./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/bitvector/soft_float_2a.c.cil.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 f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 11:04:15,368 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 11:04:15,370 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 11:04:15,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 11:04:15,395 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 11:04:15,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 11:04:15,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 11:04:15,398 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 11:04:15,400 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 11:04:15,400 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 11:04:15,401 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 11:04:15,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 11:04:15,403 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 11:04:15,403 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 11:04:15,404 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 11:04:15,405 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 11:04:15,406 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 11:04:15,407 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 11:04:15,408 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 11:04:15,410 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 11:04:15,411 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 11:04:15,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 11:04:15,415 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 11:04:15,416 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 11:04:15,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 11:04:15,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 11:04:15,419 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 11:04:15,419 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 11:04:15,420 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 11:04:15,420 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 11:04:15,421 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 11:04:15,421 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 11:04:15,422 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 11:04:15,423 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 11:04:15,423 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 11:04:15,424 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 11:04:15,424 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 11:04:15,425 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 11:04:15,425 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 11:04:15,425 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 11:04:15,426 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 11:04:15,431 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 11:04:15,433 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 11:04:15,465 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 11:04:15,469 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 11:04:15,469 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 11:04:15,469 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 11:04:15,470 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 11:04:15,470 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 11:04:15,470 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 11:04:15,471 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 11:04:15,471 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 11:04:15,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 11:04:15,472 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 11:04:15,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 11:04:15,472 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 11:04:15,472 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 11:04:15,472 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 11:04:15,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 11:04:15,473 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 11:04:15,473 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 11:04:15,473 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 11:04:15,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 11:04:15,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 11:04:15,475 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 11:04:15,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 11:04:15,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 11:04:15,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:04:15,476 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 11:04:15,476 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 11:04:15,476 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 11:04:15,476 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 11:04:15,476 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 11:04:15,477 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 11:04:15,477 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 11:04:15,477 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 11:04:15,477 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c [2022-07-22 11:04:15,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 11:04:15,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 11:04:15,704 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 11:04:15,705 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 11:04:15,705 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 11:04:15,706 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2022-07-22 11:04:15,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03c12c53c/fc7c85c4292645079982f4fadd614de4/FLAGe20bbfdf8 [2022-07-22 11:04:16,144 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 11:04:16,145 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2022-07-22 11:04:16,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03c12c53c/fc7c85c4292645079982f4fadd614de4/FLAGe20bbfdf8 [2022-07-22 11:04:16,165 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03c12c53c/fc7c85c4292645079982f4fadd614de4 [2022-07-22 11:04:16,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 11:04:16,169 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 11:04:16,170 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 11:04:16,170 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 11:04:16,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 11:04:16,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:04:16" (1/1) ... [2022-07-22 11:04:16,174 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@141a245a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16, skipping insertion in model container [2022-07-22 11:04:16,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 11:04:16" (1/1) ... [2022-07-22 11:04:16,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 11:04:16,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 11:04:16,320 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[728,741] [2022-07-22 11:04:16,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:04:16,375 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 11:04:16,384 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[728,741] [2022-07-22 11:04:16,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 11:04:16,443 INFO L208 MainTranslator]: Completed translation [2022-07-22 11:04:16,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16 WrapperNode [2022-07-22 11:04:16,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 11:04:16,445 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 11:04:16,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 11:04:16,446 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 11:04:16,452 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16" (1/1) ... [2022-07-22 11:04:16,461 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16" (1/1) ... [2022-07-22 11:04:16,487 INFO L137 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 178 [2022-07-22 11:04:16,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 11:04:16,488 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 11:04:16,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 11:04:16,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 11:04:16,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16" (1/1) ... [2022-07-22 11:04:16,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16" (1/1) ... [2022-07-22 11:04:16,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16" (1/1) ... [2022-07-22 11:04:16,496 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16" (1/1) ... [2022-07-22 11:04:16,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16" (1/1) ... [2022-07-22 11:04:16,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16" (1/1) ... [2022-07-22 11:04:16,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16" (1/1) ... [2022-07-22 11:04:16,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 11:04:16,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 11:04:16,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 11:04:16,527 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 11:04:16,527 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16" (1/1) ... [2022-07-22 11:04:16,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 11:04:16,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:16,549 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) [2022-07-22 11:04:16,551 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 [2022-07-22 11:04:16,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 11:04:16,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 11:04:16,577 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2022-07-22 11:04:16,577 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2022-07-22 11:04:16,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 11:04:16,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 11:04:16,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 11:04:16,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 11:04:16,635 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 11:04:16,636 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 11:04:16,966 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 11:04:16,972 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 11:04:16,972 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 11:04:16,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:04:16 BoogieIcfgContainer [2022-07-22 11:04:16,979 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 11:04:16,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 11:04:16,983 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 11:04:16,985 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 11:04:16,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 11:04:16" (1/3) ... [2022-07-22 11:04:16,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38990503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:04:16, skipping insertion in model container [2022-07-22 11:04:16,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 11:04:16" (2/3) ... [2022-07-22 11:04:16,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38990503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 11:04:16, skipping insertion in model container [2022-07-22 11:04:16,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 11:04:16" (3/3) ... [2022-07-22 11:04:16,988 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2022-07-22 11:04:17,003 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 11:04:17,003 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 11:04:17,053 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 11:04:17,059 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@23ba3f9c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@34e28392 [2022-07-22 11:04:17,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 11:04:17,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 88 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 81 states have internal predecessors, (135), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 11:04:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-22 11:04:17,072 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:17,072 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:17,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:17,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:17,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1735976372, now seen corresponding path program 1 times [2022-07-22 11:04:17,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:17,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558452312] [2022-07-22 11:04:17,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:17,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:17,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:04:17,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 11:04:17,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:17,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558452312] [2022-07-22 11:04:17,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558452312] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:17,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:17,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:17,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135046539] [2022-07-22 11:04:17,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:17,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:17,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:17,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:17,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:17,391 INFO L87 Difference]: Start difference. First operand has 88 states, 79 states have (on average 1.7088607594936709) internal successors, (135), 81 states have internal predecessors, (135), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:17,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:17,463 INFO L93 Difference]: Finished difference Result 225 states and 381 transitions. [2022-07-22 11:04:17,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:04:17,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 42 [2022-07-22 11:04:17,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:17,473 