./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 a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-?-a31fd05 [2023-02-15 09:14:16,488 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:14:16,490 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:14:16,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:14:16,512 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:14:16,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:14:16,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:14:16,516 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:14:16,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:14:16,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:14:16,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:14:16,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:14:16,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:14:16,521 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:14:16,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:14:16,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:14:16,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:14:16,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:14:16,525 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:14:16,527 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:14:16,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:14:16,529 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:14:16,529 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:14:16,530 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:14:16,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:14:16,533 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:14:16,533 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:14:16,534 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:14:16,534 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:14:16,535 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:14:16,535 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:14:16,536 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:14:16,537 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:14:16,537 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:14:16,538 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:14:16,538 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:14:16,539 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:14:16,539 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:14:16,540 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:14:16,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:14:16,541 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:14:16,542 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:14:16,559 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:14:16,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:14:16,560 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:14:16,560 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:14:16,561 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:14:16,561 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:14:16,562 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:14:16,562 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:14:16,562 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:14:16,562 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:14:16,563 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:14:16,563 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:14:16,563 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:14:16,563 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:14:16,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:14:16,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:14:16,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:14:16,564 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:14:16,565 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:14:16,565 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:14:16,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:14:16,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:14:16,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:14:16,566 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:14:16,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:14:16,566 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:14:16,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:14:16,567 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:14:16,567 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:14:16,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:14:16,567 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:14:16,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:14:16,568 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:14:16,568 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:14:16,568 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:14:16,568 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6060f0df556deb332d160eff8a39bcf699b67887fb6a475da5cd3837f5257af8 [2023-02-15 09:14:16,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:14:16,792 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:14:16,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:14:16,795 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:14:16,796 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:14:16,797 INFO L432 ainManager$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 [2023-02-15 09:14:17,918 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:14:18,095 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:14:18,096 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-02-15 09:14:18,101 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62f74a7f5/2a3475328dbb4ce087f20b9197164f15/FLAG554a8241a [2023-02-15 09:14:18,116 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62f74a7f5/2a3475328dbb4ce087f20b9197164f15 [2023-02-15 09:14:18,118 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:14:18,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:14:18,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:14:18,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:14:18,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:14:18,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c246c56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18, skipping insertion in model container [2023-02-15 09:14:18,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:14:18,149 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:14:18,289 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] [2023-02-15 09:14:18,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:14:18,303 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:14:18,320 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] [2023-02-15 09:14:18,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:14:18,332 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:14:18,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18 WrapperNode [2023-02-15 09:14:18,333 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:14:18,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:14:18,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:14:18,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:14:18,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,344 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,355 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2023-02-15 09:14:18,356 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:14:18,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:14:18,357 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:14:18,357 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:14:18,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,370 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:14:18,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:14:18,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:14:18,374 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:14:18,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18" (1/1) ... [2023-02-15 09:14:18,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:14:18,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:18,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 09:14:18,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 09:14:18,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:14:18,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:14:18,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 09:14:18,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:14:18,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:14:18,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:14:18,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:14:18,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 09:14:18,489 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:14:18,491 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:14:18,627 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:14:18,632 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:14:18,632 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 09:14:18,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:14:18 BoogieIcfgContainer [2023-02-15 09:14:18,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:14:18,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:14:18,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:14:18,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:14:18,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:14:18" (1/3) ... [2023-02-15 09:14:18,660 