./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/avg10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/avg10-2.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 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-15 23:40:05,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 23:40:05,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 23:40:05,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 23:40:05,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 23:40:05,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 23:40:05,534 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 23:40:05,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 23:40:05,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 23:40:05,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 23:40:05,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 23:40:05,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 23:40:05,537 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 23:40:05,538 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 23:40:05,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 23:40:05,539 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 23:40:05,540 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 23:40:05,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 23:40:05,544 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 23:40:05,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 23:40:05,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 23:40:05,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 23:40:05,548 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 23:40:05,549 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 23:40:05,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 23:40:05,555 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 23:40:05,556 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 23:40:05,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 23:40:05,557 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 23:40:05,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 23:40:05,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 23:40:05,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 23:40:05,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 23:40:05,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 23:40:05,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 23:40:05,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 23:40:05,561 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 23:40:05,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 23:40:05,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 23:40:05,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 23:40:05,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 23:40:05,565 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 23:40:05,582 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 23:40:05,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 23:40:05,582 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 23:40:05,583 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 23:40:05,583 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 23:40:05,583 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 23:40:05,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 23:40:05,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 23:40:05,584 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 23:40:05,584 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 23:40:05,585 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 23:40:05,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 23:40:05,585 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 23:40:05,585 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 23:40:05,586 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 23:40:05,586 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 23:40:05,586 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 23:40:05,586 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 23:40:05,586 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 23:40:05,586 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 23:40:05,586 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 23:40:05,587 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 23:40:05,587 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 23:40:05,587 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 23:40:05,587 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:40:05,587 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 23:40:05,588 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 23:40:05,588 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 23:40:05,588 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 23:40:05,588 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 23:40:05,588 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 23:40:05,588 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 23:40:05,589 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 23:40:05,589 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 23:40:05,589 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 23:40:05,589 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 431bc26901e3cf271c74e4f10a5bc241d4509dbbafd99aaf0126c46ffc8b7c33 [2023-02-15 23:40:05,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 23:40:05,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 23:40:05,795 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 23:40:05,796 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 23:40:05,796 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 23:40:05,797 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/avg10-2.i [2023-02-15 23:40:06,799 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 23:40:06,951 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 23:40:06,952 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/avg10-2.i [2023-02-15 23:40:06,956 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c31cd0599/cf3549b17b824f62b35f20206e8d45e0/FLAG8acdac2ed [2023-02-15 23:40:06,964 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c31cd0599/cf3549b17b824f62b35f20206e8d45e0 [2023-02-15 23:40:06,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 23:40:06,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 23:40:06,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 23:40:06,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 23:40:06,970 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 23:40:06,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:40:06" (1/1) ... [2023-02-15 23:40:06,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d083031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:06, skipping insertion in model container [2023-02-15 23:40:06,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:40:06" (1/1) ... [2023-02-15 23:40:06,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 23:40:06,985 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 23:40:07,096 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/avg10-2.i[1282,1295] [2023-02-15 23:40:07,102 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:40:07,108 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 23:40:07,120 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/avg10-2.i[1282,1295] [2023-02-15 23:40:07,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 23:40:07,129 INFO L208 MainTranslator]: Completed translation [2023-02-15 23:40:07,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07 WrapperNode [2023-02-15 23:40:07,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 23:40:07,131 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 23:40:07,131 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 23:40:07,131 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 23:40:07,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07" (1/1) ... [2023-02-15 23:40:07,140 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07" (1/1) ... [2023-02-15 23:40:07,151 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-15 23:40:07,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 23:40:07,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 23:40:07,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 23:40:07,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 23:40:07,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07" (1/1) ... [2023-02-15 23:40:07,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07" (1/1) ... [2023-02-15 23:40:07,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07" (1/1) ... [2023-02-15 23:40:07,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07" (1/1) ... [2023-02-15 23:40:07,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07" (1/1) ... [2023-02-15 23:40:07,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07" (1/1) ... [2023-02-15 23:40:07,166 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07" (1/1) ... [2023-02-15 23:40:07,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07" (1/1) ... [2023-02-15 23:40:07,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 23:40:07,168 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 23:40:07,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 23:40:07,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 23:40:07,169 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07" (1/1) ... [2023-02-15 23:40:07,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 23:40:07,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:40:07,189 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 23:40:07,200 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 23:40:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 23:40:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 23:40:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 23:40:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 23:40:07,227 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2023-02-15 23:40:07,228 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2023-02-15 23:40:07,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 23:40:07,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 23:40:07,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 23:40:07,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 23:40:07,273 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 23:40:07,274 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 23:40:07,436 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 23:40:07,439 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 23:40:07,440 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-15 23:40:07,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:40:07 BoogieIcfgContainer [2023-02-15 23:40:07,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 23:40:07,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 23:40:07,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 23:40:07,448 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 23:40:07,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:40:06" (1/3) ... [2023-02-15 