INFO L225 Difference]: With dead ends: 225 [2022-07-22 11:04:17,473 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 11:04:17,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:17,480 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 96 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:17,481 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 338 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:17,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 11:04:17,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-07-22 11:04:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 75 states have (on average 1.5066666666666666) internal successors, (113), 75 states have internal predecessors, (113), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 11:04:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 122 transitions. [2022-07-22 11:04:17,528 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 122 transitions. Word has length 42 [2022-07-22 11:04:17,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:17,529 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 122 transitions. [2022-07-22 11:04:17,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:17,529 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 122 transitions. [2022-07-22 11:04:17,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 11:04:17,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:17,532 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:17,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 11:04:17,535 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:17,537 INFO L85 PathProgramCache]: Analyzing trace with hash 235851622, now seen corresponding path program 1 times [2022-07-22 11:04:17,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:17,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613742124] [2022-07-22 11:04:17,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:17,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:17,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:17,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:04:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,686 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 11:04:17,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:17,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613742124] [2022-07-22 11:04:17,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613742124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:17,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:17,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 11:04:17,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890132888] [2022-07-22 11:04:17,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:17,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:04:17,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:04:17,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:17,695 INFO L87 Difference]: Start difference. First operand 82 states and 122 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:17,750 INFO L93 Difference]: Finished difference Result 139 states and 208 transitions. [2022-07-22 11:04:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:17,750 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2022-07-22 11:04:17,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:17,752 INFO L225 Difference]: With dead ends: 139 [2022-07-22 11:04:17,752 INFO L226 Difference]: Without dead ends: 90 [2022-07-22 11:04:17,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:17,754 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 151 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:17,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 437 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-07-22 11:04:17,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 82. [2022-07-22 11:04:17,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 75 states have (on average 1.4933333333333334) internal successors, (112), 75 states have internal predecessors, (112), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 11:04:17,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 121 transitions. [2022-07-22 11:04:17,764 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 121 transitions. Word has length 44 [2022-07-22 11:04:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:17,764 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 121 transitions. [2022-07-22 11:04:17,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:17,765 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 121 transitions. [2022-07-22 11:04:17,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 11:04:17,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:17,767 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:17,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 11:04:17,767 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash -350954392, now seen corresponding path program 1 times [2022-07-22 11:04:17,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903132616] [2022-07-22 11:04:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:17,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:17,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-22 11:04:17,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 11:04:17,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,893 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 11:04:17,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:17,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903132616] [2022-07-22 11:04:17,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903132616] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:17,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448878603] [2022-07-22 11:04:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:17,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:17,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:17,896 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) [2022-07-22 11:04:17,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 11:04:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:17,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-22 11:04:17,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:18,188 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 11:04:18,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:18,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 11:04:18,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448878603] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:18,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:18,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 7] total 16 [2022-07-22 11:04:18,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788534267] [2022-07-22 11:04:18,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:18,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 11:04:18,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:18,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 11:04:18,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-07-22 11:04:18,407 INFO L87 Difference]: Start difference. First operand 82 states and 121 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 11:04:19,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:19,009 INFO L93 Difference]: Finished difference Result 298 states and 478 transitions. [2022-07-22 11:04:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 11:04:19,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 44 [2022-07-22 11:04:19,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:19,014 INFO L225 Difference]: With dead ends: 298 [2022-07-22 11:04:19,016 INFO L226 Difference]: Without dead ends: 219 [2022-07-22 11:04:19,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 11:04:19,021 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 376 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:19,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 978 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:04:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-07-22 11:04:19,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 156. [2022-07-22 11:04:19,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 145 states have (on average 1.4827586206896552) internal successors, (215), 146 states have internal predecessors, (215), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-22 11:04:19,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 236 transitions. [2022-07-22 11:04:19,063 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 236 transitions. Word has length 44 [2022-07-22 11:04:19,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:19,063 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 236 transitions. [2022-07-22 11:04:19,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 13 states have internal predecessors, (54), 4 states have call successors, (10), 3 states have call predecessors, (10), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 11:04:19,064 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 236 transitions. [2022-07-22 11:04:19,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-22 11:04:19,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:19,070 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:19,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:19,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:19,292 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:19,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:19,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1691479718, now seen corresponding path program 1 times [2022-07-22 11:04:19,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:19,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218995145] [2022-07-22 11:04:19,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:19,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-22 11:04:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 11:04:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 11:04:19,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:19,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218995145] [2022-07-22 11:04:19,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218995145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:19,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253851057] [2022-07-22 11:04:19,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:19,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:19,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:19,359 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) [2022-07-22 11:04:19,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 11:04:19,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 11:04:19,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:19,461 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:04:19,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:19,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253851057] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:19,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:04:19,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-22 11:04:19,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148531022] [2022-07-22 11:04:19,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:19,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:19,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:19,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:19,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:04:19,470 INFO L87 Difference]: Start difference. First operand 156 states and 236 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:19,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:19,521 INFO L93 Difference]: Finished difference Result 314 states and 477 transitions. [2022-07-22 11:04:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:04:19,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2022-07-22 11:04:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:19,526 INFO L225 Difference]: With dead ends: 314 [2022-07-22 11:04:19,526 INFO L226 Difference]: Without dead ends: 165 [2022-07-22 11:04:19,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-22 11:04:19,528 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 28 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:19,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 310 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-07-22 11:04:19,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 161. [2022-07-22 11:04:19,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.476510067114094) internal successors, (220), 151 states have internal predecessors, (220), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-22 11:04:19,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 244 transitions. [2022-07-22 11:04:19,542 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 244 transitions. Word has length 49 [2022-07-22 11:04:19,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:19,542 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 244 transitions. [2022-07-22 11:04:19,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:19,542 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 244 transitions. [2022-07-22 11:04:19,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-22 11:04:19,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:19,547 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:19,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 11:04:19,769 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 [2022-07-22 11:04:19,770 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:19,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:19,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1041889728, now seen corresponding path program 1 times [2022-07-22 11:04:19,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:19,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877850066] [2022-07-22 11:04:19,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:19,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-22 11:04:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 11:04:19,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 