./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 3dbbec33 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-?-3dbbec3 [2023-02-14 10:48:51,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 10:48:51,647 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 10:48:51,692 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 10:48:51,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 10:48:51,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 10:48:51,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 10:48:51,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 10:48:51,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 10:48:51,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 10:48:51,711 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 10:48:51,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 10:48:51,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 10:48:51,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 10:48:51,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 10:48:51,720 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 10:48:51,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 10:48:51,722 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 10:48:51,723 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 10:48:51,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 10:48:51,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 10:48:51,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 10:48:51,733 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 10:48:51,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 10:48:51,740 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 10:48:51,741 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 10:48:51,741 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 10:48:51,743 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 10:48:51,743 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 10:48:51,744 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 10:48:51,744 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 10:48:51,744 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 10:48:51,746 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 10:48:51,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 10:48:51,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 10:48:51,747 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 10:48:51,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 10:48:51,748 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 10:48:51,748 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 10:48:51,749 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 10:48:51,750 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 10:48:51,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 10:48:51,781 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 10:48:51,781 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 10:48:51,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 10:48:51,782 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 10:48:51,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 10:48:51,783 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 10:48:51,783 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 10:48:51,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 10:48:51,784 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 10:48:51,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 10:48:51,785 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 10:48:51,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 10:48:51,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 10:48:51,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 10:48:51,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 10:48:51,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 10:48:51,786 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 10:48:51,786 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 10:48:51,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 10:48:51,786 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 10:48:51,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 10:48:51,787 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 10:48:51,787 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 10:48:51,787 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 10:48:51,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:48:51,787 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 10:48:51,788 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 10:48:51,788 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 10:48:51,788 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 10:48:51,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 10:48:51,789 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 10:48:51,789 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 10:48:51,789 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 10:48:51,789 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 10:48:51,790 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 10:48:51,790 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f330893f1140a32f6e6dacd6cc5115391759545d59ea17334f6f3b644ed5a51c [2023-02-14 10:48:51,985 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 10:48:52,001 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 10:48:52,003 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 10:48:52,004 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 10:48:52,004 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 10:48:52,005 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2023-02-14 10:48:53,089 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 10:48:53,238 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 10:48:53,239 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c [2023-02-14 10:48:53,243 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3177a0587/30622369227f451aa162899fd4681775/FLAGfe0b1a683 [2023-02-14 10:48:53,255 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3177a0587/30622369227f451aa162899fd4681775 [2023-02-14 10:48:53,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 10:48:53,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 10:48:53,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 10:48:53,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 10:48:53,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 10:48:53,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,262 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36f65c7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53, skipping insertion in model container [2023-02-14 10:48:53,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,267 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 10:48:53,298 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 10:48:53,383 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[728,741] [2023-02-14 10:48:53,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:48:53,420 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 10:48:53,428 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_2a.c.cil.c[728,741] [2023-02-14 10:48:53,453 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:48:53,464 INFO L208 MainTranslator]: Completed translation [2023-02-14 10:48:53,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53 WrapperNode [2023-02-14 10:48:53,465 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 10:48:53,465 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 10:48:53,466 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 10:48:53,466 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 10:48:53,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,497 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,527 INFO L138 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 166 [2023-02-14 10:48:53,528 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 10:48:53,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 10:48:53,531 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 10:48:53,532 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 10:48:53,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,549 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,573 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,574 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,576 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 10:48:53,577 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 10:48:53,577 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 10:48:53,577 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 10:48:53,578 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53" (1/1) ... [2023-02-14 10:48:53,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:48:53,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:53,638 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 10:48:53,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 10:48:53,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 10:48:53,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 10:48:53,670 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-14 10:48:53,670 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-14 10:48:53,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 10:48:53,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 10:48:53,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 10:48:53,671 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 10:48:53,740 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 10:48:53,743 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 10:48:54,040 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 10:48:54,045 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 10:48:54,046 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 10:48:54,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:48:54 BoogieIcfgContainer [2023-02-14 10:48:54,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 10:48:54,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 10:48:54,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 10:48:54,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 10:48:54,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:48:53" (1/3) ... [2023-02-14 10:48:54,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290c15ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:48:54, skipping insertion in model container [2023-02-14 10:48:54,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:48:53" (2/3) ... [2023-02-14 10:48:54,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290c15ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:48:54, skipping insertion in model container [2023-02-14 10:48:54,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:48:54" (3/3) ... [2023-02-14 10:48:54,053 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2023-02-14 10:48:54,066 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 10:48:54,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 10:48:54,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 10:48:54,107 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7b838e5e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 10:48:54,108 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 10:48:54,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 75 states, 66 states have (on average 1.606060606060606) internal successors, (106), 68 states have internal predecessors, (106), 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) [2023-02-14 10:48:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 10:48:54,118 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:54,119 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] [2023-02-14 10:48:54,119 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:54,124 INFO L85 PathProgramCache]: Analyzing trace with hash -793971860, now seen corresponding path program 1 times [2023-02-14 10:48:54,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:54,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171382968] [2023-02-14 10:48:54,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:54,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:48:54,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 10:48:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:48:54,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:54,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171382968] [2023-02-14 10:48:54,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171382968] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:48:54,476 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:48:54,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 10:48:54,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332205081] [2023-02-14 10:48:54,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:48:54,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 10:48:54,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:54,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 10:48:54,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 10:48:54,516 INFO L87 Difference]: Start difference. First operand has 75 states, 66 states have (on average 1.606060606060606) internal successors, (106), 68 states have internal predecessors, (106), 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 3 states, 3 states have (on average 7.0) 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) [2023-02-14 10:48:54,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:54,566 INFO L93 Difference]: Finished difference Result 181 states and 286 transitions. [2023-02-14 10:48:54,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 