23:40:07,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f017a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:40:07, skipping insertion in model container [2023-02-15 23:40:07,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:40:07" (2/3) ... [2023-02-15 23:40:07,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f017a8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:40:07, skipping insertion in model container [2023-02-15 23:40:07,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:40:07" (3/3) ... [2023-02-15 23:40:07,453 INFO L112 eAbstractionObserver]: Analyzing ICFG avg10-2.i [2023-02-15 23:40:07,465 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 23:40:07,465 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 23:40:07,496 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 23:40:07,501 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;@48c2e9e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 23:40:07,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 23:40:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 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 23:40:07,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 23:40:07,510 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:40:07,510 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 23:40:07,511 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:40:07,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:40:07,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2023-02-15 23:40:07,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:40:07,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739457545] [2023-02-15 23:40:07,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:07,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:40:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:07,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 23:40:07,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:07,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-15 23:40:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:07,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-15 23:40:07,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:07,797 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 23:40:07,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:40:07,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739457545] [2023-02-15 23:40:07,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739457545] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:40:07,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683757698] [2023-02-15 23:40:07,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:07,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:07,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:40:07,801 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 23:40:07,802 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 23:40:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:07,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 23:40:07,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:40:07,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 23:40:07,922 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 23:40:07,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683757698] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:40:07,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 23:40:07,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-15 23:40:07,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478157993] [2023-02-15 23:40:07,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:40:07,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 23:40:07,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:40:07,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 23:40:07,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 23:40:07,962 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 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 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 23:40:07,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:40:07,983 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2023-02-15 23:40:07,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 23:40:07,984 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-15 23:40:07,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:40:07,988 INFO L225 Difference]: With dead ends: 50 [2023-02-15 23:40:07,988 INFO L226 Difference]: Without dead ends: 24 [2023-02-15 23:40:07,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 23:40:07,992 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:40:07,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:40:08,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-15 23:40:08,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-02-15 23:40:08,015 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 23:40:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-02-15 23:40:08,017 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2023-02-15 23:40:08,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:40:08,017 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-02-15 23:40:08,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-15 23:40:08,018 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-02-15 23:40:08,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-15 23:40:08,019 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:40:08,019 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, 1, 1] [2023-02-15 23:40:08,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 23:40:08,224 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 23:40:08,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:40:08,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:40:08,227 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2023-02-15 23:40:08,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:40:08,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043922119] [2023-02-15 23:40:08,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:08,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:40:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:08,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:40:08,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:08,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-15 23:40:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:08,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-15 23:40:08,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:08,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 23:40:08,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:40:08,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043922119] [2023-02-15 23:40:08,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043922119] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:40:08,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69727736] [2023-02-15 23:40:08,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:08,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:08,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:40:08,393 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 23:40:08,396 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 23:40:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:08,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 23:40:08,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:40:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 23:40:08,479 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 23:40:08,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69727736] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:40:08,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 23:40:08,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-15 23:40:08,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066972941] [2023-02-15 23:40:08,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:40:08,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 23:40:08,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:40:08,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 23:40:08,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 23:40:08,481 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 23:40:08,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:40:08,489 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-02-15 23:40:08,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 23:40:08,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 30 [2023-02-15 23:40:08,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:40:08,490 INFO L225 Difference]: With dead ends: 42 [2023-02-15 23:40:08,490 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 23:40:08,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-15 23:40:08,491 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:40:08,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:40:08,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 23:40:08,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-15 23:40:08,494 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 23:40:08,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-15 23:40:08,495 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2023-02-15 23:40:08,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:40:08,495 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-15 23:40:08,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 23:40:08,496 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-15 23:40:08,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 23:40:08,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:40:08,497 INFO L195 NwaCegarLoop]: trace histogram [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 23:40:08,503 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 23:40:08,701 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 23:40:08,701 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:40:08,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:40:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2023-02-15 23:40:08,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:40:08,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582857369] [2023-02-15 23:40:08,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:40:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:08,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:40:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:08,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-15 23:40:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:08,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-15 23:40:08,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:08,834 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-15 23:40:08,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:40:08,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582857369] [2023-02-15 23:40:08,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582857369] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:40:08,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725468364] [2023-02-15 