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5266cfad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:14:18, skipping insertion in model container [2023-02-15 09:14:18,660 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:18" (2/3) ... [2023-02-15 09:14:18,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5266cfad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:14:18, skipping insertion in model container [2023-02-15 09:14:18,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:14:18" (3/3) ... [2023-02-15 09:14:18,662 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2023-02-15 09:14:18,679 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:14:18,679 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:14:18,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:14:18,752 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;@52c9d621, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:14:18,752 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:14:18,755 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) [2023-02-15 09:14:18,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 09:14:18,759 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:18,759 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:18,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:18,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:18,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1960333522, now seen corresponding path program 1 times [2023-02-15 09:14:18,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:18,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598918504] [2023-02-15 09:14:18,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:18,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:14:18,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:18,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598918504] [2023-02-15 09:14:18,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598918504] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:14:18,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:14:18,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 09:14:18,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733650824] [2023-02-15 09:14:18,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:14:18,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:14:18,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:18,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:14:18,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:14:18,993 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) [2023-02-15 09:14:19,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:19,016 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2023-02-15 09:14:19,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:14:19,018 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 [2023-02-15 09:14:19,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:19,023 INFO L225 Difference]: With dead ends: 26 [2023-02-15 09:14:19,023 INFO L226 Difference]: Without dead ends: 13 [2023-02-15 09:14:19,025 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 [2023-02-15 09:14:19,028 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 [2023-02-15 09:14:19,028 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] [2023-02-15 09:14:19,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-15 09:14:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-02-15 09:14:19,047 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) [2023-02-15 09:14:19,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-02-15 09:14:19,048 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2023-02-15 09:14:19,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:19,049 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-02-15 09:14:19,049 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) [2023-02-15 09:14:19,049 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-02-15 09:14:19,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 09:14:19,050 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:19,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:19,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 09:14:19,050 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:19,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1620761708, now seen corresponding path program 1 times [2023-02-15 09:14:19,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:19,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661280157] [2023-02-15 09:14:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:19,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:14:19,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:19,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661280157] [2023-02-15 09:14:19,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661280157] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:19,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056726131] [2023-02-15 09:14:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:19,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:19,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:19,188 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:14:19,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 09:14:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:19,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 09:14:19,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:14:19,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:19,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:14:19,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056726131] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:19,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:19,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 09:14:19,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641765924] [2023-02-15 09:14:19,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:19,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 09:14:19,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:19,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 09:14:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:14:19,353 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) [2023-02-15 09:14:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:19,375 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-02-15 09:14:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 09:14:19,376 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 [2023-02-15 09:14:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:19,377 INFO L225 Difference]: With dead ends: 25 [2023-02-15 09:14:19,377 INFO L226 Difference]: Without dead ends: 18 [2023-02-15 09:14:19,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:14:19,379 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 [2023-02-15 09:14:19,379 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] [2023-02-15 09:14:19,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-15 09:14:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-15 09:14:19,383 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) [2023-02-15 09:14:19,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-02-15 09:14:19,383 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2023-02-15 09:14:19,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:19,384 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-02-15 09:14:19,384 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) [2023-02-15 09:14:19,384 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-02-15 09:14:19,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 09:14:19,385 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:19,385 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:19,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 09:14:19,591 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 [2023-02-15 09:14:19,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:19,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash 47568678, now seen corresponding path program 2 times [2023-02-15 09:14:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:19,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988718456] [2023-02-15 09:14:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:19,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:19,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 09:14:19,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:19,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988718456] [2023-02-15 09:14:19,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988718456] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:14:19,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:14:19,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 09:14:19,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079270656] [2023-02-15 09:14:19,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:14:19,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 09:14:19,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:19,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 09:14:19,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:14:19,822 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) [2023-02-15 09:14:19,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:19,861 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-02-15 09:14:19,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 09:14:19,862 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 [2023-02-15 09:14:19,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:19,863 INFO L225 Difference]: With dead ends: 23 [2023-02-15 09:14:19,863 