./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/sep.i -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 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 09:23:06,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:23:06,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:23:06,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:23:06,389 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:23:06,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:23:06,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:23:06,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:23:06,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:23:06,404 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:23:06,406 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:23:06,408 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:23:06,408 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:23:06,410 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:23:06,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:23:06,413 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:23:06,413 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:23:06,415 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:23:06,416 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:23:06,421 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:23:06,422 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:23:06,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:23:06,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:23:06,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:23:06,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:23:06,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:23:06,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:23:06,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:23:06,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:23:06,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:23:06,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:23:06,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:23:06,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:23:06,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:23:06,443 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:23:06,443 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:23:06,444 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:23:06,444 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:23:06,445 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:23:06,446 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:23:06,447 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:23:06,447 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:23:06,475 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:23:06,476 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:23:06,476 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:23:06,476 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:23:06,477 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:23:06,477 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:23:06,478 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:23:06,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:23:06,478 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:23:06,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:23:06,479 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:23:06,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:23:06,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:23:06,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:23:06,480 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:23:06,480 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:23:06,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:23:06,481 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:23:06,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:23:06,481 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:23:06,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:23:06,482 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:23:06,482 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:23:06,482 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:23:06,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:23:06,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:23:06,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:23:06,483 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:23:06,483 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:23:06,483 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:23:06,483 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:23:06,484 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:23:06,484 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:23:06,484 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:23:06,484 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:23:06,485 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 54d2da4a9e5a645ffa7361038eff25cc32e29a265e0324de9bda9a6d773becac [2023-02-15 09:23:06,750 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:23:06,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:23:06,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:23:06,774 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:23:06,774 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:23:06,775 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep.i [2023-02-15 09:23:07,935 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:23:08,122 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:23:08,123 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep.i [2023-02-15 09:23:08,129 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17fdd1491/b0a86477f78142b88191dc0de3518ab3/FLAG288e41254 [2023-02-15 09:23:08,146 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17fdd1491/b0a86477f78142b88191dc0de3518ab3 [2023-02-15 09:23:08,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:23:08,149 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:23:08,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:23:08,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:23:08,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:23:08,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4039093a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08, skipping insertion in model container [2023-02-15 09:23:08,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:23:08,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:23:08,299 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/reducercommutativity/sep.i[1298,1311] [2023-02-15 09:23:08,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:23:08,310 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:23:08,330 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/reducercommutativity/sep.i[1298,1311] [2023-02-15 09:23:08,331 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:23:08,343 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:23:08,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08 WrapperNode [2023-02-15 09:23:08,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:23:08,345 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:23:08,345 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:23:08,345 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:23:08,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,420 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2023-02-15 09:23:08,421 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:23:08,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:23:08,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:23:08,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:23:08,430 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,445 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,446 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,448 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:23:08,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:23:08,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:23:08,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:23:08,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08" (1/1) ... [2023-02-15 09:23:08,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:23:08,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:08,482 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 09:23:08,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 09:23:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:23:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:23:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 09:23:08,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:23:08,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:23:08,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:23:08,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:23:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 09:23:08,522 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-02-15 09:23:08,522 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-02-15 09:23:08,617 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:23:08,619 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:23:08,842 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:23:08,847 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:23:08,847 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 09:23:08,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:23:08 BoogieIcfgContainer [2023-02-15 09:23:08,849 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:23:08,850 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:23:08,851 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:23:08,853 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:23:08,853 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:23:08" (1/3) ... [2023-02-15 09:23:08,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bea069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:23:08, skipping insertion in model container [2023-02-15 09:23:08,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:23:08" (2/3) ... [2023-02-15 09:23:08,854 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25bea069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:23:08, skipping insertion in model container [2023-02-15 09:23:08,854 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:23:08" (3/3) ... [2023-02-15 09:23:08,864 INFO L112 eAbstractionObserver]: Analyzing ICFG sep.i [2023-02-15 09:23:08,883 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:23:08,883 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:23:08,937 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:23:08,943 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;@54d01542, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:23:08,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:23:08,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:08,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 09:23:08,956 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:08,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:08,957 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:08,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1158480486, now seen corresponding path program 1 times [2023-02-15 09:23:08,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:08,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198999053] [2023-02-15 09:23:08,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:08,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:09,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:09,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 09:23:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:09,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 09:23:09,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 09:23:09,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:09,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198999053] [2023-02-15 09:23:09,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198999053] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:09,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776985134] [2023-02-15 09:23:09,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:09,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:09,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:09,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:09,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 09:23:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:09,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 09:23:09,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 09:23:09,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:23:09,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776985134] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:23:09,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:23:09,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 