10:48:54,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) 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 [2023-02-14 10:48:54,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:54,580 INFO L225 Difference]: With dead ends: 181 [2023-02-14 10:48:54,580 INFO L226 Difference]: Without dead ends: 69 [2023-02-14 10:48:54,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 10:48:54,585 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 45 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:54,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 212 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:48:54,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-14 10:48:54,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-14 10:48:54,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 62 states have (on average 1.4838709677419355) internal successors, (92), 62 states have internal predecessors, (92), 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) [2023-02-14 10:48:54,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 101 transitions. [2023-02-14 10:48:54,628 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 101 transitions. Word has length 42 [2023-02-14 10:48:54,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:54,630 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 101 transitions. [2023-02-14 10:48:54,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) 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) [2023-02-14 10:48:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 101 transitions. [2023-02-14 10:48:54,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 10:48:54,634 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:54,634 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] [2023-02-14 10:48:54,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 10:48:54,635 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:54,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:54,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1001939418, now seen corresponding path program 1 times [2023-02-14 10:48:54,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:54,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219048236] [2023-02-14 10:48:54,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:54,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:54,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:48:54,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 10:48:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,804 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:48:54,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:54,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219048236] [2023-02-14 10:48:54,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219048236] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:48:54,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:48:54,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 10:48:54,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861736283] [2023-02-14 10:48:54,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:48:54,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:48:54,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:54,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:48:54,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 10:48:54,810 INFO L87 Difference]: Start difference. First operand 69 states and 101 transitions. Second operand has 4 states, 4 states have (on average 5.75) 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) [2023-02-14 10:48:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:54,837 INFO L93 Difference]: Finished difference Result 108 states and 158 transitions. [2023-02-14 10:48:54,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:48:54,838 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) 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 [2023-02-14 10:48:54,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:54,840 INFO L225 Difference]: With dead ends: 108 [2023-02-14 10:48:54,840 INFO L226 Difference]: Without dead ends: 69 [2023-02-14 10:48:54,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 10:48:54,842 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 88 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:54,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 295 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:48:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-14 10:48:54,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-14 10:48:54,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 62 states have (on average 1.467741935483871) internal successors, (91), 62 states have internal predecessors, (91), 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) [2023-02-14 10:48:54,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 100 transitions. [2023-02-14 10:48:54,852 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 100 transitions. Word has length 44 [2023-02-14 10:48:54,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:54,852 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 100 transitions. [2023-02-14 10:48:54,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) 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) [2023-02-14 10:48:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 100 transitions. [2023-02-14 10:48:54,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-14 10:48:54,854 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:54,854 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] [2023-02-14 10:48:54,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 10:48:54,854 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:54,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:54,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1588745432, now seen corresponding path program 1 times [2023-02-14 10:48:54,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:54,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779422541] [2023-02-14 10:48:54,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:54,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:54,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 10:48:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 10:48:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:54,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:54,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:54,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779422541] [2023-02-14 10:48:54,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779422541] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:54,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824998275] [2023-02-14 10:48:54,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:54,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:54,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:55,024 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:48:55,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 10:48:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:55,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 10:48:55,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:55,269 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 10:48:55,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:48:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 10:48:55,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824998275] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:48:55,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:48:55,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9, 7] total 15 [2023-02-14 10:48:55,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344523501] [2023-02-14 10:48:55,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:48:55,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 10:48:55,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 10:48:55,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-02-14 10:48:55,437 INFO L87 Difference]: Start difference. First operand 69 states and 100 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 10:48:55,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:55,706 INFO L93 Difference]: Finished difference Result 206 states and 313 transitions. [2023-02-14 10:48:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 10:48:55,706 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) Word has length 44 [2023-02-14 10:48:55,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:55,712 INFO L225 Difference]: With dead ends: 206 [2023-02-14 10:48:55,712 INFO L226 Difference]: Without dead ends: 140 [2023-02-14 10:48:55,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2023-02-14 10:48:55,718 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 234 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:55,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 744 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:48:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-14 10:48:55,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 123. [2023-02-14 10:48:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 112 states have (on average 1.4464285714285714) internal successors, (162), 113 states have internal predecessors, (162), 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) [2023-02-14 10:48:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 183 transitions. [2023-02-14 10:48:55,737 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 183 transitions. Word has length 44 [2023-02-14 10:48:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:55,737 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 183 transitions. [2023-02-14 10:48:55,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 4 states have call successors, (8), 2 states have call predecessors, (8), 5 states have return successors, (10), 6 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 10:48:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 183 transitions. [2023-02-14 10:48:55,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 10:48:55,738 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:55,738 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] [2023-02-14 10:48:55,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 10:48:55,943 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 [2023-02-14 10:48:55,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:55,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:55,944 INFO L85 PathProgramCache]: Analyzing trace with hash -565986950, now seen corresponding path program 1 times [2023-02-14 10:48:55,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:55,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984283222] [2023-02-14 10:48:55,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:55,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:55,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-14 10:48:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-14 10:48:56,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:56,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:56,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984283222] [2023-02-14 10:48:56,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984283222] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:56,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080909360] [2023-02-14 10:48:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:56,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:56,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:56,037 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:48:56,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 10:48:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 10:48:56,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:48:56,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:48:56,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080909360] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:48:56,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:48:56,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2023-02-14 10:48:56,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248472587] [2023-02-14 10:48:56,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:48:56,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:48:56,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:56,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:48:56,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-14 10:48:56,133 INFO L87 Difference]: Start difference. First operand 123 states and 183 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) [2023-02-14 10:48:56,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:56,175 INFO L93 Difference]: Finished difference Result 248 states and 371 transitions. [2023-02-14 10:48:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:48:56,176 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 [2023-02-14 10:48:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:56,177 INFO L225 Difference]: With dead ends: 248 [2023-02-14 10:48:56,177 INFO L226 Difference]: Without dead ends: 132 [2023-02-14 10:48:56,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:48:56,178 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 20 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:56,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 255 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:48:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-14 10:48:56,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2023-02-14 