./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 04:35:16,501 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 04:35:16,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 04:35:16,525 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 04:35:16,526 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 04:35:16,527 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 04:35:16,528 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 04:35:16,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 04:35:16,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 04:35:16,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 04:35:16,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 04:35:16,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 04:35:16,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 04:35:16,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 04:35:16,544 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 04:35:16,546 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 04:35:16,547 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 04:35:16,548 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 04:35:16,549 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 04:35:16,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 04:35:16,555 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 04:35:16,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 04:35:16,557 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 04:35:16,558 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 04:35:16,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 04:35:16,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 04:35:16,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 04:35:16,566 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 04:35:16,567 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 04:35:16,567 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 04:35:16,568 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 04:35:16,569 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 04:35:16,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 04:35:16,571 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 04:35:16,572 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 04:35:16,572 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 04:35:16,573 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 04:35:16,573 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 04:35:16,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 04:35:16,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 04:35:16,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 04:35:16,576 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 04:35:16,611 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 04:35:16,611 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 04:35:16,612 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 04:35:16,612 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 04:35:16,613 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 04:35:16,613 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 04:35:16,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 04:35:16,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 04:35:16,614 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 04:35:16,614 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 04:35:16,615 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 04:35:16,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 04:35:16,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 04:35:16,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 04:35:16,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 04:35:16,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 04:35:16,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 04:35:16,616 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 04:35:16,617 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 04:35:16,617 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 04:35:16,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 04:35:16,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 04:35:16,617 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 04:35:16,618 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 04:35:16,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 04:35:16,618 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 04:35:16,618 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 04:35:16,618 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 04:35:16,619 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 04:35:16,619 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 04:35:16,619 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 04:35:16,619 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 04:35:16,619 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 04:35:16,620 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 04:35:16,620 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 04:35:16,620 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 [2023-02-17 04:35:16,833 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 04:35:16,864 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 04:35:16,866 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 04:35:16,867 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 04:35:16,867 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 04:35:16,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-02-17 04:35:18,047 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 04:35:18,236 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 04:35:18,236 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-02-17 04:35:18,241 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b63aa18e/1e592559d6794f03ad4d67d11338103f/FLAGbbc2ce002 [2023-02-17 04:35:18,256 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b63aa18e/1e592559d6794f03ad4d67d11338103f [2023-02-17 04:35:18,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 04:35:18,260 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 04:35:18,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 04:35:18,264 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 04:35:18,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 04:35:18,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f892ab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18, skipping insertion in model container [2023-02-17 04:35:18,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 04:35:18,294 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 04:35:18,422 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2023-02-17 04:35:18,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 04:35:18,436 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 04:35:18,449 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2023-02-17 04:35:18,451 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 04:35:18,459 INFO L208 MainTranslator]: Completed translation [2023-02-17 04:35:18,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18 WrapperNode [2023-02-17 04:35:18,460 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 04:35:18,460 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 04:35:18,460 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 04:35:18,461 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 04:35:18,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,472 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,491 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2023-02-17 04:35:18,491 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 04:35:18,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 04:35:18,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 04:35:18,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 04:35:18,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,504 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,504 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,511 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,513 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 04:35:18,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 04:35:18,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 04:35:18,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 04:35:18,517 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18" (1/1) ... [2023-02-17 04:35:18,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 04:35:18,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:35:18,544 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) [2023-02-17 04:35:18,567 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 [2023-02-17 04:35:18,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 04:35:18,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 04:35:18,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 04:35:18,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 04:35:18,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 04:35:18,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 04:35:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 04:35:18,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 04:35:18,645 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 04:35:18,647 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 04:35:18,791 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 04:35:18,795 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 04:35:18,798 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-17 04:35:18,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 04:35:18 BoogieIcfgContainer [2023-02-17 