11:04:19,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:19,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877850066] [2022-07-22 11:04:19,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877850066] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:19,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972258128] [2022-07-22 11:04:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:19,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:19,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:19,876 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) [2022-07-22 11:04:19,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 11:04:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:19,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-22 11:04:19,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 11:04:19,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:20,039 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 11:04:20,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972258128] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:20,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:20,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-07-22 11:04:20,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301657840] [2022-07-22 11:04:20,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:20,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-22 11:04:20,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:20,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-22 11:04:20,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:04:20,042 INFO L87 Difference]: Start difference. First operand 161 states and 244 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 11:04:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:20,358 INFO L93 Difference]: Finished difference Result 458 states and 734 transitions. [2022-07-22 11:04:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 11:04:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2022-07-22 11:04:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:20,363 INFO L225 Difference]: With dead ends: 458 [2022-07-22 11:04:20,363 INFO L226 Difference]: Without dead ends: 304 [2022-07-22 11:04:20,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2022-07-22 11:04:20,364 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 420 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:20,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [420 Valid, 646 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:04:20,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-22 11:04:20,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 177. [2022-07-22 11:04:20,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 165 states have (on average 1.509090909090909) internal successors, (249), 167 states have internal predecessors, (249), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-22 11:04:20,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 273 transitions. [2022-07-22 11:04:20,394 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 273 transitions. Word has length 52 [2022-07-22 11:04:20,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:20,394 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 273 transitions. [2022-07-22 11:04:20,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 11:04:20,394 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 273 transitions. [2022-07-22 11:04:20,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 11:04:20,396 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:20,396 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:20,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:20,616 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 [2022-07-22 11:04:20,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:20,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:20,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1267071326, now seen corresponding path program 1 times [2022-07-22 11:04:20,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:20,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714621727] [2022-07-22 11:04:20,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:20,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:20,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:20,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:20,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:20,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 11:04:20,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:20,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 11:04:20,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:20,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 11:04:20,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714621727] [2022-07-22 11:04:20,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714621727] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:20,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378141066] [2022-07-22 11:04:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:20,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:20,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:20,749 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) [2022-07-22 11:04:20,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 11:04:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:20,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 11:04:20,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 11:04:20,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 11:04:20,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378141066] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:20,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 11:04:20,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 7] total 14 [2022-07-22 11:04:20,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562095489] [2022-07-22 11:04:20,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:20,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 11:04:20,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:20,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 11:04:20,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:04:20,935 INFO L87 Difference]: Start difference. First operand 177 states and 273 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:20,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:20,982 INFO L93 Difference]: Finished difference Result 194 states and 291 transitions. [2022-07-22 11:04:20,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:20,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2022-07-22 11:04:20,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:20,988 INFO L225 Difference]: With dead ends: 194 [2022-07-22 11:04:20,988 INFO L226 Difference]: Without dead ends: 188 [2022-07-22 11:04:20,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-07-22 11:04:20,991 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 16 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:20,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 461 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-07-22 11:04:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2022-07-22 11:04:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 174 states have (on average 1.4885057471264367) internal successors, (259), 176 states have internal predecessors, (259), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-22 11:04:21,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 283 transitions. [2022-07-22 11:04:21,009 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 283 transitions. Word has length 56 [2022-07-22 11:04:21,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:21,009 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 283 transitions. [2022-07-22 11:04:21,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:21,009 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 283 transitions. [2022-07-22 11:04:21,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-22 11:04:21,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:21,011 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:21,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:21,223 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 [2022-07-22 11:04:21,223 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:21,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1324329628, now seen corresponding path program 1 times [2022-07-22 11:04:21,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:21,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805425123] [2022-07-22 11:04:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:21,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:21,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 11:04:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-22 11:04:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 11:04:21,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:21,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805425123] [2022-07-22 11:04:21,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805425123] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:21,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:21,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 11:04:21,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230873188] [2022-07-22 11:04:21,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:21,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 11:04:21,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:21,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 11:04:21,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-22 11:04:21,285 INFO L87 Difference]: Start difference. First operand 186 states and 283 transitions. Second operand has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:21,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:21,331 INFO L93 Difference]: Finished difference Result 212 states and 324 transitions. [2022-07-22 11:04:21,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 11:04:21,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 56 [2022-07-22 11:04:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:21,333 INFO L225 Difference]: With dead ends: 212 [2022-07-22 11:04:21,333 INFO L226 Difference]: Without dead ends: 201 [2022-07-22 11:04:21,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:04:21,334 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 38 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:21,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 668 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-22 11:04:21,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 181. [2022-07-22 11:04:21,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 169 states have (on average 1.4792899408284024) internal successors, (250), 171 states have internal predecessors, (250), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-22 11:04:21,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 274 transitions. [2022-07-22 11:04:21,343 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 274 transitions. Word has length 56 [2022-07-22 11:04:21,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:21,343 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 274 transitions. [2022-07-22 11:04:21,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.0) internal successors, (36), 5 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:21,344 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 274 transitions. [2022-07-22 11:04:21,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-22 11:04:21,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:21,346 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:21,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 11:04:21,346 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash -475999289, now seen corresponding path program 1 times [2022-07-22 11:04:21,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:21,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872627599] [2022-07-22 11:04:21,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:21,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:21,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-22 11:04:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-22 11:04:21,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 11:04:21,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:21,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872627599] [2022-07-22 11:04:21,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872627599] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:21,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421597995] [2022-07-22 11:04:21,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:21,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:21,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:21,456 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) [2022-07-22 11:04:21,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 11:04:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:21,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 11:04:21,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-22 11:04:21,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 11:04:21,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421597995] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:21,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:21,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 15 [2022-07-22 11:04:21,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119164123] [2022-07-22 11:04:21,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:21,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 11:04:21,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:21,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 11:04:21,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:04:21,744 INFO L87 Difference]: Start difference. First operand 181 states and 274 transitions. Second operand has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 12 states have internal predecessors, (88), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-22 11:04:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:22,662 