5 [2023-02-15 09:23:09,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701257540] [2023-02-15 09:23:09,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:23:09,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 09:23:09,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 09:23:09,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:23:09,466 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:23:09,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:09,486 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2023-02-15 09:23:09,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 09:23:09,488 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-02-15 09:23:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:09,494 INFO L225 Difference]: With dead ends: 50 [2023-02-15 09:23:09,494 INFO L226 Difference]: Without dead ends: 22 [2023-02-15 09:23:09,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:23:09,503 INFO L413 NwaCegarLoop]: 32 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, 32 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 [2023-02-15 09:23:09,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-15 09:23:09,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-15 09:23:09,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:09,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2023-02-15 09:23:09,536 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2023-02-15 09:23:09,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:09,538 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2023-02-15 09:23:09,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:23:09,539 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2023-02-15 09:23:09,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 09:23:09,541 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:09,541 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:09,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 09:23:09,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 09:23:09,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:09,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:09,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1033293076, now seen corresponding path program 1 times [2023-02-15 09:23:09,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:09,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456618803] [2023-02-15 09:23:09,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:09,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:09,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:09,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 09:23:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:09,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 09:23:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 09:23:09,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:09,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456618803] [2023-02-15 09:23:09,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456618803] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:09,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185162468] [2023-02-15 09:23:09,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:09,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:09,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:10,000 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:10,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 09:23:10,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:10,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 09:23:10,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 09:23:10,152 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 09:23:10,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185162468] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:23:10,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 09:23:10,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-02-15 09:23:10,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602927587] [2023-02-15 09:23:10,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:23:10,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 09:23:10,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 09:23:10,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 09:23:10,158 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:23:10,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:10,202 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2023-02-15 09:23:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 09:23:10,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2023-02-15 09:23:10,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:10,204 INFO L225 Difference]: With dead ends: 43 [2023-02-15 09:23:10,204 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 09:23:10,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 09:23:10,206 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:10,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 30 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:10,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 09:23:10,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-02-15 09:23:10,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:10,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-15 09:23:10,216 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2023-02-15 09:23:10,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:10,216 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-15 09:23:10,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:23:10,216 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-15 09:23:10,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 09:23:10,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:10,217 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:10,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:10,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 09:23:10,421 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:10,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash -14370886, now seen corresponding path program 1 times [2023-02-15 09:23:10,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:10,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244730401] [2023-02-15 09:23:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:10,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:10,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:10,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-15 09:23:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:10,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-15 09:23:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 09:23:10,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:10,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244730401] [2023-02-15 09:23:10,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244730401] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:23:10,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:23:10,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 09:23:10,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729934785] [2023-02-15 09:23:10,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:23:10,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 09:23:10,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:10,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 09:23:10,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 09:23:10,602 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:23:10,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:10,643 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2023-02-15 09:23:10,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 09:23:10,644 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2023-02-15 09:23:10,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:10,645 INFO L225 Difference]: With dead ends: 39 [2023-02-15 09:23:10,646 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 09:23:10,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-15 09:23:10,649 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:10,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:10,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 09:23:10,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-15 09:23:10,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:10,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-15 09:23:10,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 37 [2023-02-15 09:23:10,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:10,661 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-15 09:23:10,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 09:23:10,662 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-15 09:23:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 09:23:10,665 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:10,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:10,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 09:23:10,666 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:10,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:10,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1444896732, now seen corresponding path program 1 times [2023-02-15 09:23:10,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:10,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052858484] [2023-02-15 09:23:10,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:10,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:10,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:10,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:10,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-02-15 09:23:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:10,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 09:23:10,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 09:23:10,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:10,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052858484] [2023-02-15 09:23:10,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052858484] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:10,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094705645] [2023-02-15 09:23:10,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:10,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:10,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:10,822 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:10,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 09:23:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:10,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 09:23:10,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 09:23:10,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:11,073 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 09:23:11,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094705645] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:11,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:11,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2023-02-15 09:23:11,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944714524] [2023-02-15 09:23:11,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:11,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 09:23:11,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:11,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 09:23:11,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-15 09:23:11,076 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:11,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:11,146 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2023-02-15 09:23:11,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 09:23:11,147 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-02-15 09:23:11,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:11,149 INFO L225 Difference]: With dead ends: 49 [2023-02-15 09:23:11,149 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 09:23:11,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-02-15 09:23:11,153 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:11,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 65 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:23:11,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 09:23:11,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-02-15 09:23:11,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 09:23:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-02-15 09:23:11,163 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 39 [2023-02-15 09:23:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:11,163 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-02-15 09:23:11,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-02-15 