INFO L226 Difference]: Without dead ends: 20 [2023-02-15 09:14:19,863 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 [2023-02-15 09:14:19,864 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 [2023-02-15 09:14:19,865 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] [2023-02-15 09:14:19,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-15 09:14:19,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-15 09:14:19,868 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) [2023-02-15 09:14:19,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-02-15 09:14:19,871 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2023-02-15 09:14:19,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:19,871 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-02-15 09:14:19,871 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) [2023-02-15 09:14:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-02-15 09:14:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 09:14:19,872 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:19,872 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:19,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 09:14:19,873 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:19,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1533228919, now seen corresponding path program 1 times [2023-02-15 09:14:19,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:19,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997669604] [2023-02-15 09:14:19,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:19,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:20,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:20,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997669604] [2023-02-15 09:14:20,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997669604] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:20,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211597258] [2023-02-15 09:14:20,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:20,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:20,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:20,025 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:14:20,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 09:14:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:14:20,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:20,146 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:20,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:20,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211597258] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:20,210 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:20,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-15 09:14:20,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054325319] [2023-02-15 09:14:20,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:20,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 09:14:20,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:20,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 09:14:20,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-15 09:14:20,220 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) [2023-02-15 09:14:20,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:20,268 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-02-15 09:14:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:14:20,269 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 [2023-02-15 09:14:20,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:20,270 INFO L225 Difference]: With dead ends: 41 [2023-02-15 09:14:20,271 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 09:14:20,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-15 09:14:20,273 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 [2023-02-15 09:14:20,273 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] [2023-02-15 09:14:20,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 09:14:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-15 09:14:20,277 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) [2023-02-15 09:14:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-02-15 09:14:20,279 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2023-02-15 09:14:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:20,279 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-02-15 09:14:20,280 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) [2023-02-15 09:14:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-02-15 09:14:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 09:14:20,281 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:20,281 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:20,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 09:14:20,487 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 [2023-02-15 09:14:20,487 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:20,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:20,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1092675971, now seen corresponding path program 2 times [2023-02-15 09:14:20,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:20,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188942268] [2023-02-15 09:14:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:20,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:20,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:20,747 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:20,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:20,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188942268] [2023-02-15 09:14:20,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188942268] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:20,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626296528] [2023-02-15 09:14:20,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:14:20,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:20,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:20,757 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) [2023-02-15 09:14:20,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 09:14:20,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:14:20,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:14:20,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 09:14:20,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:20,905 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:20,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:21,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626296528] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:21,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:21,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 09:14:21,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146382779] [2023-02-15 09:14:21,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:21,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 09:14:21,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:21,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 09:14:21,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-15 09:14:21,131 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) [2023-02-15 09:14:21,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:21,207 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-02-15 09:14:21,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 09:14:21,207 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 [2023-02-15 09:14:21,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:21,211 INFO L225 Difference]: With dead ends: 65 [2023-02-15 09:14:21,211 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 09:14:21,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-15 09:14:21,213 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:14:21,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 26 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:14:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 09:14:21,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-02-15 09:14:21,229 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) [2023-02-15 09:14:21,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-02-15 09:14:21,230 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2023-02-15 09:14:21,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:21,231 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-02-15 09:14:21,231 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) [2023-02-15 09:14:21,231 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-02-15 09:14:21,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 09:14:21,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:21,235 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:21,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 09:14:21,440 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 [2023-02-15 09:14:21,441 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:21,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1116944283, now seen corresponding path program 3 times [2023-02-15 09:14:21,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:21,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849838820] [2023-02-15 09:14:21,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:21,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:21,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:22,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:22,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849838820] [2023-02-15 09:14:22,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849838820] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:22,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129197965] [2023-02-15 