04:35:18,800 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 04:35:18,802 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 04:35:18,802 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 04:35:18,805 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 04:35:18,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 04:35:18" (1/3) ... [2023-02-17 04:35:18,806 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae65a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 04:35:18, skipping insertion in model container [2023-02-17 04:35:18,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 04:35:18" (2/3) ... [2023-02-17 04:35:18,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ae65a66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 04:35:18, skipping insertion in model container [2023-02-17 04:35:18,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 04:35:18" (3/3) ... [2023-02-17 04:35:18,808 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2023-02-17 04:35:18,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 04:35:18,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 04:35:18,877 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 04:35:18,882 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;@1ea2da2b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 04:35:18,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 04:35:18,885 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:18,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-17 04:35:18,889 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:35:18,889 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:35:18,890 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:35:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:35:18,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1960333522, now seen corresponding path program 1 times [2023-02-17 04:35:18,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:35:18,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611269225] [2023-02-17 04:35:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:35:18,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:35:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:35:19,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:35:19,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611269225] [2023-02-17 04:35:19,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611269225] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:35:19,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:35:19,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 04:35:19,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995657163] [2023-02-17 04:35:19,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:35:19,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 04:35:19,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:35:19,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 04:35:19,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 04:35:19,178 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:19,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:35:19,202 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2023-02-17 04:35:19,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 04:35:19,204 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-17 04:35:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:35:19,210 INFO L225 Difference]: With dead ends: 26 [2023-02-17 04:35:19,210 INFO L226 Difference]: Without dead ends: 13 [2023-02-17 04:35:19,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 04:35:19,220 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 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 [2023-02-17 04:35:19,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:35:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-17 04:35:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-02-17 04:35:19,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:19,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-02-17 04:35:19,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2023-02-17 04:35:19,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:35:19,246 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-02-17 04:35:19,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:19,246 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-02-17 04:35:19,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-17 04:35:19,247 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:35:19,247 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:35:19,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 04:35:19,247 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:35:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:35:19,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1620761708, now seen corresponding path program 1 times [2023-02-17 04:35:19,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:35:19,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472564967] [2023-02-17 04:35:19,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:35:19,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:35:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:35:19,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:35:19,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472564967] [2023-02-17 04:35:19,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472564967] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:35:19,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025124727] [2023-02-17 04:35:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:35:19,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:19,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:35:19,384 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) [2023-02-17 04:35:19,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 04:35:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:19,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 04:35:19,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:35:19,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:35:19,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:35:19,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 04:35:19,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025124727] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:35:19,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:35:19,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-17 04:35:19,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492768008] [2023-02-17 04:35:19,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:35:19,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 04:35:19,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:35:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 04:35:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-17 04:35:19,502 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:19,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:35:19,536 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-02-17 04:35:19,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 04:35:19,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-17 04:35:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:35:19,537 INFO L225 Difference]: With dead ends: 25 [2023-02-17 04:35:19,538 INFO L226 Difference]: Without dead ends: 18 [2023-02-17 04:35:19,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-17 04:35:19,539 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 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 [2023-02-17 04:35:19,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:35:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-17 04:35:19,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-17 04:35:19,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:19,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-02-17 04:35:19,543 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2023-02-17 04:35:19,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:35:19,544 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-02-17 04:35:19,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:19,544 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-02-17 04:35:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-17 04:35:19,544 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:35:19,545 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:35:19,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 04:35:19,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:19,751 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:35:19,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:35:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash 47568678, now seen corresponding path program 2 times [2023-02-17 04:35:19,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:35:19,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803755553] [2023-02-17 04:35:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:35:19,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:35:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:19,902 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-17 04:35:19,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:35:19,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803755553] [2023-02-17 04:35:19,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803755553] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 04:35:19,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 04:35:19,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 