INFO L93 Difference]: Finished difference Result 466 states and 730 transitions. [2022-07-22 11:04:22,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 11:04:22,663 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 12 states have internal predecessors, (88), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 58 [2022-07-22 11:04:22,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:22,665 INFO L225 Difference]: With dead ends: 466 [2022-07-22 11:04:22,665 INFO L226 Difference]: Without dead ends: 287 [2022-07-22 11:04:22,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=565, Invalid=1985, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 11:04:22,667 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 559 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:22,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [559 Valid, 693 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:04:22,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-22 11:04:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 126. [2022-07-22 11:04:22,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 117 states have (on average 1.5042735042735043) internal successors, (176), 117 states have internal predecessors, (176), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 11:04:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 189 transitions. [2022-07-22 11:04:22,679 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 189 transitions. Word has length 58 [2022-07-22 11:04:22,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:22,679 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 189 transitions. [2022-07-22 11:04:22,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.866666666666666) internal successors, (88), 12 states have internal predecessors, (88), 4 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-22 11:04:22,680 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 189 transitions. [2022-07-22 11:04:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-22 11:04:22,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:22,681 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:22,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:22,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:22,905 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:22,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:22,905 INFO L85 PathProgramCache]: Analyzing trace with hash -355472767, now seen corresponding path program 1 times [2022-07-22 11:04:22,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:22,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69452157] [2022-07-22 11:04:22,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:22,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:22,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:22,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:22,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:22,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 11:04:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:22,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 11:04:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 11:04:22,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:22,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69452157] [2022-07-22 11:04:22,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69452157] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:22,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:22,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:22,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480042411] [2022-07-22 11:04:22,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:22,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:22,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:22,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:22,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:22,966 INFO L87 Difference]: Start difference. First operand 126 states and 189 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:23,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:23,015 INFO L93 Difference]: Finished difference Result 199 states and 295 transitions. [2022-07-22 11:04:23,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:04:23,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 73 [2022-07-22 11:04:23,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:23,017 INFO L225 Difference]: With dead ends: 199 [2022-07-22 11:04:23,017 INFO L226 Difference]: Without dead ends: 158 [2022-07-22 11:04:23,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:23,019 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 49 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:23,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 291 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:23,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-07-22 11:04:23,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 127. [2022-07-22 11:04:23,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 118 states have (on average 1.4915254237288136) internal successors, (176), 118 states have internal predecessors, (176), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 11:04:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 189 transitions. [2022-07-22 11:04:23,029 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 189 transitions. Word has length 73 [2022-07-22 11:04:23,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:23,029 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 189 transitions. [2022-07-22 11:04:23,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 189 transitions. [2022-07-22 11:04:23,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-22 11:04:23,030 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:23,030 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:23,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 11:04:23,031 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:23,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:23,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1607504626, now seen corresponding path program 1 times [2022-07-22 11:04:23,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:23,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417114091] [2022-07-22 11:04:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:23,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 11:04:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 11:04:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 11:04:23,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:23,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417114091] [2022-07-22 11:04:23,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417114091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:23,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:23,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-22 11:04:23,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937369310] [2022-07-22 11:04:23,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:23,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:04:23,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:23,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:04:23,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-22 11:04:23,124 INFO L87 Difference]: Start difference. First operand 127 states and 189 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:23,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:23,219 INFO L93 Difference]: Finished difference Result 236 states and 345 transitions. [2022-07-22 11:04:23,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 11:04:23,219 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 76 [2022-07-22 11:04:23,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:23,221 INFO L225 Difference]: With dead ends: 236 [2022-07-22 11:04:23,221 INFO L226 Difference]: Without dead ends: 182 [2022-07-22 11:04:23,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-22 11:04:23,222 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 82 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:23,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 829 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:23,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-22 11:04:23,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 133. [2022-07-22 11:04:23,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.4754098360655739) internal successors, (180), 124 states have internal predecessors, (180), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 11:04:23,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 195 transitions. [2022-07-22 11:04:23,231 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 195 transitions. Word has length 76 [2022-07-22 11:04:23,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:23,232 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 195 transitions. [2022-07-22 11:04:23,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 7 states have internal predecessors, (57), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:23,232 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 195 transitions. [2022-07-22 11:04:23,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-22 11:04:23,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:23,233 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:23,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 11:04:23,235 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:23,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:23,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1656623811, now seen corresponding path program 1 times [2022-07-22 11:04:23,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:23,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241818733] [2022-07-22 11:04:23,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:23,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:23,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:23,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 11:04:23,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 11:04:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-22 11:04:23,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:23,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241818733] [2022-07-22 11:04:23,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241818733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:23,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 11:04:23,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 11:04:23,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461761933] [2022-07-22 11:04:23,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:23,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:23,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:23,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:23,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:23,278 INFO L87 Difference]: Start difference. First operand 133 states and 195 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:23,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:23,304 INFO L93 Difference]: Finished difference Result 186 states and 274 transitions. [2022-07-22 11:04:23,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 11:04:23,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 80 [2022-07-22 11:04:23,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:23,306 INFO L225 Difference]: With dead ends: 186 [2022-07-22 11:04:23,306 INFO L226 Difference]: Without dead ends: 153 [2022-07-22 11:04:23,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:23,307 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 35 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 305 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 [2022-07-22 11:04:23,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 305 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:23,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-07-22 11:04:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 133. [2022-07-22 11:04:23,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 122 states have (on average 1.4672131147540983) internal successors, (179), 124 states have internal predecessors, (179), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-22 11:04:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 194 transitions. [2022-07-22 11:04:23,317 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 194 transitions. Word has length 80 [2022-07-22 11:04:23,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:23,318 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 194 transitions. [2022-07-22 11:04:23,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 194 transitions. [2022-07-22 11:04:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 11:04:23,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:23,319 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:23,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 11:04:23,319 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:23,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1819933303, now seen corresponding path program 1 times [2022-07-22 11:04:23,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:23,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909264511] [2022-07-22 11:04:23,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:23,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:23,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:23,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 11:04:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 11:04:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:04:23,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:23,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909264511] [2022-07-22 11:04:23,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909264511] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:23,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707968705] [2022-07-22 11:04:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:23,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:23,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:23,405 