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-16 01:30:51,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:51,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653355894] [2023-02-16 01:30:51,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653355894] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:51,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887715725] [2023-02-16 01:30:51,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:30:51,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:51,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:51,273 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:51,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-16 01:30:51,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-16 01:30:51,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:51,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-16 01:30:51,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-16 01:30:51,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:51,466 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-16 01:30:51,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887715725] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:51,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:51,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 14 [2023-02-16 01:30:51,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635290814] [2023-02-16 01:30:51,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:51,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 01:30:51,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:51,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 01:30:51,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:30:51,467 INFO L87 Difference]: Start difference. First operand 217 states and 289 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:52,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:30:52,202 INFO L93 Difference]: Finished difference Result 415 states and 571 transitions. [2023-02-16 01:30:52,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-16 01:30:52,207 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-16 01:30:52,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:30:52,223 INFO L225 Difference]: With dead ends: 415 [2023-02-16 01:30:52,223 INFO L226 Difference]: Without dead ends: 394 [2023-02-16 01:30:52,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2023-02-16 01:30:52,224 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 65 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:30:52,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 158 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:30:52,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-02-16 01:30:52,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 386. [2023-02-16 01:30:52,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.3896103896103895) internal successors, (535), 385 states have internal predecessors, (535), 0 states have call successors, (0), 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 01:30:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 535 transitions. [2023-02-16 01:30:52,454 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 535 transitions. Word has length 27 [2023-02-16 01:30:52,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:30:52,454 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 535 transitions. [2023-02-16 01:30:52,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:30:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 535 transitions. [2023-02-16 01:30:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-16 01:30:52,464 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:30:52,464 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:30:52,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-16 01:30:52,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:52,669 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:30:52,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:30:52,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1509115665, now seen corresponding path program 12 times [2023-02-16 01:30:52,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:30:52,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143388414] [2023-02-16 01:30:52,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:30:52,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:30:52,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:30:52,900 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:30:52,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:30:52,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143388414] [2023-02-16 01:30:52,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143388414] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:30:52,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681977280] [2023-02-16 01:30:52,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:30:52,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:30:52,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:30:52,901 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:30:52,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-16 01:30:53,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-02-16 01:30:53,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:30:53,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 01:30:53,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:30:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:30:53,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:30:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:30:53,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681977280] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:30:53,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:30:53,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2023-02-16 01:30:53,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319285581] [2023-02-16 01:30:53,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:30:53,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-16 01:30:53,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:30:53,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-16 01:30:53,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2023-02-16 01:30:53,490 INFO L87 Difference]: Start difference. First operand 386 states and 535 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:31:27,121 WARN L233 SmtUtils]: Spent 10.17s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:31:53,571 WARN L233 SmtUtils]: Spent 5.36s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:32:30,159 WARN L233 SmtUtils]: Spent 9.48s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-16 01:33:02,311 WARN L233 SmtUtils]: Spent 5.45s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)