04:35:19,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496466790] [2023-02-17 04:35:19,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 04:35:19,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 04:35:19,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:35:19,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 04:35:19,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 04:35:19,905 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:19,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:35:19,940 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-02-17 04:35:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 04:35:19,941 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-17 04:35:19,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:35:19,942 INFO L225 Difference]: With dead ends: 23 [2023-02-17 04:35:19,942 INFO L226 Difference]: Without dead ends: 20 [2023-02-17 04:35:19,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-17 04:35:19,944 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:35:19,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:35:19,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-17 04:35:19,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-17 04:35:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-02-17 04:35:19,952 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2023-02-17 04:35:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:35:19,953 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-02-17 04:35:19,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:19,954 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-02-17 04:35:19,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 04:35:19,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:35:19,955 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:35:19,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 04:35:19,956 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:35:19,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:35:19,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1533228919, now seen corresponding path program 1 times [2023-02-17 04:35:19,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:35:19,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765978334] [2023-02-17 04:35:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:35:19,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:35:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:20,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:35:20,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:35:20,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765978334] [2023-02-17 04:35:20,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765978334] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:35:20,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385907230] [2023-02-17 04:35:20,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:35:20,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:20,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:35:20,069 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) [2023-02-17 04:35:20,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 04:35:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:20,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 04:35:20,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:35:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:35:20,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:35:20,245 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:35:20,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385907230] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:35:20,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:35:20,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-17 04:35:20,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74293938] [2023-02-17 04:35:20,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:35:20,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 04:35:20,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:35:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 04:35:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-17 04:35:20,253 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:20,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:35:20,297 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-02-17 04:35:20,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 04:35:20,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-17 04:35:20,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:35:20,300 INFO L225 Difference]: With dead ends: 41 [2023-02-17 04:35:20,300 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 04:35:20,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-17 04:35:20,302 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:35:20,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:35:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 04:35:20,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-17 04:35:20,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:20,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-02-17 04:35:20,317 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2023-02-17 04:35:20,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:35:20,318 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-02-17 04:35:20,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:20,318 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-02-17 04:35:20,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 04:35:20,319 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:35:20,319 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:35:20,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 04:35:20,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-17 04:35:20,525 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:35:20,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:35:20,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1092675971, now seen corresponding path program 2 times [2023-02-17 04:35:20,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:35:20,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837816120] [2023-02-17 04:35:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:35:20,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:35:20,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:35:20,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:35:20,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837816120] [2023-02-17 04:35:20,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837816120] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:35:20,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446328294] [2023-02-17 04:35:20,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:35:20,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:20,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:35:20,757 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) [2023-02-17 04:35:20,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 04:35:20,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:35:20,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:35:20,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 04:35:20,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:35:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:35:20,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:35:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:35:21,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446328294] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:35:21,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:35:21,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-17 04:35:21,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080430387] [2023-02-17 04:35:21,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:35:21,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 04:35:21,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:35:21,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 04:35:21,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-17 04:35:21,080 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:35:21,138 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-02-17 04:35:21,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 04:35:21,139 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-17 04:35:21,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:35:21,139 INFO L225 Difference]: With dead ends: 65 [2023-02-17 04:35:21,140 INFO L226 Difference]: Without dead ends: 56 [2023-02-17 04:35:21,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-17 04:35:21,141 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 04:35:21,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 04:35:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-17 04:35:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-02-17 04:35:21,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-02-17 04:35:21,147 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2023-02-17 04:35:21,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:35:21,147 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-02-17 04:35:21,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:21,147 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-02-17 04:35:21,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 04:35:21,149 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:35:21,149 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:35:21,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 04:35:21,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:21,355 