09:23:11,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 09:23:11,164 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:11,165 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:11,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:11,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:11,371 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:11,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:11,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1089239822, now seen corresponding path program 2 times [2023-02-15 09:23:11,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:11,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297456026] [2023-02-15 09:23:11,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:11,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:11,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:12,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:23:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:12,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 09:23:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 09:23:12,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297456026] [2023-02-15 09:23:12,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297456026] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:12,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605739794] [2023-02-15 09:23:12,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:23:12,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:12,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:12,437 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:12,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 09:23:12,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:23:12,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:12,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 09:23:12,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 09:23:12,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 09:23:13,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605739794] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:13,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:13,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2023-02-15 09:23:13,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653835135] [2023-02-15 09:23:13,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:13,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 09:23:13,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:13,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 09:23:13,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 09:23:13,257 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 09:23:13,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:13,424 INFO L93 Difference]: Finished difference Result 73 states and 101 transitions. [2023-02-15 09:23:13,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:23:13,425 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2023-02-15 09:23:13,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:13,429 INFO L225 Difference]: With dead ends: 73 [2023-02-15 09:23:13,429 INFO L226 Difference]: Without dead ends: 69 [2023-02-15 09:23:13,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 86 SyntacticMatches, 15 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-02-15 09:23:13,430 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 31 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:13,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 478 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:23:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-15 09:23:13,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 49. [2023-02-15 09:23:13,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 42 states have internal predecessors, (52), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 09:23:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 66 transitions. [2023-02-15 09:23:13,458 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 66 transitions. Word has length 48 [2023-02-15 09:23:13,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:13,460 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 66 transitions. [2023-02-15 09:23:13,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 14 states have internal predecessors, (37), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 09:23:13,461 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 66 transitions. [2023-02-15 09:23:13,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 09:23:13,467 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:13,467 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:13,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:13,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:13,673 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:13,674 INFO L85 PathProgramCache]: Analyzing trace with hash -409181452, now seen corresponding path program 1 times [2023-02-15 09:23:13,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:13,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356954086] [2023-02-15 09:23:13,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:13,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:13,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:14,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:14,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:23:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:14,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 09:23:14,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:14,987 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 47 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:23:14,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:14,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356954086] [2023-02-15 09:23:14,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356954086] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:14,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420007264] [2023-02-15 09:23:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:14,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:14,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:14,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:14,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 09:23:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:15,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 09:23:15,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:15,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-02-15 09:23:15,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-02-15 09:23:15,767 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 69 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 09:23:15,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:15,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-02-15 09:23:15,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-02-15 09:23:16,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2023-02-15 09:23:16,227 INFO L321 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2023-02-15 09:23:16,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-02-15 09:23:16,471 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 4 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 09:23:16,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420007264] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:16,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:16,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 18] total 46 [2023-02-15 09:23:16,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940755873] [2023-02-15 09:23:16,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:16,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 09:23:16,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:16,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 09:23:16,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=1807, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 09:23:16,474 INFO L87 Difference]: Start difference. First operand 49 states and 66 transitions. Second operand has 46 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 42 states have internal predecessors, (101), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-15 09:23:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:19,931 INFO L93 Difference]: Finished difference Result 309 states and 458 transitions. [2023-02-15 09:23:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-15 09:23:19,932 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 42 states have internal predecessors, (101), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 48 [2023-02-15 09:23:19,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:19,934 INFO L225 Difference]: With dead ends: 309 [2023-02-15 09:23:19,934 INFO L226 Difference]: Without dead ends: 268 [2023-02-15 09:23:19,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3145 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1567, Invalid=9775, Unknown=0, NotChecked=0, Total=11342 [2023-02-15 09:23:19,939 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 354 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:19,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 488 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 09:23:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-02-15 09:23:19,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 187. [2023-02-15 09:23:19,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 162 states have (on average 1.3395061728395061) internal successors, (217), 168 states have internal predecessors, (217), 13 states have call successors, (13), 5 states have call predecessors, (13), 11 states have return successors, (55), 13 states have call predecessors, (55), 13 states have call successors, (55) [2023-02-15 09:23:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 285 transitions. [2023-02-15 09:23:19,994 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 285 transitions. Word has length 48 [2023-02-15 09:23:19,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:19,995 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 285 transitions. [2023-02-15 09:23:19,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 42 states have internal predecessors, (101), 8 states have call successors, (9), 4 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2023-02-15 09:23:19,996 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 285 transitions. [2023-02-15 09:23:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 09:23:19,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:20,000 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:20,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:20,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:20,206 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:20,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1360360308, now seen corresponding path program 2 times [2023-02-15 09:23:20,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:20,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417076974] [2023-02-15 09:23:20,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:20,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:20,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:20,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:23:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:20,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 09:23:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 67 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 09:23:20,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:20,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417076974] [2023-02-15 09:23:20,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417076974] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:20,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665269793] [2023-02-15 09:23:20,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:23:20,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:20,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:20,993 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:21,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 09:23:21,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:23:21,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:21,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 09:23:21,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:21,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:23:21,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 28 [2023-02-15 09:23:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 44 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 09:23:21,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:21,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 23 [2023-02-15 09:23:21,772 INFO L321 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2023-02-15 09:23:21,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2023-02-15 09:23:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 3 proven. 