10:48:56,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 116 states have (on average 1.4396551724137931) internal successors, (167), 118 states have internal predecessors, (167), 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) [2023-02-14 10:48:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 191 transitions. [2023-02-14 10:48:56,186 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 191 transitions. Word has length 49 [2023-02-14 10:48:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:56,186 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 191 transitions. [2023-02-14 10:48:56,186 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) [2023-02-14 10:48:56,186 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 191 transitions. [2023-02-14 10:48:56,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 10:48:56,188 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:56,188 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] [2023-02-14 10:48:56,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 10:48:56,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-14 10:48:56,393 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:56,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:56,394 INFO L85 PathProgramCache]: Analyzing trace with hash 575914592, now seen corresponding path program 1 times [2023-02-14 10:48:56,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:56,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542261813] [2023-02-14 10:48:56,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:56,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:56,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-02-14 10:48:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-14 10:48:56,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,461 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:56,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:56,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542261813] [2023-02-14 10:48:56,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542261813] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:56,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581194774] [2023-02-14 10:48:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:56,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:56,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:56,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:48:56,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 10:48:56,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:56,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 10:48:56,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 10:48:56,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:48:56,636 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:56,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581194774] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:48:56,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:48:56,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-02-14 10:48:56,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046441637] [2023-02-14 10:48:56,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:48:56,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 10:48:56,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:56,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 10:48:56,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-14 10:48:56,639 INFO L87 Difference]: Start difference. First operand 128 states and 191 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 10:48:56,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:56,760 INFO L93 Difference]: Finished difference Result 322 states and 498 transitions. [2023-02-14 10:48:56,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 10:48:56,760 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 52 [2023-02-14 10:48:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:56,762 INFO L225 Difference]: With dead ends: 322 [2023-02-14 10:48:56,762 INFO L226 Difference]: Without dead ends: 201 [2023-02-14 10:48:56,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-02-14 10:48:56,763 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 103 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:56,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 589 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:48:56,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-02-14 10:48:56,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 142. [2023-02-14 10:48:56,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.4692307692307693) internal successors, (191), 132 states have internal predecessors, (191), 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) [2023-02-14 10:48:56,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 215 transitions. [2023-02-14 10:48:56,774 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 215 transitions. Word has length 52 [2023-02-14 10:48:56,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:56,774 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 215 transitions. [2023-02-14 10:48:56,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 2 states have call successors, (7), 2 states have call predecessors, (7), 5 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 10:48:56,774 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 215 transitions. [2023-02-14 10:48:56,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 10:48:56,775 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:56,776 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] [2023-02-14 10:48:56,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 10:48:56,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:56,980 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:56,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:56,981 INFO L85 PathProgramCache]: Analyzing trace with hash -626586992, now seen corresponding path program 1 times [2023-02-14 10:48:56,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:56,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706624965] [2023-02-14 10:48:56,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:56,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:56,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 10:48:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 10:48:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:57,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:57,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706624965] [2023-02-14 10:48:57,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706624965] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:57,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47126104] [2023-02-14 10:48:57,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:57,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:57,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:57,074 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:48:57,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 10:48:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-14 10:48:57,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:57,153 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:57,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:48:57,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:48:57,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47126104] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:57,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:48:57,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 7] total 13 [2023-02-14 10:48:57,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055599998] [2023-02-14 10:48:57,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:48:57,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 10:48:57,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:57,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 10:48:57,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-14 10:48:57,206 INFO L87 Difference]: Start difference. First operand 142 states and 215 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2023-02-14 10:48:57,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:57,243 INFO L93 Difference]: Finished difference Result 159 states and 233 transitions. [2023-02-14 10:48:57,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 10:48:57,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 54 [2023-02-14 10:48:57,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:57,244 INFO L225 Difference]: With dead ends: 159 [2023-02-14 10:48:57,244 INFO L226 Difference]: Without dead ends: 153 [2023-02-14 10:48:57,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-02-14 10:48:57,245 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 16 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 377 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 [2023-02-14 10:48:57,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 377 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:48:57,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-14 10:48:57,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2023-02-14 10:48:57,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 139 states have (on average 1.4460431654676258) internal successors, (201), 141 states have internal predecessors, (201), 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) [2023-02-14 10:48:57,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 225 transitions. [2023-02-14 10:48:57,253 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 225 transitions. Word has length 54 [2023-02-14 10:48:57,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:57,253 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 225 transitions. [2023-02-14 10:48:57,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2023-02-14 10:48:57,253 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 225 transitions. [2023-02-14 10:48:57,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 10:48:57,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:57,254 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] [2023-02-14 10:48:57,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 10:48:57,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:57,460 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:57,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash -569328690, now seen corresponding path program 1 times [2023-02-14 10:48:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:57,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191631097] [2023-02-14 10:48:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:57,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:57,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:57,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 10:48:57,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-14 10:48:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,529 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:48:57,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:57,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191631097] [2023-02-14 10:48:57,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191631097] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:48:57,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:48:57,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 10:48:57,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033404417] [2023-02-14 10:48:57,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:48:57,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 10:48:57,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:57,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 10:48:57,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 10:48:57,531 INFO L87 Difference]: Start difference. First operand 151 states and 225 transitions. Second operand has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2023-02-14 10:48:57,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:57,553 INFO L93 Difference]: Finished difference Result 157 states and 230 transitions. [2023-02-14 10:48:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 10:48:57,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 54 [2023-02-14 10:48:57,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:57,554 INFO L225 Difference]: With dead ends: 157 [2023-02-14 10:48:57,554 INFO L226 Difference]: Without dead ends: 146 [2023-02-14 10:48:57,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 10:48:57,555 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 2 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:57,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 480 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:48:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-14 10:48:57,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2023-02-14 10:48:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 134 states have (on average 1.4328358208955223) internal successors, (192), 136 states have internal predecessors, (192), 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) [2023-02-14 10:48:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 216 transitions. [2023-02-14 10:48:57,561 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 216 transitions. Word has length 54 [2023-02-14 10:48:57,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:57,562 INFO L495 AbstractCegarLoop]: Abstraction has 146 states and 216 transitions. [2023-02-14 10:48:57,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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) [2023-02-14 