23:40:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:08,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:08,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:40:08,837 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 23:40:08,839 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 23:40:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:08,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-15 23:40:08,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:40:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-15 23:40:08,935 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 23:40:08,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725468364] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 23:40:08,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 23:40:08,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-02-15 23:40:08,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044416999] [2023-02-15 23:40:08,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 23:40:08,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 23:40:08,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:40:08,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 23:40:08,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 23:40:08,936 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 23:40:08,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:40:08,944 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-02-15 23:40:08,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 23:40:08,944 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 36 [2023-02-15 23:40:08,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:40:08,945 INFO L225 Difference]: With dead ends: 39 [2023-02-15 23:40:08,945 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 23:40:08,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 23:40:08,946 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:40:08,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:40:08,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 23:40:08,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2023-02-15 23:40:08,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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 23:40:08,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-15 23:40:08,950 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2023-02-15 23:40:08,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:40:08,951 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-15 23:40:08,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 23:40:08,951 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-15 23:40:08,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-15 23:40:08,951 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:40:08,952 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:40:08,963 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 23:40:09,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:09,157 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:40:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:40:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2023-02-15 23:40:09,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:40:09,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378172713] [2023-02-15 23:40:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:09,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:40:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:09,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-15 23:40:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:09,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-02-15 23:40:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:09,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-15 23:40:09,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-15 23:40:09,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:40:09,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378172713] [2023-02-15 23:40:09,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378172713] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:40:09,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448266003] [2023-02-15 23:40:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:09,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:09,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:40:09,263 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 23:40:09,265 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 23:40:09,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:09,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 23:40:09,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:40:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 23:40:09,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:40:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-15 23:40:09,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448266003] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:40:09,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:40:09,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-15 23:40:09,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973703238] [2023-02-15 23:40:09,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:40:09,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 23:40:09,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:40:09,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 23:40:09,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 23:40:09,374 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 23:40:09,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:40:09,416 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-02-15 23:40:09,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 23:40:09,416 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2023-02-15 23:40:09,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:40:09,418 INFO L225 Difference]: With dead ends: 54 [2023-02-15 23:40:09,418 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 23:40:09,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 23:40:09,423 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:40:09,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 102 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:40:09,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 23:40:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2023-02-15 23:40:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 23:40:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-02-15 23:40:09,432 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2023-02-15 23:40:09,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:40:09,432 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-02-15 23:40:09,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 23:40:09,432 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-02-15 23:40:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-15 23:40:09,434 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:40:09,434 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 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 23:40:09,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 23:40:09,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:09,639 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:40:09,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:40:09,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2023-02-15 23:40:09,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:40:09,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823314008] [2023-02-15 23:40:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:09,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:40:09,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:09,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-15 23:40:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:09,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-15 23:40:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:09,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2023-02-15 23:40:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-15 23:40:09,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:40:09,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823314008] [2023-02-15 23:40:09,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823314008] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:40:09,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831837156] [2023-02-15 23:40:09,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 23:40:09,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:09,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:40:09,731 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 23:40:09,733 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 23:40:09,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 23:40:09,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:40:09,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 23:40:09,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:40:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 23:40:09,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:40:09,884 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 23:40:09,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831837156] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:40:09,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:40:09,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-15 23:40:09,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408168471] [2023-02-15 23:40:09,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:40:09,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 23:40:09,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:40:09,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 23:40:09,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 23:40:09,886 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 23:40:09,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:40:09,921 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2023-02-15 23:40:09,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 23:40:09,922 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2023-02-15 23:40:09,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:40:09,922 INFO L225 Difference]: With dead ends: 70 [2023-02-15 23:40:09,922 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 23:40:09,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-15 23:40:09,923 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:40:09,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:40:09,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 23:40:09,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-15 23:40:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 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 23:40:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-02-15 23:40:09,928 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2023-02-15 