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) [2022-07-22 11:04:23,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 11:04:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 11:04:23,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:04:23,564 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:23,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707968705] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:23,564 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:04:23,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 15 [2022-07-22 11:04:23,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859846987] [2022-07-22 11:04:23,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:23,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 11:04:23,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:23,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 11:04:23,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-07-22 11:04:23,566 INFO L87 Difference]: Start difference. First operand 133 states and 194 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:23,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:23,668 INFO L93 Difference]: Finished difference Result 270 states and 379 transitions. [2022-07-22 11:04:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 11:04:23,671 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 83 [2022-07-22 11:04:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:23,673 INFO L225 Difference]: With dead ends: 270 [2022-07-22 11:04:23,673 INFO L226 Difference]: Without dead ends: 228 [2022-07-22 11:04:23,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2022-07-22 11:04:23,673 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 225 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:23,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 963 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:23,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-07-22 11:04:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 161. [2022-07-22 11:04:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 149 states have (on average 1.4026845637583893) internal successors, (209), 151 states have internal predecessors, (209), 5 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-07-22 11:04:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 226 transitions. [2022-07-22 11:04:23,685 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 226 transitions. Word has length 83 [2022-07-22 11:04:23,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:23,685 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 226 transitions. [2022-07-22 11:04:23,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:23,685 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 226 transitions. [2022-07-22 11:04:23,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 11:04:23,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:23,686 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:23,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:23,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:23,899 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:23,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:23,900 INFO L85 PathProgramCache]: Analyzing trace with hash 551805959, now seen corresponding path program 1 times [2022-07-22 11:04:23,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:23,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262753302] [2022-07-22 11:04:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:23,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 11:04:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-22 11:04:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:04:23,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:23,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262753302] [2022-07-22 11:04:23,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262753302] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:23,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145253160] [2022-07-22 11:04:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:23,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:23,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:23,977 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) [2022-07-22 11:04:24,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 11:04:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 11:04:24,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:24,143 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:04:24,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 11:04:24,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145253160] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:24,209 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:24,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-07-22 11:04:24,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232892938] [2022-07-22 11:04:24,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:24,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 11:04:24,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:24,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 11:04:24,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2022-07-22 11:04:24,210 INFO L87 Difference]: Start difference. First operand 161 states and 226 transitions. Second operand has 16 states, 16 states have (on average 5.5625) internal successors, (89), 13 states have internal predecessors, (89), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:04:24,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:24,364 INFO L93 Difference]: Finished difference Result 368 states and 513 transitions. [2022-07-22 11:04:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 11:04:24,364 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 13 states have internal predecessors, (89), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2022-07-22 11:04:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:24,366 INFO L225 Difference]: With dead ends: 368 [2022-07-22 11:04:24,366 INFO L226 Difference]: Without dead ends: 283 [2022-07-22 11:04:24,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 166 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-07-22 11:04:24,367 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 177 mSDsluCounter, 2561 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 2803 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:24,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 2803 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-07-22 11:04:24,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 158. [2022-07-22 11:04:24,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 147 states have (on average 1.380952380952381) internal successors, (203), 148 states have internal predecessors, (203), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 11:04:24,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 217 transitions. [2022-07-22 11:04:24,378 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 217 transitions. Word has length 83 [2022-07-22 11:04:24,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:24,378 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 217 transitions. [2022-07-22 11:04:24,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.5625) internal successors, (89), 13 states have internal predecessors, (89), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 11:04:24,379 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 217 transitions. [2022-07-22 11:04:24,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 11:04:24,380 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:24,380 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:24,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:24,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:24,595 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:24,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:24,596 INFO L85 PathProgramCache]: Analyzing trace with hash -66223114, now seen corresponding path program 2 times [2022-07-22 11:04:24,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:24,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932091603] [2022-07-22 11:04:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:24,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 11:04:24,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 11:04:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:24,708 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 11:04:24,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:24,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932091603] [2022-07-22 11:04:24,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932091603] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:24,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5994167] [2022-07-22 11:04:24,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:04:24,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:24,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:24,710 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) [2022-07-22 11:04:24,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 11:04:24,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-22 11:04:24,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:04:24,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 11:04:24,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 11:04:24,848 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:24,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5994167] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:24,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:04:24,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 14 [2022-07-22 11:04:24,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526443680] [2022-07-22 11:04:24,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:24,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 11:04:24,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:24,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 11:04:24,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:04:24,850 INFO L87 Difference]: Start difference. First operand 158 states and 217 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:25,048 INFO L93 Difference]: Finished difference Result 312 states and 426 transitions. [2022-07-22 11:04:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 11:04:25,049 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 87 [2022-07-22 11:04:25,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:25,050 INFO L225 Difference]: With dead ends: 312 [2022-07-22 11:04:25,050 INFO L226 Difference]: Without dead ends: 271 [2022-07-22 11:04:25,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:04:25,051 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 295 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:25,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 1091 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-07-22 11:04:25,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 168. [2022-07-22 11:04:25,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 157 states have (on average 1.356687898089172) internal successors, (213), 158 states have internal predecessors, (213), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 11:04:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 227 transitions. [2022-07-22 11:04:25,062 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 227 transitions. Word has length 87 [2022-07-22 11:04:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:25,063 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 227 transitions. [2022-07-22 11:04:25,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-07-22 11:04:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 227 transitions. [2022-07-22 11:04:25,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 11:04:25,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:25,066 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:25,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:25,279 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,SelfDestructingSolverStorable13 [2022-07-22 11:04:25,280 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:25,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash 152631604, now seen corresponding path program 1 times [2022-07-22 11:04:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:25,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771916338] [2022-07-22 11:04:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:25,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:25,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:25,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:25,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-07-22 11:04:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:25,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-22 11:04:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 11:04:25,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:25,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771916338] [2022-07-22 11:04:25,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771916338] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:25,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754850694] [2022-07-22 11:04:25,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:25,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:25,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:25,393 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) [2022-07-22 11:04:25,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 11:04:25,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 11:04:25,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:25,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 11:04:25,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754850694] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:25,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:25,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2022-07-22 11:04:25,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670374915] [2022-07-22 11:04:25,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:25,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 