10:48:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 216 transitions. [2023-02-14 10:48:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 10:48:57,562 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:57,563 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] [2023-02-14 10:48:57,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-14 10:48:57,563 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:57,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:57,563 INFO L85 PathProgramCache]: Analyzing trace with hash -780967015, now seen corresponding path program 1 times [2023-02-14 10:48:57,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:57,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301284521] [2023-02-14 10:48:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:57,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:57,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 10:48:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 10:48:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:57,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:57,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301284521] [2023-02-14 10:48:57,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301284521] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:57,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931064693] [2023-02-14 10:48:57,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:57,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:57,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:57,645 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:48:57,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 10:48:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:57,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-14 10:48:57,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 10:48:57,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:48:57,832 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-02-14 10:48:57,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931064693] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:57,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:48:57,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 8] total 15 [2023-02-14 10:48:57,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728199172] [2023-02-14 10:48:57,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:48:57,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 10:48:57,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:57,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 10:48:57,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-02-14 10:48:57,834 INFO L87 Difference]: Start difference. First operand 146 states and 216 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2023-02-14 10:48:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:57,911 INFO L93 Difference]: Finished difference Result 217 states and 313 transitions. [2023-02-14 10:48:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 10:48:57,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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 [2023-02-14 10:48:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:57,912 INFO L225 Difference]: With dead ends: 217 [2023-02-14 10:48:57,913 INFO L226 Difference]: Without dead ends: 208 [2023-02-14 10:48:57,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-02-14 10:48:57,913 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 307 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:57,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 252 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:48:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2023-02-14 10:48:57,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 147. [2023-02-14 10:48:57,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 135 states have (on average 1.4296296296296296) internal successors, (193), 137 states have internal predecessors, (193), 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) [2023-02-14 10:48:57,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 217 transitions. [2023-02-14 10:48:57,920 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 217 transitions. Word has length 56 [2023-02-14 10:48:57,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:57,920 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 217 transitions. [2023-02-14 10:48:57,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 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) [2023-02-14 10:48:57,921 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 217 transitions. [2023-02-14 10:48:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 10:48:57,921 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:57,921 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] [2023-02-14 10:48:57,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 10:48:58,126 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 [2023-02-14 10:48:58,126 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:58,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:58,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1173994025, now seen corresponding path program 1 times [2023-02-14 10:48:58,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:58,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613179051] [2023-02-14 10:48:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:58,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:58,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 10:48:58,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2023-02-14 10:48:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:58,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:58,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613179051] [2023-02-14 10:48:58,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613179051] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:58,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293641306] [2023-02-14 10:48:58,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:58,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:58,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:58,207 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:48:58,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 10:48:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 10:48:58,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-14 10:48:58,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:48:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 10:48:58,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293641306] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:48:58,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:48:58,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 14 [2023-02-14 10:48:58,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416182501] [2023-02-14 10:48:58,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:48:58,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 10:48:58,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:58,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 10:48:58,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-14 10:48:58,406 INFO L87 Difference]: Start difference. First operand 147 states and 217 transitions. Second operand has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 12 states have internal predecessors, (83), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-14 10:48:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:58,696 INFO L93 Difference]: Finished difference Result 318 states and 475 transitions. [2023-02-14 10:48:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 10:48:58,696 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 12 states have internal predecessors, (83), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 56 [2023-02-14 10:48:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:58,697 INFO L225 Difference]: With dead ends: 318 [2023-02-14 10:48:58,697 INFO L226 Difference]: Without dead ends: 173 [2023-02-14 10:48:58,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2023-02-14 10:48:58,698 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 259 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:58,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 629 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:48:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-14 10:48:58,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 101. [2023-02-14 10:48:58,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.434782608695652) internal successors, (132), 92 states have internal predecessors, (132), 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) [2023-02-14 10:48:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 145 transitions. [2023-02-14 10:48:58,706 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 145 transitions. Word has length 56 [2023-02-14 10:48:58,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:58,706 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 145 transitions. [2023-02-14 10:48:58,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.928571428571429) internal successors, (83), 12 states have internal predecessors, (83), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-14 10:48:58,706 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 145 transitions. [2023-02-14 10:48:58,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-02-14 10:48:58,707 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:58,707 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] [2023-02-14 10:48:58,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 10:48:58,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:58,912 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:58,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1149225424, now seen corresponding path program 1 times [2023-02-14 10:48:58,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:58,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102204885] [2023-02-14 10:48:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:58,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:58,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:58,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 10:48:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-14 10:48:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,033 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:48:59,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:59,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102204885] [2023-02-14 10:48:59,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102204885] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:59,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649560119] [2023-02-14 10:48:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:59,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:59,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:59,036 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:48:59,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 10:48:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 10:48:59,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 10:48:59,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:48:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-02-14 10:48:59,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649560119] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:59,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:48:59,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 5] total 10 [2023-02-14 10:48:59,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118517054] [2023-02-14 10:48:59,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:48:59,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 10:48:59,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:59,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 10:48:59,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-14 10:48:59,160 INFO L87 Difference]: Start difference. First operand 101 states and 145 transitions. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-02-14 10:48:59,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:59,170 INFO L93 Difference]: Finished difference Result 128 states and 180 transitions. [2023-02-14 10:48:59,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 10:48:59,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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 66 [2023-02-14 10:48:59,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:59,171 INFO L225 Difference]: With dead ends: 128 [2023-02-14 10:48:59,171 INFO L226 Difference]: Without dead ends: 101 [2023-02-14 10:48:59,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-14 10:48:59,172 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 39 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:59,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 139 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:48:59,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-14 10:48:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-14 10:48:59,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.423913043478261) internal successors, (131), 92 states have internal predecessors, (131), 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) [2023-02-14 10:48:59,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 144 transitions. [2023-02-14 10:48:59,178 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 144 transitions. Word has length 66 [2023-02-14 10:48:59,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:59,178 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 144 transitions. [2023-02-14 10:48:59,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 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) [2023-02-14 10:48:59,179 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 144 transitions. [2023-02-14 10:48:59,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-14 10:48:59,179 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:59,179 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] [2023-02-14 10:48:59,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 10:48:59,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:59,384 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:48:59,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:48:59,384 INFO L85 PathProgramCache]: Analyzing trace with hash 526310599, now seen corresponding path program 1 times [2023-02-14 10:48:59,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:48:59,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164271754] [2023-02-14 10:48:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:59,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:48:59,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:48:59,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:48:59,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 10:48:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-14 10:48:59,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 10:48:59,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:48:59,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164271754] [2023-02-14 10:48:59,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164271754] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:48:59,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259073569] [2023-02-14 10:48:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:48:59,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:48:59,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:48:59,491 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:48:59,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 10:48:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:48:59,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 10:48:59,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:48:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 10:48:59,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:48:59,706 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 10:48:59,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259073569] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:48:59,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:48:59,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-02-14 10:48:59,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15914085] [2023-02-14 10:48:59,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:48:59,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 10:48:59,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:48:59,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 10:48:59,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-02-14 10:48:59,709 INFO L87 Difference]: Start difference. First operand 101 states and 144 transitions. Second operand has 20 states, 20 states have (on average 4.1) internal successors, (82), 17 states have internal predecessors, (82), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-14 10:48:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:48:59,832 INFO L93 Difference]: Finished difference Result 211 states and 298 transitions. [2023-02-14 10:48:59,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 10:48:59,833 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 17 states have internal predecessors, (82), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 67 [2023-02-14 10:48:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:48:59,834 INFO L225 Difference]: With dead ends: 211 [2023-02-14 10:48:59,834 INFO L226 Difference]: Without dead ends: 175 [2023-02-14 10:48:59,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-02-14 10:48:59,835 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 335 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:48:59,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 1106 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:48:59,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-02-14 10:48:59,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 117. [2023-02-14 10:48:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.3714285714285714) internal successors, (144), 106 states have internal predecessors, (144), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-14 10:48:59,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 168 transitions. [2023-02-14 10:48:59,842 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 168 transitions. Word has length 67 [2023-02-14 10:48:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:48:59,842 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 168 transitions. [2023-02-14 10:48:59,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.1) internal successors, (82), 17 states have internal predecessors, (82), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2023-02-14 10:48:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 168 transitions. [2023-02-14 10:48:59,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-14 10:48:59,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:48:59,842 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] [2023-02-14 10:48:59,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 10:49:00,048 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,SelfDestructingSolverStorable10 [2023-02-14 10:49:00,048 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:00,049 INFO L85 PathProgramCache]: Analyzing trace with hash 745165317, now seen corresponding path program 1 times [2023-02-14 10:49:00,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:00,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343111941] [2023-02-14 10:49:00,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:00,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 10:49:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-14 10:49:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-14 10:49:00,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:00,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343111941] [2023-02-14 10:49:00,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343111941] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:49:00,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:49:00,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 10:49:00,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458744740] [2023-02-14 10:49:00,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:49:00,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 10:49:00,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:00,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 10:49:00,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:49:00,119 INFO L87 Difference]: Start difference. First operand 117 states and 168 transitions. Second operand has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 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) [2023-02-14 10:49:00,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:00,165 INFO L93 Difference]: Finished difference Result 168 states and 232 transitions. [2023-02-14 10:49:00,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 10:49:00,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 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 67 [2023-02-14 10:49:00,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:00,167 INFO L225 Difference]: With dead ends: 168 [2023-02-14 10:49:00,167 INFO L226 Difference]: Without dead ends: 117 [2023-02-14 10:49:00,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-14 10:49:00,168 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 4 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:00,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 536 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:49:00,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-14 10:49:00,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-02-14 10:49:00,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.3714285714285714) internal successors, (144), 106 states have internal predecessors, (144), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 10:49:00,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 162 transitions. [2023-02-14 10:49:00,197 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 162 transitions. Word has length 67 [2023-02-14 10:49:00,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:00,198 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 162 transitions. [2023-02-14 10:49:00,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.857142857142857) internal successors, (48), 6 states have internal predecessors, (48), 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) [2023-02-14 10:49:00,198 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 162 transitions. [2023-02-14 10:49:00,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 10:49:00,198 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:00,198 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] [2023-02-14 10:49:00,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-02-14 10:49:00,199 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:00,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:00,199 INFO L85 PathProgramCache]: Analyzing trace with hash -932642122, now seen corresponding path program 1 times [2023-02-14 10:49:00,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:00,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972171210] [2023-02-14 10:49:00,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:00,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:00,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 10:49:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-14 10:49:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,273 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-14 10:49:00,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:00,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972171210] [2023-02-14 10:49:00,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972171210] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:49:00,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:49:00,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 10:49:00,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989354403] [2023-02-14 10:49:00,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:49:00,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 10:49:00,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:00,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 10:49:00,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:49:00,274 INFO L87 Difference]: Start difference. First operand 117 states and 162 transitions. Second operand has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 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) [2023-02-14 10:49:00,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:00,322 INFO L93 Difference]: Finished difference Result 225 states and 307 transitions. [2023-02-14 10:49:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 10:49:00,323 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 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 71 [2023-02-14 10:49:00,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:00,324 INFO L225 Difference]: With dead ends: 225 [2023-02-14 10:49:00,324 INFO L226 Difference]: Without dead ends: 198 [2023-02-14 10:49:00,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-14 10:49:00,325 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 126 mSDsluCounter, 485 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:00,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 578 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:49:00,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-02-14 10:49:00,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 143. [2023-02-14 10:49:00,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 130 states have (on average 1.3307692307692307) internal successors, (173), 130 states have internal predecessors, (173), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2023-02-14 10:49:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 194 transitions. [2023-02-14 10:49:00,337 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 194 transitions. Word has length 71 [2023-02-14 10:49:00,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:00,338 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 194 transitions. [2023-02-14 10:49:00,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.285714285714286) internal successors, (51), 6 states have internal predecessors, (51), 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) [2023-02-14 10:49:00,338 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 194 transitions. [2023-02-14 10:49:00,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 10:49:00,339 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:00,339 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] [2023-02-14 10:49:00,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-14 10:49:00,339 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:00,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:00,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2082461496, now