09:14:22,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:14:22,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:22,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:22,018 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:14:22,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 09:14:22,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 09:14:22,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:14:22,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 09:14:22,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:22,134 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 [2023-02-15 09:14:22,166 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:14:22,167 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 19 [2023-02-15 09:14:22,272 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-02-15 09:14:22,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:22,361 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 [2023-02-15 09:14:22,366 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 26 treesize of output 20 [2023-02-15 09:14:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-02-15 09:14:22,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129197965] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:22,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:22,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 34 [2023-02-15 09:14:22,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595583910] [2023-02-15 09:14:22,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:22,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 09:14:22,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:22,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 09:14:22,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=793, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 09:14:22,387 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) [2023-02-15 09:14:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:22,641 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2023-02-15 09:14:22,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 09:14:22,642 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 [2023-02-15 09:14:22,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:22,642 INFO L225 Difference]: With dead ends: 74 [2023-02-15 09:14:22,643 INFO L226 Difference]: Without dead ends: 63 [2023-02-15 09:14:22,643 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 [2023-02-15 09:14:22,644 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 [2023-02-15 09:14:22,644 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] [2023-02-15 09:14:22,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-15 09:14:22,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2023-02-15 09:14:22,649 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) [2023-02-15 09:14:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2023-02-15 09:14:22,649 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2023-02-15 09:14:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:22,650 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2023-02-15 09:14:22,650 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) [2023-02-15 09:14:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2023-02-15 09:14:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-15 09:14:22,651 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:22,651 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:22,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 09:14:22,851 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 [2023-02-15 09:14:22,852 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:22,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:22,852 INFO L85 PathProgramCache]: Analyzing trace with hash 2050640041, now seen corresponding path program 4 times [2023-02-15 09:14:22,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:22,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382182139] [2023-02-15 09:14:22,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:22,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:23,424 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:23,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382182139] [2023-02-15 09:14:23,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382182139] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:23,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392612770] [2023-02-15 09:14:23,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:14:23,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:23,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:23,429 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:14:23,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 09:14:23,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:14:23,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:14:23,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 09:14:23,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:23,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:24,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392612770] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:24,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:24,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-02-15 09:14:24,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816805377] [2023-02-15 09:14:24,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:24,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-15 09:14:24,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:24,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-15 09:14:24,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 09:14:24,347 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) [2023-02-15 09:14:24,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:24,487 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2023-02-15 09:14:24,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-15 09:14:24,488 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 [2023-02-15 09:14:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:24,489 INFO L225 Difference]: With dead ends: 125 [2023-02-15 09:14:24,489 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 09:14:24,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 09:14:24,491 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 [2023-02-15 09:14:24,491 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] [2023-02-15 09:14:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 09:14:24,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-02-15 09:14:24,499 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) [2023-02-15 09:14:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2023-02-15 09:14:24,500 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 61 [2023-02-15 09:14:24,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:24,500 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2023-02-15 09:14:24,501 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) [2023-02-15 09:14:24,501 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2023-02-15 09:14:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-15 09:14:24,502 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:24,502 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:24,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 09:14:24,708 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 [2023-02-15 09:14:24,708 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:24,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash 747822775, now seen corresponding path program 5 times [2023-02-15 09:14:24,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:24,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711506718] [2023-02-15 09:14:24,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:24,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:26,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:26,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:26,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711506718] [2023-02-15 09:14:26,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711506718] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:26,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24409494] [2023-02-15 09:14:26,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:14:26,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:26,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:26,483 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:14:26,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 09:14:48,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2023-02-15 09:14:48,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:14:49,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 09:14:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:49,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:49,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:51,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:51,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24409494] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:51,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:51,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-02-15 09:14:51,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103144031] [2023-02-15 09:14:51,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:51,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-02-15 09:14:51,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:51,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-02-15 