65 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 09:23:21,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665269793] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:21,822 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:21,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 11] total 24 [2023-02-15 09:23:21,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463478295] [2023-02-15 09:23:21,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:21,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 09:23:21,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:21,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 09:23:21,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-02-15 09:23:21,824 INFO L87 Difference]: Start difference. First operand 187 states and 285 transitions. Second operand has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-15 09:23:22,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:22,766 INFO L93 Difference]: Finished difference Result 529 states and 758 transitions. [2023-02-15 09:23:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 09:23:22,766 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) Word has length 48 [2023-02-15 09:23:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:22,769 INFO L225 Difference]: With dead ends: 529 [2023-02-15 09:23:22,769 INFO L226 Difference]: Without dead ends: 355 [2023-02-15 09:23:22,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 89 SyntacticMatches, 7 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=285, Invalid=1607, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 09:23:22,772 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:22,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 298 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 09:23:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-02-15 09:23:22,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 269. [2023-02-15 09:23:22,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 234 states have (on average 1.3376068376068375) internal successors, (313), 246 states have internal predecessors, (313), 14 states have call successors, (14), 8 states have call predecessors, (14), 20 states have return successors, (51), 14 states have call predecessors, (51), 14 states have call successors, (51) [2023-02-15 09:23:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 378 transitions. [2023-02-15 09:23:22,807 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 378 transitions. Word has length 48 [2023-02-15 09:23:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:22,808 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 378 transitions. [2023-02-15 09:23:22,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.142857142857143) internal successors, (66), 21 states have internal predecessors, (66), 5 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 3 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-15 09:23:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 378 transitions. [2023-02-15 09:23:22,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 09:23:22,809 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:22,809 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:22,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:23,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:23,016 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:23,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:23,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1548403594, now seen corresponding path program 3 times [2023-02-15 09:23:23,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:23,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410718530] [2023-02-15 09:23:23,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:23,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:24,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:24,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:23:24,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:24,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 09:23:24,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 61 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-15 09:23:24,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:24,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410718530] [2023-02-15 09:23:24,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410718530] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:24,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593828979] [2023-02-15 09:23:24,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:23:24,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:24,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:24,472 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:24,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 09:23:24,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 09:23:24,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:24,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 09:23:24,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:24,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:23:24,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-02-15 09:23:24,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-02-15 09:23:25,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2023-02-15 09:23:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 2 proven. 71 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 09:23:25,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:25,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593828979] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:25,578 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:23:25,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 37 [2023-02-15 09:23:25,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127453373] [2023-02-15 09:23:25,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:25,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 09:23:25,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:25,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 09:23:25,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 09:23:25,580 INFO L87 Difference]: Start difference. First operand 269 states and 378 transitions. Second operand has 37 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 09:23:31,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:31,680 INFO L93 Difference]: Finished difference Result 755 states and 1018 transitions. [2023-02-15 09:23:31,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2023-02-15 09:23:31,685 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2023-02-15 09:23:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:31,690 INFO L225 Difference]: With dead ends: 755 [2023-02-15 09:23:31,690 INFO L226 Difference]: Without dead ends: 566 [2023-02-15 09:23:31,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10707 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2509, Invalid=24881, Unknown=0, NotChecked=0, Total=27390 [2023-02-15 09:23:31,700 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 310 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 1931 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 2120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 1931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:31,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 771 Invalid, 2120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 1931 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-02-15 09:23:31,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2023-02-15 09:23:31,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 410. [2023-02-15 09:23:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 356 states have (on average 1.2921348314606742) internal successors, (460), 376 states have internal predecessors, (460), 19 states have call successors, (19), 14 states have call predecessors, (19), 34 states have return successors, (78), 19 states have call predecessors, (78), 19 states have call successors, (78) [2023-02-15 09:23:31,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 557 transitions. [2023-02-15 09:23:31,754 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 557 transitions. Word has length 48 [2023-02-15 09:23:31,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:31,754 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 557 transitions. [2023-02-15 09:23:31,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 5 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-15 09:23:31,755 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 557 transitions. [2023-02-15 09:23:31,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 09:23:31,756 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:31,757 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:31,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:31,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:31,963 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:31,963 INFO L85 PathProgramCache]: Analyzing trace with hash -868345224, now seen corresponding path program 4 times [2023-02-15 09:23:31,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:31,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055320935] [2023-02-15 09:23:31,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:31,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:31,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:32,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:32,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:23:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:32,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 09:23:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-02-15 09:23:32,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:32,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055320935] [2023-02-15 09:23:32,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055320935] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:32,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626968719] [2023-02-15 09:23:32,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:23:32,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:32,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:32,508 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:32,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 09:23:32,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:23:32,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:32,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 09:23:32,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 09:23:32,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:33,049 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 09:23:33,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626968719] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:33,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:33,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2023-02-15 09:23:33,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485616118] [2023-02-15 09:23:33,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:33,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 09:23:33,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:33,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 09:23:33,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 09:23:33,052 INFO L87 Difference]: Start difference. First operand 410 states and 557 transitions. Second operand has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 09:23:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:33,274 INFO L93 Difference]: Finished difference Result 680 states and 1015 transitions. [2023-02-15 09:23:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:23:33,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2023-02-15 09:23:33,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:33,279 INFO L225 Difference]: With dead ends: 680 [2023-02-15 09:23:33,279 INFO L226 Difference]: Without dead ends: 676 [2023-02-15 09:23:33,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2023-02-15 09:23:33,281 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 27 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:33,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 582 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:23:33,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2023-02-15 09:23:33,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 542. [2023-02-15 09:23:33,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 474 states have (on average 