seen corresponding path program 1 times [2023-02-14 10:49:00,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:00,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274126365] [2023-02-14 10:49:00,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:00,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 10:49:00,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-02-14 10:49:00,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 10:49:00,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:00,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274126365] [2023-02-14 10:49:00,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274126365] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:00,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761822801] [2023-02-14 10:49:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:00,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:00,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:49:00,478 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:49:00,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 10:49:00,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 10:49:00,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:49:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 10:49:00,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:49:00,635 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-14 10:49:00,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761822801] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:00,635 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 10:49:00,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 12 [2023-02-14 10:49:00,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477748917] [2023-02-14 10:49:00,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:49:00,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:49:00,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:00,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:49:00,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-14 10:49:00,636 INFO L87 Difference]: Start difference. First operand 143 states and 194 transitions. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2023-02-14 10:49:00,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:00,653 INFO L93 Difference]: Finished difference Result 183 states and 245 transitions. [2023-02-14 10:49:00,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:49:00,654 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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 71 [2023-02-14 10:49:00,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:00,655 INFO L225 Difference]: With dead ends: 183 [2023-02-14 10:49:00,655 INFO L226 Difference]: Without dead ends: 123 [2023-02-14 10:49:00,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2023-02-14 10:49:00,656 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 42 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:00,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 186 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:49:00,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-14 10:49:00,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2023-02-14 10:49:00,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 111 states have (on average 1.3333333333333333) internal successors, (148), 112 states have internal predecessors, (148), 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) [2023-02-14 10:49:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 162 transitions. [2023-02-14 10:49:00,667 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 162 transitions. Word has length 71 [2023-02-14 10:49:00,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:00,667 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 162 transitions. [2023-02-14 10:49:00,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2023-02-14 10:49:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 162 transitions. [2023-02-14 10:49:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 10:49:00,668 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:00,668 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] [2023-02-14 10:49:00,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 10:49:00,873 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,SelfDestructingSolverStorable13 [2023-02-14 10:49:00,873 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:00,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:00,873 INFO L85 PathProgramCache]: Analyzing trace with hash -2106891108, now seen corresponding path program 1 times [2023-02-14 10:49:00,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:00,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129914545] [2023-02-14 10:49:00,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:00,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:00,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 10:49:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-14 10:49:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:49:00,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:00,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129914545] [2023-02-14 10:49:00,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129914545] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:49:00,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:49:00,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 10:49:00,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891191018] [2023-02-14 10:49:00,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:49:00,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 10:49:00,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:00,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 10:49:00,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-02-14 10:49:00,987 INFO L87 Difference]: Start difference. First operand 122 states and 162 transitions. Second operand has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 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) [2023-02-14 10:49:01,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:01,058 INFO L93 Difference]: Finished difference Result 210 states and 281 transitions. [2023-02-14 10:49:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 10:49:01,058 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 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 [2023-02-14 10:49:01,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:01,060 INFO L225 Difference]: With dead ends: 210 [2023-02-14 10:49:01,060 INFO L226 Difference]: Without dead ends: 177 [2023-02-14 10:49:01,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-02-14 10:49:01,062 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 172 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:01,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 753 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:49:01,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-14 10:49:01,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 125. [2023-02-14 10:49:01,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 114 states have (on average 1.3245614035087718) internal successors, (151), 115 states have internal predecessors, (151), 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) [2023-02-14 10:49:01,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 165 transitions. [2023-02-14 10:49:01,070 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 165 transitions. Word has length 76 [2023-02-14 10:49:01,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:01,070 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 165 transitions. [2023-02-14 10:49:01,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.625) internal successors, (53), 7 states have internal predecessors, (53), 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) [2023-02-14 10:49:01,070 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 165 transitions. [2023-02-14 10:49:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 10:49:01,071 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:01,071 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] [2023-02-14 10:49:01,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-02-14 10:49:01,072 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:01,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1370427738, now seen corresponding path program 1 times [2023-02-14 10:49:01,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:01,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296344501] [2023-02-14 10:49:01,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:01,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 10:49:01,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-14 10:49:01,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,197 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:49:01,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:01,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296344501] [2023-02-14 10:49:01,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296344501] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:01,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425176407] [2023-02-14 10:49:01,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:01,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:01,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:49:01,219 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:49:01,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 10:49:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 10:49:01,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:49:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:49:01,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:49:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:49:01,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425176407] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:49:01,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:49:01,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-02-14 10:49:01,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919002359] [2023-02-14 10:49:01,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:49:01,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 10:49:01,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 10:49:01,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-02-14 10:49:01,396 INFO L87 Difference]: Start difference. First operand 125 states and 165 transitions. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 12 states have internal predecessors, (71), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 10:49:01,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:01,488 INFO L93 Difference]: Finished difference Result 254 states and 336 transitions. [2023-02-14 10:49:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 10:49:01,489 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 12 states have internal predecessors, (71), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 76 [2023-02-14 10:49:01,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:01,489 INFO L225 Difference]: With dead ends: 254 [2023-02-14 10:49:01,489 INFO L226 Difference]: Without dead ends: 215 [2023-02-14 10:49:01,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2023-02-14 10:49:01,490 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 297 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:01,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 1081 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:49:01,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-02-14 10:49:01,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 142. [2023-02-14 10:49:01,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.3) internal successors, (169), 129 states have internal predecessors, (169), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 10:49:01,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 187 transitions. [2023-02-14 10:49:01,498 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 187 transitions. Word has length 76 [2023-02-14 10:49:01,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:01,498 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 187 transitions. [2023-02-14 10:49:01,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 12 states have internal predecessors, (71), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-14 10:49:01,498 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 187 transitions. [2023-02-14 10:49:01,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 10:49:01,498 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:01,499 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] [2023-02-14 10:49:01,519 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 10:49:01,703 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 [2023-02-14 10:49:01,703 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:01,704 INFO L85 PathProgramCache]: Analyzing trace with hash 90564060, now seen corresponding path program 1 times [2023-02-14 10:49:01,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:01,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013220113] [2023-02-14 10:49:01,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:01,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:01,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 10:49:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-14 10:49:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,835 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 