11:04:25,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:25,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 11:04:25,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-07-22 11:04:25,615 INFO L87 Difference]: Start difference. First operand 168 states and 227 transitions. Second operand has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 13 states have internal predecessors, (102), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 11:04:28,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:28,316 INFO L93 Difference]: Finished difference Result 477 states and 689 transitions. [2022-07-22 11:04:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 11:04:28,317 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 13 states have internal predecessors, (102), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 87 [2022-07-22 11:04:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:28,319 INFO L225 Difference]: With dead ends: 477 [2022-07-22 11:04:28,319 INFO L226 Difference]: Without dead ends: 318 [2022-07-22 11:04:28,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=344, Invalid=845, Unknown=1, NotChecked=0, Total=1190 [2022-07-22 11:04:28,320 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 398 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:28,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [398 Valid, 583 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 11:04:28,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-22 11:04:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 172. [2022-07-22 11:04:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 161 states have (on average 1.3354037267080745) internal successors, (215), 162 states have internal predecessors, (215), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 11:04:28,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 229 transitions. [2022-07-22 11:04:28,333 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 229 transitions. Word has length 87 [2022-07-22 11:04:28,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:28,334 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 229 transitions. [2022-07-22 11:04:28,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.285714285714286) internal successors, (102), 13 states have internal predecessors, (102), 2 states have call successors, (11), 3 states have call predecessors, (11), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-22 11:04:28,334 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 229 transitions. [2022-07-22 11:04:28,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-22 11:04:28,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:28,335 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:28,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:28,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 11:04:28,562 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:28,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:28,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1886336854, now seen corresponding path program 1 times [2022-07-22 11:04:28,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:28,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879782810] [2022-07-22 11:04:28,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:28,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:28,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:28,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:28,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:28,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:28,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 11:04:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:28,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-22 11:04:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 11:04:28,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:28,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879782810] [2022-07-22 11:04:28,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879782810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:28,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365855754] [2022-07-22 11:04:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:28,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:28,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:28,656 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) [2022-07-22 11:04:28,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 11:04:28,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:28,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 11:04:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 11:04:28,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:28,942 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 11:04:28,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365855754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:28,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:28,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-07-22 11:04:28,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556949421] [2022-07-22 11:04:28,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:28,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 11:04:28,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:28,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 11:04:28,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-07-22 11:04:28,944 INFO L87 Difference]: Start difference. First operand 172 states and 229 transitions. Second operand has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 11:04:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:29,542 INFO L93 Difference]: Finished difference Result 625 states and 909 transitions. [2022-07-22 11:04:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 11:04:29,542 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 89 [2022-07-22 11:04:29,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:29,545 INFO L225 Difference]: With dead ends: 625 [2022-07-22 11:04:29,545 INFO L226 Difference]: Without dead ends: 456 [2022-07-22 11:04:29,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=679, Invalid=1391, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 11:04:29,546 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 988 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 988 SdHoareTripleChecker+Valid, 831 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:29,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [988 Valid, 831 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 11:04:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-07-22 11:04:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 193. [2022-07-22 11:04:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 182 states have (on average 1.3516483516483517) internal successors, (246), 183 states have internal predecessors, (246), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-22 11:04:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 260 transitions. [2022-07-22 11:04:29,565 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 260 transitions. Word has length 89 [2022-07-22 11:04:29,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:29,566 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 260 transitions. [2022-07-22 11:04:29,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.523809523809524) internal successors, (116), 20 states have internal predecessors, (116), 2 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-22 11:04:29,566 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 260 transitions. [2022-07-22 11:04:29,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 11:04:29,567 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:29,568 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:29,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:29,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 11:04:29,791 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:29,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:29,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1033497780, now seen corresponding path program 2 times [2022-07-22 11:04:29,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:29,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814105230] [2022-07-22 11:04:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:29,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:29,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:29,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:29,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-07-22 11:04:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:29,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-07-22 11:04:29,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:29,950 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 11:04:29,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:29,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814105230] [2022-07-22 11:04:29,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814105230] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:29,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731303551] [2022-07-22 11:04:29,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 11:04:29,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:29,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:29,952 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:29,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 11:04:30,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 11:04:30,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 11:04:30,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-22 11:04:30,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:30,211 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-22 11:04:30,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:30,587 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-22 11:04:30,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731303551] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:30,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:30,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-07-22 11:04:30,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481593353] [2022-07-22 11:04:30,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:30,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 11:04:30,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:30,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 11:04:30,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2022-07-22 11:04:30,589 INFO L87 Difference]: Start difference. First operand 193 states and 260 transitions. Second operand has 29 states, 29 states have (on average 4.0) internal successors, (116), 24 states have internal predecessors, (116), 6 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 11:04:32,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:32,252 INFO L93 Difference]: Finished difference Result 496 states and 711 transitions. [2022-07-22 11:04:32,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-22 11:04:32,255 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.0) internal successors, (116), 24 states have internal predecessors, (116), 6 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) Word has length 99 [2022-07-22 11:04:32,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:32,256 INFO L225 Difference]: With dead ends: 496 [2022-07-22 11:04:32,256 INFO L226 Difference]: Without dead ends: 304 [2022-07-22 11:04:32,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=866, Invalid=4390, Unknown=0, NotChecked=0, Total=5256 [2022-07-22 11:04:32,259 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 895 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 884 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 911 SdHoareTripleChecker+Valid, 1159 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:32,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [911 Valid, 1159 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 884 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 11:04:32,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-07-22 11:04:32,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 193. [2022-07-22 11:04:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 182 states have (on average 1.3516483516483517) internal successors, (246), 183 states have internal predecessors, (246), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 11:04:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 259 transitions. [2022-07-22 11:04:32,274 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 259 transitions. Word has length 99 [2022-07-22 11:04:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:32,274 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 259 transitions. [2022-07-22 11:04:32,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.0) internal successors, (116), 24 states have internal predecessors, (116), 6 states have call successors, (12), 3 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-22 11:04:32,275 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 259 transitions. [2022-07-22 11:04:32,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-22 11:04:32,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:32,276 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:32,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:32,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 11:04:32,481 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:32,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1305340779, now seen corresponding path program 1 times [2022-07-22 11:04:32,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:32,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271379410] [2022-07-22 11:04:32,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:32,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:32,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 11:04:32,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-07-22 11:04:32,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,540 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-22 