1.3375527426160339) internal successors, (634), 502 states have internal predecessors, (634), 25 states have call successors, (25), 14 states have call predecessors, (25), 42 states have return successors, (119), 25 states have call predecessors, (119), 25 states have call successors, (119) [2023-02-15 09:23:33,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 778 transitions. [2023-02-15 09:23:33,379 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 778 transitions. Word has length 48 [2023-02-15 09:23:33,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:33,379 INFO L495 AbstractCegarLoop]: Abstraction has 542 states and 778 transitions. [2023-02-15 09:23:33,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 14 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 09:23:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 778 transitions. [2023-02-15 09:23:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 09:23:33,387 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:33,387 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:33,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:33,592 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,SelfDestructingSolverStorable8 [2023-02-15 09:23:33,593 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:33,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:33,593 INFO L85 PathProgramCache]: Analyzing trace with hash -610179786, now seen corresponding path program 5 times [2023-02-15 09:23:33,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:33,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475656771] [2023-02-15 09:23:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:33,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:23:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 09:23:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 09:23:34,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:34,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475656771] [2023-02-15 09:23:34,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475656771] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:34,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925604684] [2023-02-15 09:23:34,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:23:34,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:34,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:34,413 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:34,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 09:23:34,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-15 09:23:34,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:34,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 09:23:34,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:34,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:23:34,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2023-02-15 09:23:34,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:23:34,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:23:34,804 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 09:23:34,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 43 [2023-02-15 09:23:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 51 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 09:23:34,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:35,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 51 [2023-02-15 09:23:35,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 40 [2023-02-15 09:23:35,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:23:35,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 43 [2023-02-15 09:23:35,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-02-15 09:23:35,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:23:35,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 48 [2023-02-15 09:23:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 43 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 09:23:35,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925604684] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:35,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:35,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 14] total 42 [2023-02-15 09:23:35,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462319235] [2023-02-15 09:23:35,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:35,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 09:23:35,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:35,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 09:23:35,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1543, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 09:23:35,568 INFO L87 Difference]: Start difference. First operand 542 states and 778 transitions. Second operand has 42 states, 40 states have (on average 2.5) internal successors, (100), 38 states have internal predecessors, (100), 5 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 09:23:37,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:37,136 INFO L93 Difference]: Finished difference Result 1013 states and 1421 transitions. [2023-02-15 09:23:37,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-15 09:23:37,136 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.5) internal successors, (100), 38 states have internal predecessors, (100), 5 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 48 [2023-02-15 09:23:37,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:37,140 INFO L225 Difference]: With dead ends: 1013 [2023-02-15 09:23:37,140 INFO L226 Difference]: Without dead ends: 808 [2023-02-15 09:23:37,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1565 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=684, Invalid=4572, Unknown=0, NotChecked=0, Total=5256 [2023-02-15 09:23:37,143 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 184 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:37,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 306 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 09:23:37,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2023-02-15 09:23:37,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 670. [2023-02-15 09:23:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 590 states have (on average 1.3491525423728814) internal successors, (796), 625 states have internal predecessors, (796), 33 states have call successors, (33), 17 states have call predecessors, (33), 46 states have return successors, (104), 27 states have call predecessors, (104), 33 states have call successors, (104) [2023-02-15 09:23:37,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 933 transitions. [2023-02-15 09:23:37,238 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 933 transitions. Word has length 48 [2023-02-15 09:23:37,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:37,238 INFO L495 AbstractCegarLoop]: Abstraction has 670 states and 933 transitions. [2023-02-15 09:23:37,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.5) internal successors, (100), 38 states have internal predecessors, (100), 5 states have call successors, (9), 3 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-02-15 09:23:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 933 transitions. [2023-02-15 09:23:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 09:23:37,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:37,242 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:37,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:37,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 09:23:37,447 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:37,448 INFO L85 PathProgramCache]: Analyzing trace with hash -779053714, now seen corresponding path program 6 times [2023-02-15 09:23:37,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:37,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419433132] [2023-02-15 09:23:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:37,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:37,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:37,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:37,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:37,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:23:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:38,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 09:23:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-15 09:23:38,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:38,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419433132] [2023-02-15 09:23:38,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419433132] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:38,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489798777] [2023-02-15 09:23:38,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:23:38,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:38,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:38,241 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:38,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 09:23:38,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-02-15 09:23:38,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:38,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 09:23:38,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:38,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:23:38,426 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2023-02-15 09:23:38,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:23:38,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:23:38,715 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:23:38,717 INFO L321 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2023-02-15 09:23:38,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2023-02-15 09:23:38,799 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:23:38,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:23:38,801 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:23:38,804 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:23:38,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 52 [2023-02-15 09:23:39,038 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 52 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-15 09:23:39,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:39,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489798777] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:39,593 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:23:39,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 33 [2023-02-15 09:23:39,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613094157] [2023-02-15 09:23:39,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:39,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 09:23:39,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:39,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 09:23:39,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 09:23:39,595 INFO L87 Difference]: Start difference. First operand 670 states and 933 transitions. Second operand has 33 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 09:23:42,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:42,448 INFO L93 Difference]: Finished difference Result 1168 states and 1625 transitions. [2023-02-15 09:23:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 09:23:42,449 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2023-02-15 09:23:42,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:42,458 INFO L225 Difference]: With dead ends: 1168 [2023-02-15 09:23:42,459 INFO L226 Difference]: Without dead ends: 1039 [2023-02-15 09:23:42,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2340 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=879, Invalid=6777, Unknown=0, NotChecked=0, Total=7656 [2023-02-15 09:23:42,464 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 186 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:42,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 266 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 09:23:42,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2023-02-15 09:23:42,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 812. [2023-02-15 09:23:42,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 716 states have (on average 1.3435754189944134) internal successors, (962), 760 states have internal predecessors, (962), 39 states have call successors, (39), 21 states have call predecessors, (39), 56 states have return successors, (117), 30 states have call predecessors, (117), 39 states have call successors, (117) [2023-02-15 09:23:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1118 transitions. [2023-02-15 09:23:42,595 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1118 transitions. Word has length 48 [2023-02-15 09:23:42,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:42,597 INFO L495 AbstractCegarLoop]: Abstraction has 812 states and 1118 transitions. [2023-02-15 09:23:42,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.34375) internal successors, (75), 30 states have internal predecessors, (75), 3 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-15 09:23:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1118 transitions. [2023-02-15 09:23:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 09:23:42,599 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:42,599 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:42,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:42,805 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,SelfDestructingSolverStorable10 [2023-02-15 09:23:42,805 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:42,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash -299993678, now seen corresponding path program 1 times [2023-02-15 09:23:42,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:42,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437663381] [2023-02-15 09:23:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:42,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:43,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:43,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:23:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:43,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 09:23:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 09:23:43,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:43,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437663381] [2023-02-15 09:23:43,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437663381] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:43,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494293168] [2023-02-15 09:23:43,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:43,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:43,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:43,305 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:43,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 09:23:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:43,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 09:23:43,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:43,649 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 09:23:43,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 09:23:43,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494293168] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:43,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:43,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2023-02-15 09:23:43,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652400669] [2023-02-15 09:23:43,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:43,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 09:23:43,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:43,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 09:23:43,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-02-15 09:23:43,896 INFO L87 Difference]: Start difference. First operand 812 states and 1118 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 09:23:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:44,169 INFO L93 Difference]: Finished difference Result 1252 states and 1805 transitions. [2023-02-15 09:23:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:23:44,169 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2023-02-15 09:23:44,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:44,175 INFO L225 Difference]: With dead ends: 1252 [2023-02-15 09:23:44,175 INFO L226 Difference]: Without dead ends: 1248 [2023-02-15 09:23:44,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 90 SyntacticMatches, 12 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-02-15 09:23:44,177 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 28 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:44,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 606 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:23:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2023-02-15 09:23:44,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 946. [2023-02-15 09:23:44,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 946 states, 836 states have (on average 1.3648325358851674) internal successors, (1141), 890 states have internal predecessors, (1141), 45 states have call successors, (45), 21 states have call predecessors, (45), 64 states have return successors, (138), 34 states have call predecessors, (138), 45 states have call successors, (138) [2023-02-15 09:23:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 946 states to 946 states and 1324 transitions. [2023-02-15 09:23:44,350 INFO L78 Accepts]: Start accepts. Automaton has 946 states and 1324 transitions. Word has length 48 [2023-02-15 09:23:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:44,350 INFO L495 AbstractCegarLoop]: Abstraction has 946 states and 1324 transitions. [2023-02-15 09:23:44,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 13 states have internal predecessors, (33), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 09:23:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 946 states and 1324 transitions. [2023-02-15 09:23:44,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 09:23:44,354 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:44,354 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:44,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:44,559 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,SelfDestructingSolverStorable11 [2023-02-15 09:23:44,560 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:44,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:44,560 INFO L85 PathProgramCache]: Analyzing trace with hash 485005286, now seen corresponding path program 3 times [2023-02-15 09:23:44,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:44,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615959851] [2023-02-15 09:23:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:44,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:44,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:44,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:23:44,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:44,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-15 09:23:44,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:44,686 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 32 proven. 59 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 09:23:44,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:44,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615959851] [2023-02-15 09:23:44,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615959851] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:44,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128927522] [2023-02-15 09:23:44,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:23:44,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:44,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:44,689 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:44,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 09:23:44,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 09:23:44,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:44,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 09:23:44,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:44,836 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 09:23:44,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 66 proven. 1 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 09:23:44,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128927522] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:44,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:44,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 18 [2023-02-15 09:23:44,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17509940] [2023-02-15 09:23:44,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:44,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 09:23:44,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:44,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 09:23:44,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-02-15 09:23:44,953 INFO L87 Difference]: Start difference. First operand 946 states and 1324 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:45,320 INFO L93 Difference]: Finished difference Result 1281 states and 1770 transitions. [2023-02-15 09:23:45,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 09:23:45,321 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 51 [2023-02-15 09:23:45,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:45,324 INFO L225 Difference]: With dead ends: 1281 [2023-02-15 09:23:45,324 INFO L226 Difference]: Without dead ends: 616 [2023-02-15 09:23:45,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 103 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2023-02-15 09:23:45,326 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 56 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:45,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 358 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:23:45,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2023-02-15 09:23:45,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 556. [2023-02-15 09:23:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 498 states have (on average 1.3313253012048192) internal successors, (663), 523 states have internal predecessors, (663), 25 states have call successors, (25), 12 states have call predecessors, (25), 32 states have return successors, (70), 20 states have call predecessors, (70), 25 states have call successors, (70) [2023-02-15 09:23:45,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 758 transitions. [2023-02-15 09:23:45,423 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 758 transitions. Word has length 51 [2023-02-15 09:23:45,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:45,423 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 758 transitions. [2023-02-15 09:23:45,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 09:23:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 758 transitions. [2023-02-15 09:23:45,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 09:23:45,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:45,425 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:45,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:45,631 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,SelfDestructingSolverStorable12 [2023-02-15 09:23:45,631 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:45,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:45,632 INFO L85 PathProgramCache]: Analyzing trace with hash 287990514, now seen corresponding path program 7 times [2023-02-15 09:23:45,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:45,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841920317] [2023-02-15 09:23:45,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:45,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:45,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:45,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 09:23:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:45,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-15 09:23:45,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 48 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-15 09:23:45,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:45,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841920317] [2023-02-15 09:23:45,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841920317] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:45,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245550306] [2023-02-15 09:23:45,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 09:23:45,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:45,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:45,781 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:45,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 09:23:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:45,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 09:23:45,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:45,908 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 50 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 09:23:45,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:45,973 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-02-15 09:23:45,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245550306] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:45,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:45,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2023-02-15 