09:14:51,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 09:14:51,718 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) [2023-02-15 09:14:51,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:51,995 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2023-02-15 09:14:51,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-15 09:14:51,996 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 [2023-02-15 09:14:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:51,999 INFO L225 Difference]: With dead ends: 225 [2023-02-15 09:14:52,000 INFO L226 Difference]: Without dead ends: 212 [2023-02-15 09:14:52,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 09:14:52,003 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2023-02-15 09:14:52,004 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] [2023-02-15 09:14:52,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-02-15 09:14:52,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-02-15 09:14:52,028 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) [2023-02-15 09:14:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2023-02-15 09:14:52,029 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 111 [2023-02-15 09:14:52,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:52,029 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2023-02-15 09:14:52,029 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) [2023-02-15 09:14:52,030 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2023-02-15 09:14:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-02-15 09:14:52,036 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:52,036 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:52,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 09:14:52,259 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 [2023-02-15 09:14:52,260 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:52,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:52,260 INFO L85 PathProgramCache]: Analyzing trace with hash -248951725, now seen corresponding path program 6 times [2023-02-15 09:14:52,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:52,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092550598] [2023-02-15 09:14:52,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:52,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:58,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:58,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:58,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092550598] [2023-02-15 09:14:58,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092550598] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:58,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838106086] [2023-02-15 09:14:58,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:14:58,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:58,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:58,156 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:14:58,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 09:14:58,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 09:14:58,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:14:58,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 09:14:58,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:58,369 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 [2023-02-15 09:14:58,769 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2023-02-15 09:14:58,770 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 41 treesize of output 59 [2023-02-15 09:14:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-02-15 09:14:59,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:59,674 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 49 treesize of output 43 [2023-02-15 09:14:59,686 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:14:59,686 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 62 treesize of output 70 [2023-02-15 09:14:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-02-15 09:14:59,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838106086] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:59,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:59,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 11, 11] total 118 [2023-02-15 09:14:59,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371906068] [2023-02-15 09:14:59,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:59,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-02-15 09:14:59,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:59,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-02-15 09:14:59,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5126, Invalid=8680, Unknown=0, NotChecked=0, Total=13806 [2023-02-15 09:14:59,774 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) [2023-02-15 09:15:01,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:15:01,364 INFO L93 Difference]: Finished difference Result 240 states and 246 transitions. [2023-02-15 09:15:01,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2023-02-15 09:15:01,365 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 [2023-02-15 09:15:01,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:15:01,366 INFO L225 Difference]: With dead ends: 240 [2023-02-15 09:15:01,366 INFO L226 Difference]: Without dead ends: 223 [2023-02-15 09:15:01,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1986 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5281, Invalid=11489, Unknown=0, NotChecked=0, Total=16770 [2023-02-15 09:15:01,371 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 31 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 09:15:01,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 71 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 09:15:01,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-02-15 09:15:01,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2023-02-15 09:15:01,384 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) [2023-02-15 09:15:01,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2023-02-15 09:15:01,385 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 211 [2023-02-15 09:15:01,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:15:01,386 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2023-02-15 09:15:01,387 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) [2023-02-15 09:15:01,387 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2023-02-15 09:15:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-02-15 09:15:01,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:15:01,389 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:15:01,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 09:15:01,600 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 [2023-02-15 09:15:01,600 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:15:01,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:15:01,601 INFO L85 PathProgramCache]: Analyzing trace with hash 51532317, now seen corresponding path program 7 times [2023-02-15 09:15:01,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:15:01,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507331828] [2023-02-15 09:15:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:15:01,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:15:01,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:15:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:15:07,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:15:07,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507331828] [2023-02-15 09:15:07,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507331828] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:15:07,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215870229] [2023-02-15 09:15:07,035 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 09:15:07,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:15:07,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:15:07,036 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:15:07,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 09:15:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:15:07,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 101 conjunts are in the unsatisfiable core [2023-02-15 09:15:07,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:15:07,584 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:15:07,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:15:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:15:16,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215870229] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:15:16,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:15:16,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-02-15 09:15:16,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616449182] [2023-02-15 09:15:16,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:15:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-02-15 09:15:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:15:16,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-02-15 09:15:16,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-02-15 09:15:16,889 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) [2023-02-15 09:15:17,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:15:17,563 INFO L93 Difference]: Finished difference Result 445 states and 547 transitions. [2023-02-15 09:15:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-02-15 09:15:17,568 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 [2023-02-15 09:15:17,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:15:17,570 