23:40:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:40:09,928 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-02-15 23:40:09,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 23:40:09,928 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-02-15 23:40:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 23:40:09,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:40:09,929 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 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 23:40:09,937 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 23:40:10,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:10,138 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:40:10,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:40:10,138 INFO L85 PathProgramCache]: Analyzing trace with hash 936210247, now seen corresponding path program 3 times [2023-02-15 23:40:10,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:40:10,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240710050] [2023-02-15 23:40:10,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:10,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:40:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:10,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 23:40:10,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:10,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-15 23:40:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:10,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-15 23:40:10,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-02-15 23:40:10,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:40:10,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240710050] [2023-02-15 23:40:10,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240710050] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:40:10,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415518313] [2023-02-15 23:40:10,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 23:40:10,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:10,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:40:10,253 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 23:40:10,255 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 23:40:10,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 23:40:10,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:40:10,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 23:40:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:40:10,335 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-02-15 23:40:10,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:40:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2023-02-15 23:40:10,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415518313] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:40:10,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:40:10,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-15 23:40:10,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739649656] [2023-02-15 23:40:10,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:40:10,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 23:40:10,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:40:10,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 23:40:10,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-15 23:40:10,380 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 23:40:10,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:40:10,401 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2023-02-15 23:40:10,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 23:40:10,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2023-02-15 23:40:10,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:40:10,403 INFO L225 Difference]: With dead ends: 78 [2023-02-15 23:40:10,404 INFO L226 Difference]: Without dead ends: 55 [2023-02-15 23:40:10,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-15 23:40:10,405 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:40:10,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:40:10,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-15 23:40:10,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-02-15 23:40:10,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 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 23:40:10,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-02-15 23:40:10,411 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 64 [2023-02-15 23:40:10,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:40:10,411 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-02-15 23:40:10,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 23:40:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-02-15 23:40:10,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-02-15 23:40:10,412 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:40:10,412 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 10, 10, 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 23:40:10,419 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 23:40:10,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:10,617 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:40:10,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:40:10,618 INFO L85 PathProgramCache]: Analyzing trace with hash 571451455, now seen corresponding path program 4 times [2023-02-15 23:40:10,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:40:10,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219421273] [2023-02-15 23:40:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:10,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:40:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:10,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 23:40:10,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:10,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 23:40:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:10,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2023-02-15 23:40:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2023-02-15 23:40:10,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:40:10,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219421273] [2023-02-15 23:40:10,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219421273] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:40:10,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092417474] [2023-02-15 23:40:10,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 23:40:10,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:10,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:40:10,763 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 23:40:10,765 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 23:40:10,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 23:40:10,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:40:10,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 23:40:10,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:40:10,847 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2023-02-15 23:40:10,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:40:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2023-02-15 23:40:10,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092417474] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:40:10,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:40:10,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2023-02-15 23:40:10,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435165316] [2023-02-15 23:40:10,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:40:10,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 23:40:10,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:40:10,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 23:40:10,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-02-15 23:40:10,906 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 23:40:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:40:10,927 INFO L93 Difference]: Finished difference Result 94 states and 107 transitions. [2023-02-15 23:40:10,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 23:40:10,928 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 88 [2023-02-15 23:40:10,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:40:10,928 INFO L225 Difference]: With dead ends: 94 [2023-02-15 23:40:10,929 INFO L226 Difference]: Without dead ends: 63 [2023-02-15 23:40:10,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 175 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-02-15 23:40:10,929 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:40:10,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 90 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:40:10,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-15 23:40:10,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2023-02-15 23:40:10,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 58 states have internal predecessors, (61), 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 23:40:10,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2023-02-15 23:40:10,934 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 88 [2023-02-15 23:40:10,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:40:10,934 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2023-02-15 23:40:10,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 23:40:10,934 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2023-02-15 23:40:10,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-15 23:40:10,935 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:40:10,935 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 10, 10, 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 23:40:10,940 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 23:40:11,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:11,140 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:40:11,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:40:11,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2026866377, now seen corresponding path program 5 times [2023-02-15 23:40:11,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:40:11,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674558989] [2023-02-15 23:40:11,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:11,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:40:11,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:11,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 23:40:11,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:11,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-15 23:40:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:11,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-02-15 23:40:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2023-02-15 23:40:11,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:40:11,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674558989] [2023-02-15 23:40:11,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674558989] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:40:11,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911034625] [2023-02-15 23:40:11,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 23:40:11,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:11,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:40:11,232 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 23:40:11,234 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 23:40:11,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-02-15 23:40:11,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:40:11,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 23:40:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:40:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 450 proven. 