11:04:32,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:32,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271379410] [2022-07-22 11:04:32,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271379410] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:32,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728124474] [2022-07-22 11:04:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:32,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:32,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:32,542 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:32,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 11:04:32,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:32,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 11:04:32,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-22 11:04:32,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:32,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728124474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:32,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:04:32,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-07-22 11:04:32,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700934043] [2022-07-22 11:04:32,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:32,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 11:04:32,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:32,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 11:04:32,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:32,634 INFO L87 Difference]: Start difference. First operand 193 states and 259 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:32,682 INFO L93 Difference]: Finished difference Result 396 states and 544 transitions. [2022-07-22 11:04:32,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 11:04:32,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 104 [2022-07-22 11:04:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:32,684 INFO L225 Difference]: With dead ends: 396 [2022-07-22 11:04:32,684 INFO L226 Difference]: Without dead ends: 212 [2022-07-22 11:04:32,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 11:04:32,685 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 10 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:32,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 200 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:32,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-07-22 11:04:32,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 195. [2022-07-22 11:04:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 184 states have (on average 1.3478260869565217) internal successors, (248), 185 states have internal predecessors, (248), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-22 11:04:32,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 261 transitions. [2022-07-22 11:04:32,700 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 261 transitions. Word has length 104 [2022-07-22 11:04:32,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:32,700 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 261 transitions. [2022-07-22 11:04:32,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:32,700 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 261 transitions. [2022-07-22 11:04:32,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-22 11:04:32,701 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:32,702 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:32,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:32,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 11:04:32,915 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:32,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:32,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1414826554, now seen corresponding path program 1 times [2022-07-22 11:04:32,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:32,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008292115] [2022-07-22 11:04:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:32,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 11:04:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 11:04:33,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-22 11:04:33,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:33,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008292115] [2022-07-22 11:04:33,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008292115] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:33,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249116279] [2022-07-22 11:04:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:33,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:33,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:33,048 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:33,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 11:04:33,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 11:04:33,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-22 11:04:33,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:33,255 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-22 11:04:33,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249116279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:33,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:33,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 11 [2022-07-22 11:04:33,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939386116] [2022-07-22 11:04:33,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:33,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 11:04:33,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:33,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 11:04:33,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-07-22 11:04:33,258 INFO L87 Difference]: Start difference. First operand 195 states and 261 transitions. Second operand has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 9 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:33,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:33,514 INFO L93 Difference]: Finished difference Result 526 states and 723 transitions. [2022-07-22 11:04:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 11:04:33,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 9 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 105 [2022-07-22 11:04:33,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:33,517 INFO L225 Difference]: With dead ends: 526 [2022-07-22 11:04:33,517 INFO L226 Difference]: Without dead ends: 493 [2022-07-22 11:04:33,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-07-22 11:04:33,520 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 450 mSDsluCounter, 1414 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 1622 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:33,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [450 Valid, 1622 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:33,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-07-22 11:04:33,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 241. [2022-07-22 11:04:33,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 227 states have (on average 1.2995594713656389) internal successors, (295), 228 states have internal predecessors, (295), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-22 11:04:33,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 319 transitions. [2022-07-22 11:04:33,541 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 319 transitions. Word has length 105 [2022-07-22 11:04:33,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:33,541 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 319 transitions. [2022-07-22 11:04:33,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.090909090909091) internal successors, (67), 9 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:33,542 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 319 transitions. [2022-07-22 11:04:33,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-22 11:04:33,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:33,543 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:33,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:33,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:33,762 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:33,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:33,762 INFO L85 PathProgramCache]: Analyzing trace with hash -579318152, now seen corresponding path program 1 times [2022-07-22 11:04:33,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:33,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510391491] [2022-07-22 11:04:33,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:33,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:33,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:33,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 11:04:33,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 11:04:33,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-22 11:04:33,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:33,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510391491] [2022-07-22 11:04:33,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510391491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:33,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961954191] [2022-07-22 11:04:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:33,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:33,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:33,862 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:33,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 11:04:33,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:33,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 11:04:33,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 11:04:34,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:34,213 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-07-22 11:04:34,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961954191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:34,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:34,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 19 [2022-07-22 11:04:34,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489043588] [2022-07-22 11:04:34,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:34,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 11:04:34,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:34,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 11:04:34,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:04:34,215 INFO L87 Difference]: Start difference. First operand 241 states and 319 transitions. Second operand has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 11:04:34,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:34,985 INFO L93 Difference]: Finished difference Result 634 states and 892 transitions. [2022-07-22 11:04:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 11:04:34,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 105 [2022-07-22 11:04:34,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:34,989 INFO L225 Difference]: With dead ends: 634 [2022-07-22 11:04:34,989 INFO L226 Difference]: Without dead ends: 555 [2022-07-22 11:04:34,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=310, Invalid=1670, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 11:04:34,990 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 911 mSDsluCounter, 1281 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 927 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:34,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [927 Valid, 1375 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 11:04:34,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2022-07-22 11:04:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 244. [2022-07-22 11:04:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 227 states have (on average 1.2907488986784141) internal successors, (293), 228 states have internal predecessors, (293), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (32), 11 states have call predecessors, (32), 6 states have call successors, (32) [2022-07-22 11:04:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 332 transitions. [2022-07-22 11:04:35,023 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 332 transitions. Word has length 105 [2022-07-22 11:04:35,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:35,024 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 332 transitions. [2022-07-22 11:04:35,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.842105263157895) internal successors, (92), 17 states have internal predecessors, (92), 4 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 11:04:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 332 transitions. [2022-07-22 11:04:35,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-22 11:04:35,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:35,026 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:35,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:35,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:35,248 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:35,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:35,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1689586168, now seen corresponding path program 1 times [2022-07-22 11:04:35,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:35,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379848799] [2022-07-22 11:04:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:35,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:35,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:35,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:35,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:35,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:35,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 11:04:35,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:35,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-22 11:04:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:35,350 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-22 11:04:35,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:35,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379848799] [2022-07-22 