09:23:45,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476062021] [2023-02-15 09:23:45,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:45,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 09:23:45,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:45,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 09:23:45,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-02-15 09:23:45,975 INFO L87 Difference]: Start difference. First operand 556 states and 758 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 09:23:46,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:46,136 INFO L93 Difference]: Finished difference Result 616 states and 839 transitions. [2023-02-15 09:23:46,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:23:46,137 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 52 [2023-02-15 09:23:46,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:46,140 INFO L225 Difference]: With dead ends: 616 [2023-02-15 09:23:46,140 INFO L226 Difference]: Without dead ends: 575 [2023-02-15 09:23:46,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-02-15 09:23:46,141 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:46,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 145 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:23:46,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2023-02-15 09:23:46,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 519. [2023-02-15 09:23:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 466 states have (on average 1.349785407725322) internal successors, (629), 490 states have internal predecessors, (629), 23 states have call successors, (23), 10 states have call predecessors, (23), 29 states have return successors, (67), 18 states have call predecessors, (67), 23 states have call successors, (67) [2023-02-15 09:23:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 719 transitions. [2023-02-15 09:23:46,237 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 719 transitions. Word has length 52 [2023-02-15 09:23:46,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:46,237 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 719 transitions. [2023-02-15 09:23:46,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-15 09:23:46,237 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 719 transitions. [2023-02-15 09:23:46,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 09:23:46,239 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:46,239 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:46,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:46,445 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,SelfDestructingSolverStorable13 [2023-02-15 09:23:46,446 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:46,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:46,446 INFO L85 PathProgramCache]: Analyzing trace with hash 820316862, now seen corresponding path program 4 times [2023-02-15 09:23:46,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:46,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295445298] [2023-02-15 09:23:46,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:46,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:46,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:46,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:46,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 09:23:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:46,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-15 09:23:46,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-15 09:23:47,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:47,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295445298] [2023-02-15 09:23:47,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295445298] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:47,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014371972] [2023-02-15 09:23:47,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:23:47,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:47,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:47,113 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:47,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 09:23:47,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:23:47,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:47,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-15 09:23:47,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-15 09:23:47,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-02-15 09:23:47,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014371972] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:47,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:47,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 19 [2023-02-15 09:23:47,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787609580] [2023-02-15 09:23:47,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:47,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 09:23:47,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:47,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 09:23:47,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2023-02-15 09:23:47,822 INFO L87 Difference]: Start difference. First operand 519 states and 719 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 09:23:48,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:48,061 INFO L93 Difference]: Finished difference Result 796 states and 1212 transitions. [2023-02-15 09:23:48,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 09:23:48,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 59 [2023-02-15 09:23:48,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:48,066 INFO L225 Difference]: With dead ends: 796 [2023-02-15 09:23:48,066 INFO L226 Difference]: Without dead ends: 792 [2023-02-15 09:23:48,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 109 SyntacticMatches, 16 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-02-15 09:23:48,068 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 34 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:48,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 588 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:23:48,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2023-02-15 09:23:48,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 599. [2023-02-15 09:23:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 539 states have (on average 1.3673469387755102) internal successors, (737), 567 states have internal predecessors, (737), 26 states have call successors, (26), 10 states have call predecessors, (26), 33 states have return successors, (96), 21 states have call predecessors, (96), 26 states have call successors, (96) [2023-02-15 09:23:48,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 859 transitions. [2023-02-15 09:23:48,191 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 859 transitions. Word has length 59 [2023-02-15 09:23:48,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:48,191 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 859 transitions. [2023-02-15 09:23:48,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 15 states have internal predecessors, (39), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-15 09:23:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 859 transitions. [2023-02-15 09:23:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 09:23:48,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:48,198 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:48,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:48,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:48,404 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:48,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1500375232, now seen corresponding path program 8 times [2023-02-15 09:23:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:48,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591004959] [2023-02-15 09:23:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:48,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:48,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:48,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 09:23:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:49,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-15 09:23:49,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 10 proven. 135 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-15 09:23:49,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:49,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591004959] [2023-02-15 09:23:49,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591004959] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:49,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571881802] [2023-02-15 09:23:49,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:23:49,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:49,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:49,268 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:49,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 09:23:49,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:23:49,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:49,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 09:23:49,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:49,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-02-15 09:23:49,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2023-02-15 09:23:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 14 proven. 129 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 09:23:49,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:50,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-02-15 09:23:50,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2023-02-15 09:23:50,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2023-02-15 09:23:50,318 INFO L321 Elim1Store]: treesize reduction 4, result has 73.3 percent of original size [2023-02-15 09:23:50,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2023-02-15 09:23:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 7 proven. 133 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-15 09:23:50,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571881802] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:23:50,468 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:23:50,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 19] total 45 [2023-02-15 09:23:50,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639221826] [2023-02-15 09:23:50,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:50,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 09:23:50,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:50,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 09:23:50,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1775, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 09:23:50,470 INFO L87 Difference]: Start difference. First operand 599 states and 859 transitions. Second operand has 45 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 42 states have internal predecessors, (105), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 09:23:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:23:53,372 INFO L93 Difference]: Finished difference Result 2099 states and 3132 transitions. [2023-02-15 09:23:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-15 09:23:53,373 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 42 states have internal predecessors, (105), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) Word has length 59 [2023-02-15 09:23:53,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:23:53,381 INFO L225 Difference]: With dead ends: 2099 [2023-02-15 09:23:53,382 INFO L226 Difference]: Without dead ends: 1955 [2023-02-15 09:23:53,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 92 SyntacticMatches, 8 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1431, Invalid=9911, Unknown=0, NotChecked=0, Total=11342 [2023-02-15 09:23:53,385 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 200 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-15 09:23:53,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 540 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-15 09:23:53,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1955 states. [2023-02-15 09:23:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1955 to 1111. [2023-02-15 09:23:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1011 states have (on average 1.3818001978239367) internal successors, (1397), 1058 states have internal predecessors, (1397), 39 states have call successors, (39), 20 states have call predecessors, (39), 60 states have return successors, (169), 32 states have call predecessors, (169), 39 states have call successors, (169) [2023-02-15 09:23:53,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1605 