4 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2023-02-15 23:40:11,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:40:11,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1079 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2023-02-15 23:40:11,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911034625] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:40:11,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:40:11,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-15 23:40:11,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655104959] [2023-02-15 23:40:11,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:40:11,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 23:40:11,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:40:11,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 23:40:11,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-15 23:40:11,621 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:40:11,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:40:11,637 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2023-02-15 23:40:11,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 23:40:11,637 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 112 [2023-02-15 23:40:11,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:40:11,638 INFO L225 Difference]: With dead ends: 102 [2023-02-15 23:40:11,638 INFO L226 Difference]: Without dead ends: 71 [2023-02-15 23:40:11,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-15 23:40:11,639 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:40:11,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:40:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-15 23:40:11,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2023-02-15 23:40:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 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 23:40:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2023-02-15 23:40:11,647 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 112 [2023-02-15 23:40:11,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:40:11,647 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2023-02-15 23:40:11,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:40:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2023-02-15 23:40:11,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-15 23:40:11,652 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:40:11,653 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:40:11,660 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 23:40:11,860 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,SelfDestructingSolverStorable7 [2023-02-15 23:40:11,860 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:40:11,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:40:11,861 INFO L85 PathProgramCache]: Analyzing trace with hash 2045037743, now seen corresponding path program 6 times [2023-02-15 23:40:11,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:40:11,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287224744] [2023-02-15 23:40:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:11,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:40:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:11,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 23:40:11,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:11,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-15 23:40:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:11,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2023-02-15 23:40:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2023-02-15 23:40:12,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:40:12,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287224744] [2023-02-15 23:40:12,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287224744] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:40:12,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147486750] [2023-02-15 23:40:12,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 23:40:12,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:12,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:40:12,006 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 23:40:12,008 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 23:40:12,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2023-02-15 23:40:12,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 23:40:12,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 23:40:12,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:40:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 450 proven. 36 refuted. 0 times theorem prover too weak. 625 trivial. 0 not checked. [2023-02-15 23:40:12,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 23:40:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1111 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1075 trivial. 0 not checked. [2023-02-15 23:40:12,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147486750] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 23:40:12,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 23:40:12,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2023-02-15 23:40:12,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218144197] [2023-02-15 23:40:12,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 23:40:12,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 23:40:12,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 23:40:12,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 23:40:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-02-15 23:40:12,508 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:40:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 23:40:12,528 INFO L93 Difference]: Finished difference Result 108 states and 115 transitions. [2023-02-15 23:40:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 23:40:12,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2023-02-15 23:40:12,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 23:40:12,538 INFO L225 Difference]: With dead ends: 108 [2023-02-15 23:40:12,538 INFO L226 Difference]: Without dead ends: 77 [2023-02-15 23:40:12,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 238 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-02-15 23:40:12,540 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 23:40:12,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 108 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 23:40:12,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-15 23:40:12,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-02-15 23:40:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 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 23:40:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2023-02-15 23:40:12,555 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 120 [2023-02-15 23:40:12,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 23:40:12,555 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2023-02-15 23:40:12,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-15 23:40:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2023-02-15 23:40:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-02-15 23:40:12,556 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 23:40:12,556 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 23:40:12,562 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 23:40:12,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:12,762 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 23:40:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 23:40:12,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1529370487, now seen corresponding path program 7 times [2023-02-15 23:40:12,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 23:40:12,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91483258] [2023-02-15 23:40:12,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 23:40:12,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 23:40:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:40,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-15 23:40:40,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:45,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-15 23:40:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:50,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2023-02-15 23:40:50,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:54,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 19 proven. 1125 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 23:40:54,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 23:40:54,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91483258] [2023-02-15 23:40:54,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91483258] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 23:40:54,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520418317] [2023-02-15 23:40:54,696 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 23:40:54,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 23:40:54,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 23:40:54,697 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 23:40:54,700 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 23:40:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 23:40:54,910 WARN L261 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 263 conjunts are in the unsatisfiable core [2023-02-15 23:40:54,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 23:40:55,945 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 13 treesize of output 9 [2023-02-15 23:41:00,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:41:00,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:41:00,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:41:00,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-15 23:41:40,520 WARN L233 SmtUtils]: Spent 39.59s on a formula simplification. DAG size of input: 2009 DAG size of output: 409 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-02-15 23:41:40,521 INFO L321 Elim1Store]: treesize reduction 7278, result has 15.0 percent of original size [2023-02-15 23:41:40,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 35 select indices, 35 select index equivalence classes, 10 disjoint index pairs (out of 595 index pairs), introduced 35 new quantified variables, introduced 625 case distinctions, treesize of input 2130 treesize of output 1919