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:35:21,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:35:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash -1116944283, now seen corresponding path program 3 times [2023-02-17 04:35:21,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:35:21,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424720435] [2023-02-17 04:35:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:35:21,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:35:21,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:21,839 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 04:35:21,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:35:21,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424720435] [2023-02-17 04:35:21,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424720435] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:35:21,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230271218] [2023-02-17 04:35:21,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:35:21,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:21,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:35:21,842 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) [2023-02-17 04:35:21,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 04:35:21,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-17 04:35:21,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:35:21,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-17 04:35:21,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:35:21,950 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 15 treesize of output 11 [2023-02-17 04:35:21,971 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:35:21,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2023-02-17 04:35:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-02-17 04:35:22,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:35:22,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-02-17 04:35:22,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2023-02-17 04:35:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-02-17 04:35:22,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230271218] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:35:22,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:35:22,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 34 [2023-02-17 04:35:22,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977980944] [2023-02-17 04:35:22,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:35:22,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-17 04:35:22,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:35:22,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-17 04:35:22,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 04:35:22,164 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:22,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:35:22,372 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2023-02-17 04:35:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-17 04:35:22,372 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-17 04:35:22,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:35:22,373 INFO L225 Difference]: With dead ends: 74 [2023-02-17 04:35:22,373 INFO L226 Difference]: Without dead ends: 63 [2023-02-17 04:35:22,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=383, Invalid=1177, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 04:35:22,374 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 15 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:35:22,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:35:22,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-17 04:35:22,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2023-02-17 04:35:22,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2023-02-17 04:35:22,380 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2023-02-17 04:35:22,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:35:22,380 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2023-02-17 04:35:22,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:22,381 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2023-02-17 04:35:22,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-17 04:35:22,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:35:22,381 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:35:22,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 04:35:22,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:22,590 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:35:22,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:35:22,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2050640041, now seen corresponding path program 4 times [2023-02-17 04:35:22,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:35:22,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747399535] [2023-02-17 04:35:22,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:35:22,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:35:22,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 04:35:23,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:35:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747399535] [2023-02-17 04:35:23,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747399535] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:35:23,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879786334] [2023-02-17 04:35:23,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 04:35:23,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:23,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:35:23,083 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) [2023-02-17 04:35:23,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 04:35:23,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 04:35:23,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:35:23,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-17 04:35:23,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:35:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 04:35:23,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:35:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 04:35:24,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879786334] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:35:24,075 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:35:24,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-02-17 04:35:24,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348571334] [2023-02-17 04:35:24,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:35:24,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-17 04:35:24,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:35:24,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-17 04:35:24,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 04:35:24,081 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:35:24,198 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2023-02-17 04:35:24,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-17 04:35:24,199 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-02-17 04:35:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:35:24,203 INFO L225 Difference]: With dead ends: 125 [2023-02-17 04:35:24,203 INFO L226 Difference]: Without dead ends: 112 [2023-02-17 04:35:24,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 74 SyntacticMatches, 23 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 04:35:24,205 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 04:35:24,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 04:35:24,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-17 04:35:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-02-17 04:35:24,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2023-02-17 04:35:24,215 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 61 [2023-02-17 04:35:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:35:24,215 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2023-02-17 04:35:24,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:24,216 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2023-02-17 04:35:24,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-17 04:35:24,217 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:35:24,217 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:35:24,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 04:35:24,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:24,418 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:35:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:35:24,418 INFO L85 PathProgramCache]: Analyzing trace with hash 747822775, now seen corresponding path program 5 times [2023-02-17 04:35:24,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:35:24,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033132535] [2023-02-17 04:35:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:35:24,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:35:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:26,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 04:35:26,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:35:26,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033132535] [2023-02-17 04:35:26,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033132535] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:35:26,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262007034] [2023-02-17 04:35:26,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 04:35:26,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:26,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:35:26,377 