11:04:35,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379848799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:35,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291765065] [2022-07-22 11:04:35,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:35,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:35,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:35,356 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:35,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 11:04:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:35,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 11:04:35,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-22 11:04:35,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-22 11:04:35,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291765065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:35,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:35,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 10 [2022-07-22 11:04:35,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408964950] [2022-07-22 11:04:35,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:35,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 11:04:35,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:35,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 11:04:35,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 11:04:35,540 INFO L87 Difference]: Start difference. First operand 244 states and 332 transitions. Second operand has 10 states, 10 states have (on average 6.7) internal successors, (67), 8 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:35,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:35,710 INFO L93 Difference]: Finished difference Result 378 states and 525 transitions. [2022-07-22 11:04:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 11:04:35,711 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 8 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 105 [2022-07-22 11:04:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:35,712 INFO L225 Difference]: With dead ends: 378 [2022-07-22 11:04:35,712 INFO L226 Difference]: Without dead ends: 303 [2022-07-22 11:04:35,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 218 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-07-22 11:04:35,714 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 159 mSDsluCounter, 1016 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1180 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:35,714 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1180 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 11:04:35,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-22 11:04:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 230. [2022-07-22 11:04:35,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 214 states have (on average 1.308411214953271) internal successors, (280), 217 states have internal predecessors, (280), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (23), 8 states have call predecessors, (23), 5 states have call successors, (23) [2022-07-22 11:04:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 309 transitions. [2022-07-22 11:04:35,740 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 309 transitions. Word has length 105 [2022-07-22 11:04:35,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:35,740 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 309 transitions. [2022-07-22 11:04:35,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.7) internal successors, (67), 8 states have internal predecessors, (67), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:35,740 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 309 transitions. [2022-07-22 11:04:35,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-07-22 11:04:35,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:35,742 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:35,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:35,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:35,956 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:35,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:35,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1197064006, now seen corresponding path program 1 times [2022-07-22 11:04:35,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:35,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830529933] [2022-07-22 11:04:35,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:35,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:35,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:35,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:35,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 11:04:35,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:35,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-22 11:04:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-22 11:04:35,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:35,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830529933] [2022-07-22 11:04:35,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830529933] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:35,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192332361] [2022-07-22 11:04:35,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:35,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:35,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:36,000 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:36,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 11:04:36,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:36,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 11:04:36,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-22 11:04:36,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 11:04:36,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192332361] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 11:04:36,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 11:04:36,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-07-22 11:04:36,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226629231] [2022-07-22 11:04:36,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 11:04:36,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 11:04:36,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:36,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 11:04:36,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 11:04:36,089 INFO L87 Difference]: Start difference. First operand 230 states and 309 transitions. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:36,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:36,159 INFO L93 Difference]: Finished difference Result 476 states and 654 transitions. [2022-07-22 11:04:36,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 11:04:36,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 106 [2022-07-22 11:04:36,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:36,161 INFO L225 Difference]: With dead ends: 476 [2022-07-22 11:04:36,161 INFO L226 Difference]: Without dead ends: 255 [2022-07-22 11:04:36,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 11:04:36,163 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 14 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:36,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 316 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 11:04:36,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-22 11:04:36,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 235. [2022-07-22 11:04:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 219 states have (on average 1.3150684931506849) internal successors, (288), 222 states have internal predecessors, (288), 6 states have call successors, (6), 4 states have call predecessors, (6), 9 states have return successors, (23), 8 states have call predecessors, (23), 5 states have call successors, (23) [2022-07-22 11:04:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 317 transitions. [2022-07-22 11:04:36,183 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 317 transitions. Word has length 106 [2022-07-22 11:04:36,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:36,183 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 317 transitions. [2022-07-22 11:04:36,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-22 11:04:36,183 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 317 transitions. [2022-07-22 11:04:36,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-22 11:04:36,184 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 11:04:36,185 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 11:04:36,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-07-22 11:04:36,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-22 11:04:36,399 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 11:04:36,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 11:04:36,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1599024705, now seen corresponding path program 1 times [2022-07-22 11:04:36,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 11:04:36,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253547199] [2022-07-22 11:04:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:36,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 11:04:36,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:36,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 11:04:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:36,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-07-22 11:04:36,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:36,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-22 11:04:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:36,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-22 11:04:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 4 proven. 79 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 11:04:36,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 11:04:36,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253547199] [2022-07-22 11:04:36,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253547199] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 11:04:36,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221410628] [2022-07-22 11:04:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 11:04:36,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:36,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 11:04:36,576 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 11:04:36,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 11:04:36,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 11:04:36,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 11:04:36,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 11:04:36,807 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2022-07-22 11:04:36,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 11:04:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-22 11:04:38,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221410628] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 11:04:38,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 11:04:38,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12] total 27 [2022-07-22 11:04:38,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523986579] [2022-07-22 11:04:38,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 11:04:38,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 11:04:38,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 11:04:38,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 11:04:38,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-07-22 11:04:38,245 INFO L87 Difference]: Start difference. First operand 235 states and 317 transitions. Second operand has 27 states, 27 states have (on average 4.37037037037037) internal successors, (118), 23 states have internal predecessors, (118), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-22 11:04:39,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 11:04:39,998 INFO L93 Difference]: Finished difference Result 547 states and 789 transitions. [2022-07-22 11:04:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-22 11:04:39,998 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.37037037037037) internal successors, (118), 23 states have internal predecessors, (118), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) Word has length 107 [2022-07-22 11:04:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 11:04:39,999 INFO L225 Difference]: With dead ends: 547 [2022-07-22 11:04:39,999 INFO L226 Difference]: Without dead ends: 0 [2022-07-22 11:04:40,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=846, Invalid=4266, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 11:04:40,002 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 564 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 11:04:40,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 426 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 11:04:40,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-22 11:04:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-22 11:04:40,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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) [2022-07-22 11:04:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-22 11:04:40,003 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 107 [2022-07-22 11:04:40,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 11:04:40,003 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-22 11:04:40,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.37037037037037) internal successors, (118), 23 states have internal predecessors, (118), 5 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2022-07-22 11:04:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-22 11:04:40,004 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-22 11:04:40,006 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 11:04:40,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 11:04:40,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 11:04:40,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-22 11:05:03,275 WARN L233 SmtUtils]: Spent 19.87s on a formula simplification. DAG size of input: 136 DAG size of output: 129 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or)