transitions. [2023-02-15 09:23:53,603 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1605 transitions. Word has length 59 [2023-02-15 09:23:53,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:23:53,603 INFO L495 AbstractCegarLoop]: Abstraction has 1111 states and 1605 transitions. [2023-02-15 09:23:53,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 41 states have (on average 2.5609756097560976) internal successors, (105), 42 states have internal predecessors, (105), 7 states have call successors, (8), 3 states have call predecessors, (8), 6 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 09:23:53,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1605 transitions. [2023-02-15 09:23:53,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 09:23:53,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:23:53,610 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:23:53,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 09:23:53,816 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,SelfDestructingSolverStorable15 [2023-02-15 09:23:53,816 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:23:53,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:23:53,817 INFO L85 PathProgramCache]: Analyzing trace with hash 1078482300, now seen corresponding path program 9 times [2023-02-15 09:23:53,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:23:53,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209274966] [2023-02-15 09:23:53,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:23:53,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:23:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:54,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:23:54,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:54,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 09:23:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:54,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-15 09:23:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:23:55,188 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 43 proven. 96 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 09:23:55,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:23:55,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209274966] [2023-02-15 09:23:55,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209274966] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:55,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183853863] [2023-02-15 09:23:55,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:23:55,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:23:55,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:23:55,194 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:23:55,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 09:23:55,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-15 09:23:55,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:23:55,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 09:23:55,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:23:55,612 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2023-02-15 09:23:55,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 36 [2023-02-15 09:23:55,817 INFO L321 Elim1Store]: treesize reduction 43, result has 20.4 percent of original size [2023-02-15 09:23:55,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 57 [2023-02-15 09:23:56,029 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:23:56,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 09:23:56,030 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-15 09:23:56,033 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:23:56,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 53 [2023-02-15 09:23:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 86 proven. 49 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 09:23:56,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:23:56,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183853863] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:23:56,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 09:23:56,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 42 [2023-02-15 09:23:56,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467917109] [2023-02-15 09:23:56,605 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 09:23:56,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 09:23:56,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:23:56,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 09:23:56,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1654, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 09:23:56,606 INFO L87 Difference]: Start difference. First operand 1111 states and 1605 transitions. Second operand has 42 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 09:24:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:24:03,357 INFO L93 Difference]: Finished difference Result 3391 states and 5059 transitions. [2023-02-15 09:24:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-02-15 09:24:03,358 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 59 [2023-02-15 09:24:03,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:24:03,370 INFO L225 Difference]: With dead ends: 3391 [2023-02-15 09:24:03,371 INFO L226 Difference]: Without dead ends: 2938 [2023-02-15 09:24:03,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7188 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1661, Invalid=18079, Unknown=0, NotChecked=0, Total=19740 [2023-02-15 09:24:03,376 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 216 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-15 09:24:03,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 431 Invalid, 2442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-15 09:24:03,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2938 states. [2023-02-15 09:24:03,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2938 to 1964. [2023-02-15 09:24:03,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1964 states, 1785 states have (on average 1.3630252100840337) internal successors, (2433), 1864 states have internal predecessors, (2433), 61 states have call successors, (61), 36 states have call predecessors, (61), 117 states have return successors, (362), 63 states have call predecessors, (362), 61 states have call successors, (362) [2023-02-15 09:24:03,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1964 states to 1964 states and 2856 transitions. [2023-02-15 09:24:03,908 INFO L78 Accepts]: Start accepts. Automaton has 1964 states and 2856 transitions. Word has length 59 [2023-02-15 09:24:03,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:24:03,908 INFO L495 AbstractCegarLoop]: Abstraction has 1964 states and 2856 transitions. [2023-02-15 09:24:03,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 4 states have call successors, (5), 2 states have call predecessors, (5), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 09:24:03,909 INFO L276 IsEmpty]: Start isEmpty. Operand 1964 states and 2856 transitions. [2023-02-15 09:24:03,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 09:24:03,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:24:03,915 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:24:03,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 09:24:04,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 09:24:04,122 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:24:04,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:24:04,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1521916736, now seen corresponding path program 10 times [2023-02-15 09:24:04,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:24:04,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564284924] [2023-02-15 09:24:04,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:24:04,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:24:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:24:04,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 09:24:04,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:24:04,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 09:24:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:24:04,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-15 09:24:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:24:04,827 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 12 proven. 123 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-15 09:24:04,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:24:04,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564284924] [2023-02-15 09:24:04,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564284924] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:24:04,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751661662] [2023-02-15 09:24:04,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:24:04,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:24:04,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:24:04,833 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:24:04,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 09:24:04,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:24:04,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:24:04,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-15 09:24:04,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:24:05,210 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-02-15 09:24:05,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 33 [2023-02-15 09:24:05,289 INFO L321 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2023-02-15 09:24:05,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 46 [2023-02-15 09:24:05,440 INFO L321 Elim1Store]: treesize reduction 125, result has 10.7 percent of original size [2023-02-15 09:24:05,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 39 [2023-02-15 09:24:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 24 proven. 129 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 09:24:11,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:24:30,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 75 [2023-02-15 09:24:30,863 INFO L321 Elim1Store]: treesize reduction 5, result has 76.2 percent of original size [2023-02-15 09:24:30,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 483 treesize of output 450 [2023-02-15 09:24:31,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:24:31,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 66 [2023-02-15 09:24:31,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 5 [2023-02-15 09:24:31,331 INFO L321 Elim1Store]: treesize reduction 10, result has 76.2 percent of original size [2023-02-15 09:24:31,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 470 treesize of output 459 [2023-02-15 09:24:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 8 proven. 141 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-15 09:24:32,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751661662] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:24:32,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:24:32,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26, 24] total 58 [2023-02-15 09:24:32,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929291102] [2023-02-15 09:24:32,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:24:32,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-15 09:24:32,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:24:32,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-15 09:24:32,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=3021, Unknown=11, NotChecked=0, Total=3306 [2023-02-15 09:24:32,751 INFO L87 Difference]: Start difference. First operand 1964 states and 2856 transitions. Second operand has 58 states, 55 states have (on average 2.3454545454545452) internal successors, (129), 57 states have internal predecessors, (129), 7 states have call successors, (8), 3 states have call predecessors, (8), 8 states have return successors, (8), 5 states have call predecessors, (8), 7 states have call successors, (8) [2023-02-15 09:25:58,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 09:26:01,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 09:26:03,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:26:14,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:26:21,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 09:26:23,655 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 09:26:31,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:26:33,398 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-02-15 09:27:00,334 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 09:27:02,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 09:27:04,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-02-15 09:27:10,498 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]