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) [2023-02-17 04:35:26,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 04:35:29,530 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2023-02-17 04:35:29,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:35:29,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-17 04:35:29,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:35:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 04:35:30,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:35:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 04:35:32,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262007034] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:35:32,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:35:32,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-02-17 04:35:32,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738136997] [2023-02-17 04:35:32,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:35:32,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-02-17 04:35:32,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:35:32,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-02-17 04:35:32,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-17 04:35:32,970 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:33,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:35:33,246 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2023-02-17 04:35:33,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-17 04:35:33,247 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-02-17 04:35:33,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:35:33,250 INFO L225 Difference]: With dead ends: 225 [2023-02-17 04:35:33,250 INFO L226 Difference]: Without dead ends: 212 [2023-02-17 04:35:33,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 124 SyntacticMatches, 48 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-17 04:35:33,255 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 04:35:33,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 04:35:33,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-02-17 04:35:33,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-02-17 04:35:33,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:33,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2023-02-17 04:35:33,281 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 111 [2023-02-17 04:35:33,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:35:33,281 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2023-02-17 04:35:33,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:33,282 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2023-02-17 04:35:33,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-02-17 04:35:33,291 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:35:33,291 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:35:33,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 04:35:33,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:33,492 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:35:33,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:35:33,493 INFO L85 PathProgramCache]: Analyzing trace with hash -248951725, now seen corresponding path program 6 times [2023-02-17 04:35:33,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:35:33,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262995784] [2023-02-17 04:35:33,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:35:33,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:35:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:39,017 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 04:35:39,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:35:39,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262995784] [2023-02-17 04:35:39,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262995784] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:35:39,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188239760] [2023-02-17 04:35:39,017 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 04:35:39,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:39,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:35:39,021 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) [2023-02-17 04:35:39,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 04:35:39,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-17 04:35:39,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:35:39,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 04:35:39,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:35:39,214 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 15 treesize of output 11 [2023-02-17 04:35:39,482 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:35:39,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 99 [2023-02-17 04:35:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-02-17 04:35:39,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:35:40,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2023-02-17 04:35:40,234 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:35:40,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 94 [2023-02-17 04:35:40,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-02-17 04:35:40,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188239760] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:35:40,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:35:40,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 11, 11] total 118 [2023-02-17 04:35:40,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653933309] [2023-02-17 04:35:40,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:35:40,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-02-17 04:35:40,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:35:40,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-02-17 04:35:40,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5123, Invalid=8683, Unknown=0, NotChecked=0, Total=13806 [2023-02-17 04:35:40,310 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 118 states, 118 states have (on average 1.9576271186440677) internal successors, (231), 118 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:35:41,579 INFO L93 Difference]: Finished difference Result 240 states and 246 transitions. [2023-02-17 04:35:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-02-17 04:35:41,579 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.9576271186440677) internal successors, (231), 118 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2023-02-17 04:35:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:35:41,580 INFO L225 Difference]: With dead ends: 240 [2023-02-17 04:35:41,581 INFO L226 Difference]: Without dead ends: 223 [2023-02-17 04:35:41,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1973 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=5274, Invalid=11496, Unknown=0, NotChecked=0, Total=16770 [2023-02-17 04:35:41,586 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 04:35:41,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 71 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 04:35:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-02-17 04:35:41,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2023-02-17 04:35:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2023-02-17 04:35:41,605 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 211 [2023-02-17 04:35:41,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:35:41,606 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2023-02-17 04:35:41,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.9576271186440677) internal successors, (231), 118 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:35:41,607 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2023-02-17 04:35:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-02-17 04:35:41,611 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:35:41,612 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:35:41,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 04:35:41,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:41,819 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:35:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:35:41,819 INFO L85 PathProgramCache]: Analyzing trace with hash 51532317, now seen corresponding path program 7 times [2023-02-17 04:35:41,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:35:41,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113059438] [2023-02-17 04:35:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:35:41,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:35:41,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:47,024 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-17 04:35:47,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:35:47,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113059438] [2023-02-17 04:35:47,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113059438] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:35:47,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766222664] [2023-02-17 04:35:47,025 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 04:35:47,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:35:47,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:35:47,026 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) [2023-02-17 04:35:47,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 04:35:47,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:35:47,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 101 conjunts are in the unsatisfiable core [2023-02-17 