INFO L225 Difference]: With dead ends: 445 [2023-02-15 09:15:17,570 INFO L226 Difference]: Without dead ends: 424 [2023-02-15 09:15:17,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-02-15 09:15:17,573 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, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 09:15:17,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 09:15:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-02-15 09:15:17,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2023-02-15 09:15:17,583 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) [2023-02-15 09:15:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 425 transitions. [2023-02-15 09:15:17,584 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 425 transitions. Word has length 221 [2023-02-15 09:15:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:15:17,585 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 425 transitions. [2023-02-15 09:15:17,585 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) [2023-02-15 09:15:17,585 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 425 transitions. [2023-02-15 09:15:17,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2023-02-15 09:15:17,590 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:15:17,590 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:15:17,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 09:15:17,797 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 [2023-02-15 09:15:17,798 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:15:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:15:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2065698413, now seen corresponding path program 8 times [2023-02-15 09:15:17,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:15:17,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725230315] [2023-02-15 09:15:17,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:15:17,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:15:18,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:15:37,657 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:15:37,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:15:37,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725230315] [2023-02-15 09:15:37,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725230315] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:15:37,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337146437] [2023-02-15 09:15:37,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:15:37,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:15:37,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:15:37,665 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:15:37,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 09:15:38,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:15:38,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:15:38,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 1902 conjuncts, 202 conjunts are in the unsatisfiable core [2023-02-15 09:15:38,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:15:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:15:38,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:16:15,644 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:16:15,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337146437] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:16:15,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:16:15,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-02-15 09:16:15,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273386364] [2023-02-15 09:16:15,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:16:15,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-02-15 09:16:15,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:16:15,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-02-15 09:16:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2023-02-15 09:16:15,672 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) [2023-02-15 09:16:18,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:16:18,558 INFO L93 Difference]: Finished difference Result 849 states and 1052 transitions. [2023-02-15 09:16:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-02-15 09:16:18,559 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 [2023-02-15 09:16:18,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:16:18,562 INFO L225 Difference]: With dead ends: 849 [2023-02-15 09:16:18,562 INFO L226 Difference]: Without dead ends: 828 [2023-02-15 09:16:18,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 644 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 48.8s TimeCoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2023-02-15 09:16:18,570 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 [2023-02-15 09:16:18,571 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] [2023-02-15 09:16:18,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-02-15 09:16:18,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2023-02-15 09:16:18,588 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) [2023-02-15 09:16:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 829 transitions. [2023-02-15 09:16:18,590 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 829 transitions. Word has length 423 [2023-02-15 09:16:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:16:18,591 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 829 transitions. [2023-02-15 09:16:18,592 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) [2023-02-15 09:16:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 829 transitions. [2023-02-15 09:16:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2023-02-15 09:16:18,611 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:16:18,611 INFO L195 NwaCegarLoop]: trace histogram [402, 402, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:16:18,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 09:16:18,820 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 [2023-02-15 09:16:18,821 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:16:18,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:16:18,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1050784257, now seen corresponding path program 9 times [2023-02-15 09:16:18,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:16:18,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746114907] [2023-02-15 09:16:18,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:16:18,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:16:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:17:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 161660 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:17:51,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:17:51,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746114907] [2023-02-15 09:17:51,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746114907] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:17:51,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969345300] [2023-02-15 09:17:51,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:17:51,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:17:51,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:17:51,448 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:17:51,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 09:17:51,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-15 09:17:51,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:17:51,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 09:17:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:17:52,022 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-15 09:17:55,630 INFO L321 Elim1Store]: treesize reduction 24, result has 86.4 percent of original size [2023-02-15 09:17:55,631 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 84 treesize of output 183 [2023-02-15 09:17:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 161660 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2023-02-15 09:17:56,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:18:00,722 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 116 treesize of output 102 [2023-02-15 09:18:00,768 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:18:00,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 149 treesize of output 220 [2023-02-15 09:18:01,063 INFO L134 CoverageAnalysis]: Checked inductivity of 161660 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2023-02-15 09:18:01,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969345300] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:18:01,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:18:01,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 19, 19] total 438 [2023-02-15 09:18:01,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609536333] [2023-02-15 09:18:01,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:18:01,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 438 states [2023-02-15 09:18:01,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:18:01,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 438 interpolants. [2023-02-15 09:18:01,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82054, Invalid=109352, Unknown=0, NotChecked=0, Total=191406 [2023-02-15 09:18:01,091 INFO L87 Difference]: Start difference. First operand 828 states and 829 transitions. Second operand has 438 states, 438 states have (on average 1.952054794520548) internal successors, (855), 438 states have internal predecessors, (855), 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)