04:35:47,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:35:50,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-17 04:35:50,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:35:59,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-17 04:35:59,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766222664] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:35:59,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:35:59,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-02-17 04:35:59,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574613524] [2023-02-17 04:35:59,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:35:59,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-02-17 04:35:59,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:35:59,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-02-17 04:35:59,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-02-17 04:35:59,677 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:36:00,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:36:00,382 INFO L93 Difference]: Finished difference Result 445 states and 547 transitions. [2023-02-17 04:36:00,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-02-17 04:36:00,383 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2023-02-17 04:36:00,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:36:00,385 INFO L225 Difference]: With dead ends: 445 [2023-02-17 04:36:00,385 INFO L226 Difference]: Without dead ends: 424 [2023-02-17 04:36:00,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 242 SyntacticMatches, 99 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5444 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-02-17 04:36:00,389 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 04:36:00,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 04:36:00,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-02-17 04:36:00,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2023-02-17 04:36:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.0047281323877069) internal successors, (425), 423 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:36:00,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 425 transitions. [2023-02-17 04:36:00,400 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 425 transitions. Word has length 221 [2023-02-17 04:36:00,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:36:00,401 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 425 transitions. [2023-02-17 04:36:00,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:36:00,402 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 425 transitions. [2023-02-17 04:36:00,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2023-02-17 04:36:00,407 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:36:00,407 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:36:00,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-17 04:36:00,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-17 04:36:00,615 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:36:00,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:36:00,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2065698413, now seen corresponding path program 8 times [2023-02-17 04:36:00,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:36:00,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862196687] [2023-02-17 04:36:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:36:00,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:36:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:36:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-17 04:36:19,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:36:19,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862196687] [2023-02-17 04:36:19,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862196687] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:36:19,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251650610] [2023-02-17 04:36:19,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 04:36:19,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:36:19,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:36:19,937 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) [2023-02-17 04:36:19,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 04:36:20,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 04:36:20,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:36:20,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 1902 conjuncts, 202 conjunts are in the unsatisfiable core [2023-02-17 04:36:20,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:36:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-17 04:36:32,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 04:37:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-17 04:37:10,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251650610] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 04:37:10,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 04:37:10,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-02-17 04:37:10,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977346101] [2023-02-17 04:37:10,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 04:37:10,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-02-17 04:37:10,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 04:37:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-02-17 04:37:10,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2023-02-17 04:37:10,285 INFO L87 Difference]: Start difference. First operand 424 states and 425 transitions. Second operand has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:37:13,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 04:37:13,384 INFO L93 Difference]: Finished difference Result 849 states and 1052 transitions. [2023-02-17 04:37:13,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-02-17 04:37:13,385 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 423 [2023-02-17 04:37:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 04:37:13,389 INFO L225 Difference]: With dead ends: 849 [2023-02-17 04:37:13,389 INFO L226 Difference]: Without dead ends: 828 [2023-02-17 04:37:13,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 444 SyntacticMatches, 200 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21099 ImplicationChecksByTransitivity, 61.7s TimeCoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2023-02-17 04:37:13,396 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 04:37:13,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 04:37:13,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-02-17 04:37:13,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2023-02-17 04:37:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 1.0024183796856105) internal successors, (829), 827 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:37:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 829 transitions. [2023-02-17 04:37:13,415 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 829 transitions. Word has length 423 [2023-02-17 04:37:13,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 04:37:13,415 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 829 transitions. [2023-02-17 04:37:13,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 04:37:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 829 transitions. [2023-02-17 04:37:13,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2023-02-17 04:37:13,435 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 04:37:13,436 INFO L195 NwaCegarLoop]: trace histogram [402, 402, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 04:37:13,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 04:37:13,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:37:13,645 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 04:37:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 04:37:13,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1050784257, now seen corresponding path program 9 times [2023-02-17 04:37:13,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 04:37:13,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442341778] [2023-02-17 04:37:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 04:37:13,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 04:37:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 04:38:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 161660 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-17 04:38:39,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 04:38:39,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442341778] [2023-02-17 04:38:39,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442341778] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 04:38:39,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771547971] [2023-02-17 04:38:39,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 04:38:39,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 04:38:39,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 04:38:39,062 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) [2023-02-17 04:38:39,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 04:38:39,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-17 04:38:39,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 04:38:39,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-17 04:38:39,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 04:38:39,627 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 15 treesize of output 11 [2023-02-17 04:38:42,820 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 04:38:42,820 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 105 treesize of output 339