10:49:01,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:01,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013220113] [2023-02-14 10:49:01,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013220113] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:01,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823787556] [2023-02-14 10:49:01,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:01,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:01,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:49:01,849 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:49:01,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 10:49:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:01,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-14 10:49:01,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:49:01,997 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 10:49:01,998 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:49:01,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823787556] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:49:01,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:49:01,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6] total 13 [2023-02-14 10:49:01,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213776405] [2023-02-14 10:49:01,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:49:01,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 10:49:01,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:01,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 10:49:01,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-14 10:49:01,999 INFO L87 Difference]: Start difference. First operand 142 states and 187 transitions. Second operand has 9 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 10:49:02,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:02,107 INFO L93 Difference]: Finished difference Result 248 states and 325 transitions. [2023-02-14 10:49:02,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 10:49:02,108 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 76 [2023-02-14 10:49:02,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:02,109 INFO L225 Difference]: With dead ends: 248 [2023-02-14 10:49:02,109 INFO L226 Difference]: Without dead ends: 212 [2023-02-14 10:49:02,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-02-14 10:49:02,109 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 137 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:02,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 753 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:49:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-02-14 10:49:02,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 142. [2023-02-14 10:49:02,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 130 states have (on average 1.2923076923076924) internal successors, (168), 129 states have internal predecessors, (168), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (12), 8 states have call predecessors, (12), 5 states have call successors, (12) [2023-02-14 10:49:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2023-02-14 10:49:02,116 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 76 [2023-02-14 10:49:02,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:02,116 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2023-02-14 10:49:02,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.5) internal successors, (52), 7 states have internal predecessors, (52), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-14 10:49:02,116 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2023-02-14 10:49:02,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 10:49:02,117 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:02,117 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] [2023-02-14 10:49:02,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 10:49:02,322 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 [2023-02-14 10:49:02,322 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:02,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1714874274, now seen corresponding path program 1 times [2023-02-14 10:49:02,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:02,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099606599] [2023-02-14 10:49:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:02,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:02,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:02,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:02,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 10:49:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:02,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-02-14 10:49:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 10:49:02,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:02,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099606599] [2023-02-14 10:49:02,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099606599] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:02,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846809277] [2023-02-14 10:49:02,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:02,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:02,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:49:02,428 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:49:02,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 10:49:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:02,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-14 10:49:02,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:49:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:49:02,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:49:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-14 10:49:02,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846809277] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:49:02,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:49:02,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10, 10] total 21 [2023-02-14 10:49:02,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44654025] [2023-02-14 10:49:02,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:49:02,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 10:49:02,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:02,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 10:49:02,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2023-02-14 10:49:02,721 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 19 states have internal predecessors, (106), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-14 10:49:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:03,044 INFO L93 Difference]: Finished difference Result 341 states and 454 transitions. [2023-02-14 10:49:03,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-14 10:49:03,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 19 states have internal predecessors, (106), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) Word has length 76 [2023-02-14 10:49:03,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:03,045 INFO L225 Difference]: With dead ends: 341 [2023-02-14 10:49:03,045 INFO L226 Difference]: Without dead ends: 147 [2023-02-14 10:49:03,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-02-14 10:49:03,046 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 154 mSDsluCounter, 1023 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:03,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 1097 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 10:49:03,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-14 10:49:03,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 125. [2023-02-14 10:49:03,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 114 states have (on average 1.3245614035087718) internal successors, (151), 115 states have internal predecessors, (151), 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) [2023-02-14 10:49:03,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 164 transitions. [2023-02-14 10:49:03,053 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 164 transitions. Word has length 76 [2023-02-14 10:49:03,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:03,053 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 164 transitions. [2023-02-14 10:49:03,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 19 states have internal predecessors, (106), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (9), 6 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-14 10:49:03,053 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 164 transitions. [2023-02-14 10:49:03,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-14 10:49:03,054 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:03,054 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2023-02-14 10:49:03,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 10:49:03,258 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 [2023-02-14 10:49:03,258 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:03,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:03,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2040999085, now seen corresponding path program 1 times [2023-02-14 10:49:03,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:03,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239555731] [2023-02-14 10:49:03,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:03,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:03,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:03,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-14 10:49:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-14 10:49:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-02-14 10:49:03,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:03,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239555731] [2023-02-14 10:49:03,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239555731] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:03,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852641667] [2023-02-14 10:49:03,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:03,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:03,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:49:03,408 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:49:03,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 10:49:03,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 10:49:03,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:49:03,491 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-14 10:49:03,492 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 10:49:03,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852641667] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:49:03,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 10:49:03,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-14 10:49:03,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59380781] [2023-02-14 10:49:03,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:49:03,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 10:49:03,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:03,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 10:49:03,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-14 10:49:03,494 INFO L87 Difference]: Start difference. First operand 125 states and 164 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2023-02-14 10:49:03,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:03,511 INFO L93 Difference]: Finished difference Result 153 states and 200 transitions. [2023-02-14 10:49:03,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 10:49:03,511 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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 82 [2023-02-14 10:49:03,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:03,512 INFO L225 Difference]: With dead ends: 153 [2023-02-14 10:49:03,512 INFO L226 Difference]: Without dead ends: 129 [2023-02-14 10:49:03,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-14 10:49:03,513 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 2 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:03,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 268 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:49:03,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-14 10:49:03,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2023-02-14 10:49:03,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 116 states have (on average 1.3189655172413792) internal successors, (153), 117 states have internal predecessors, (153), 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) [2023-02-14 10:49:03,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 166 transitions. [2023-02-14 10:49:03,520 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 166 transitions. Word has length 82 [2023-02-14 10:49:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:03,520 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 166 transitions. [2023-02-14 10:49:03,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 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) [2023-02-14 10:49:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 166 transitions. [2023-02-14 10:49:03,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-14 10:49:03,521 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:49:03,521 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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] [2023-02-14 10:49:03,543 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-14 10:49:03,726 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 [2023-02-14 10:49:03,726 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:49:03,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:49:03,727 INFO L85 PathProgramCache]: Analyzing trace with hash 974104533, now seen corresponding path program 1 times [2023-02-14 10:49:03,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:49:03,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597250419] [2023-02-14 10:49:03,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:03,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:49:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 10:49:03,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 10:49:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-02-14 10:49:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-14 10:49:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:03,876 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-14 10:49:03,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:49:03,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597250419] [2023-02-14 10:49:03,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597250419] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:49:03,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132464246] [2023-02-14 10:49:03,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:49:03,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:49:03,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:49:03,894 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 10:49:03,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 10:49:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:49:04,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-14 10:49:04,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:49:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 10:49:04,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:49:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-02-14 10:49:04,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132464246] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:49:04,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:49:04,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 20 [2023-02-14 10:49:04,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602095467] [2023-02-14 10:49:04,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:49:04,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 10:49:04,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:49:04,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 10:49:04,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-02-14 10:49:04,246 INFO L87 Difference]: Start difference. First operand 127 states and 166 transitions. Second operand has 20 states, 20 states have (on average 4.6) internal successors, (92), 18 states have internal predecessors, (92), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-14 10:49:04,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:49:04,662 INFO L93 Difference]: Finished difference Result 212 states and 280 transitions. [2023-02-14 10:49:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-14 10:49:04,662 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.6) internal successors, (92), 18 states have internal predecessors, (92), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) Word has length 82 [2023-02-14 10:49:04,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:49:04,662 INFO L225 Difference]: With dead ends: 212 [2023-02-14 10:49:04,662 INFO L226 Difference]: Without dead ends: 0 [2023-02-14 10:49:04,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2023-02-14 10:49:04,663 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 199 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 10:49:04,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 272 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 10:49:04,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-14 10:49:04,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-14 10:49:04,664 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) [2023-02-14 10:49:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-14 10:49:04,664 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2023-02-14 10:49:04,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:49:04,664 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-14 10:49:04,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.6) internal successors, (92), 18 states have internal predecessors, (92), 4 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (12), 6 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-14 10:49:04,664 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-14 10:49:04,664 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-14 10:49:04,666 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-14 10:49:04,691 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-14 10:49:04,874 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 [2023-02-14 10:49:04,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-14 10:49:09,374 INFO L899 garLoopResultBuilder]: For program point L77(line 77) no Hoare annotation was computed. [2023-02-14 10:49:09,375 INFO L899 garLoopResultBuilder]: For program point L77-2(line 77) no Hoare annotation was computed. [2023-02-14 10:49:09,375 INFO L899 garLoopResultBuilder]: For program point L77-4(line 77) no Hoare annotation was computed. [2023-02-14 10:49:09,375 INFO L895 garLoopResultBuilder]: At program point L57-2(lines 57 72) the Hoare annotation is: (and (<= |base2flt_#in~e| base2flt_~e) (not (<= (mod |base2flt_#in~m| 4294967296) 0)) (not (= |base2flt_#in~m| 1))) [2023-02-14 10:49:09,375 INFO L895 garLoopResultBuilder]: At program point $Ultimate##27(line 76) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2023-02-14 10:49:09,375 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 34) no Hoare annotation was computed. [2023-02-14 10:49:09,375 INFO L899 garLoopResultBuilder]: For program point L58(lines 57 72) no Hoare annotation was computed. [2023-02-14 10:49:09,376 INFO L895 garLoopResultBuilder]: At program point L79(lines 28 81) the Hoare annotation is: (or (and (= base2flt_~m |base2flt_#in~m|) (<= |base2flt_#in~e| base2flt_~e) (or (= base2flt_~e |base2flt_#in~e|) (= base2flt_~e 0)) (= base2flt_~__retres4~0 0)) (not (<= (mod |base2flt_#in~m| 4294967296) 0))) [2023-02-14 10:49:09,376 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 24 82) the Hoare annotation is: true [2023-02-14 10:49:09,376 INFO L899 garLoopResultBuilder]: For program point L38(lines 37 52) no Hoare annotation was computed. [2023-02-14 10:49:09,376 INFO L899 garLoopResultBuilder]: For program point base2fltFINAL(lines 24 82) no Hoare annotation was computed. [2023-02-14 10:49:09,376 INFO L899 garLoopResultBuilder]: For program point L59(lines 57 72) no Hoare annotation was computed. [2023-02-14 10:49:09,376 INFO L899 garLoopResultBuilder]: For program point base2fltEXIT(lines 24 82) no Hoare annotation was computed. [2023-02-14 10:49:09,376 INFO L899 garLoopResultBuilder]: For program point L47(lines 47 51) no Hoare annotation was computed. [2023-02-14 10:49:09,377 INFO L895 garLoopResultBuilder]: At program point L47-1(lines 37 52) the Hoare annotation is: (not (<= (mod |base2flt_#in~m| 4294967296) 0)) [2023-02-14 10:49:09,377 INFO L899 garLoopResultBuilder]: For program point L76-1(line 76) no Hoare annotation was computed. [2023-02-14 10:49:09,377 INFO L899 garLoopResultBuilder]: For program point L76-3(line 76) no Hoare annotation was computed. [2023-02-14 10:49:09,377 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 75) no Hoare annotation was computed. [2023-02-14 10:49:09,377 INFO L899 garLoopResultBuilder]: For program point L176(line 176) no Hoare annotation was computed. [2023-02-14 10:49:09,377 INFO L899 garLoopResultBuilder]: For program point L176-2(line 176) no Hoare annotation was computed. [2023-02-14 10:49:09,377 INFO L899 garLoopResultBuilder]: For program point L176-4(line 176) no Hoare annotation was computed. [2023-02-14 10:49:09,377 INFO L902 garLoopResultBuilder]: At program point main_returnLabel#1(lines 220 276) the Hoare annotation is: true [2023-02-14 10:49:09,378 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-14 10:49:09,378 INFO L899 garLoopResultBuilder]: For program point L185(lines 185 190) no Hoare annotation was computed. [2023-02-14 10:49:09,378 INFO L899 garLoopResultBuilder]: For program point L243(lines 243 252) no Hoare annotation was computed. [2023-02-14 10:49:09,378 INFO L899 garLoopResultBuilder]: For program point L243-2(lines 243 252) no Hoare annotation was computed. [2023-02-14 10:49:09,378 INFO L899 garLoopResultBuilder]: For program point L260(lines 260 264) no Hoare annotation was computed. [2023-02-14 10:49:09,378 INFO L899 garLoopResultBuilder]: For program point L194(lines 194 211) no Hoare annotation was computed. [2023-02-14 10:49:09,378 INFO L899 garLoopResultBuilder]: For program point L260-2(lines 260 264) no Hoare annotation was computed. [2023-02-14 10:49:09,379 INFO L899 garLoopResultBuilder]: For program point L194-2(lines 194 211) no Hoare annotation was computed. [2023-02-14 10:49:09,379 INFO L895 garLoopResultBuilder]: At program point mulflt_returnLabel#1(lines 147 219) the Hoare annotation is: (or (<= (+ |ULTIMATE.start_main_~sa~0#1| 1) 0) (and (= |ULTIMATE.start_main_~tmp~2#1| 1) (= |ULTIMATE.start_main_~sa~0#1| 1)) (and (< (mod |ULTIMATE.start_mulflt_#res#1| 4294967296) 1) (< (mod |ULTIMATE.start_main_~zero~0#1| 4294967296) 1) (< (mod |ULTIMATE.start_mulflt_~__retres10~1#1| 4294967296) 1))) [2023-02-14 10:49:09,379 INFO L899 garLoopResultBuilder]: For program point L203(lines 203 208) no Hoare annotation was computed. [2023-02-14 10:49:09,379 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-14 10:49:09,379 INFO L899 garLoopResultBuilder]: For program point L195(lines 195 200) no Hoare annotation was computed. [2023-02-14 10:49:09,379 INFO L899 garLoopResultBuilder]: For program point L179(lines 179 184) no Hoare annotation was computed. [2023-02-14 10:49:09,380 INFO L899 garLoopResultBuilder]: For program point L171(line 171) no Hoare annotation was computed. [2023-02-14 10:49:09,380 INFO L899 garLoopResultBuilder]: For program point L171-2(line 171) no Hoare annotation was computed. [2023-02-14 10:49:09,380 INFO L899 garLoopResultBuilder]: For program point L171-4(line 171) no Hoare annotation was computed. [2023-02-14 10:49:09,380 INFO L899 garLoopResultBuilder]: For program point L246(lines 246 250) no Hoare annotation was computed. [2023-02-14 10:49:09,380 INFO L899 garLoopResultBuilder]: For program point L213(line 213) no Hoare annotation was computed. [2023-02-14 10:49:09,380 INFO L899 garLoopResultBuilder]: For program point L246-2(lines 246 250) no Hoare annotation was computed. [2023-02-14 10:49:09,380 INFO L899 garLoopResultBuilder]: For program point L213-2(line 213) no Hoare annotation was computed. [2023-02-14 10:49:09,380 INFO L899 garLoopResultBuilder]: For program point L213-4(line 213) no Hoare annotation was computed. [2023-02-14 10:49:09,381 INFO L902 garLoopResultBuilder]: At program point L238(line 238) the Hoare annotation is: true [2023-02-14 10:49:09,381 INFO L899 garLoopResultBuilder]: For program point L238-1(line 238) no Hoare annotation was computed. [2023-02-14 10:49:09,381 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-14 10:49:09,381 INFO L899 garLoopResultBuilder]: For program point L214(line 214) no Hoare annotation was computed. [2023-02-14 10:49:09,381 INFO L899 garLoopResultBuilder]: For program point L214-2(line 214) no Hoare annotation was computed. [2023-02-14 10:49:09,381 INFO L899 garLoopResultBuilder]: For program point L214-4(line 214) no Hoare annotation was computed. [2023-02-14 10:49:09,381 INFO L895 garLoopResultBuilder]: At program point L239(line 239) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2023-02-14 10:49:09,381 INFO L899 garLoopResultBuilder]: For program point L239-1(line 239) no Hoare annotation was computed. [2023-02-14 10:49:09,381 INFO L899 garLoopResultBuilder]: For program point L173(line 173) no Hoare annotation was computed. [2023-02-14 10:49:09,382 INFO L899 garLoopResultBuilder]: For program point L173-2(line 173) no Hoare annotation was computed. [2023-02-14 10:49:09,382 INFO L899 garLoopResultBuilder]: For program point L173-4(line 173) no Hoare annotation was computed. [2023-02-14 10:49:09,382 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-14 10:49:09,382 INFO L899 garLoopResultBuilder]: For program point L256(lines 256 272) no Hoare annotation was computed. [2023-02-14 10:49:09,382 INFO L899 garLoopResultBuilder]: For program point L256-1(lines 256 272) no Hoare annotation was computed. [2023-02-14 10:49:09,382 INFO L895 garLoopResultBuilder]: At program point L240(line 240) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2023-02-14 10:49:09,382 INFO L899 garLoopResultBuilder]: For program point L240-1(line 240) no Hoare annotation was computed. [2023-02-14 10:49:09,382 INFO L899 garLoopResultBuilder]: For program point L174(line 174) no Hoare annotation was computed. [2023-02-14 10:49:09,383 INFO L899 garLoopResultBuilder]: For program point L174-2(line 174) no Hoare annotation was computed. [2023-02-14 10:49:09,384 INFO L899 garLoopResultBuilder]: For program point L174-4(line 174) no Hoare annotation was computed. [2023-02-14 10:49:09,384 INFO L899 garLoopResultBuilder]: For program point L257(lines 257 266) no Hoare annotation was computed. [2023-02-14 10:49:09,384 INFO L895 garLoopResultBuilder]: At program point L257-2(lines 257 266) the Hoare annotation is: (and (= 0 |ULTIMATE.start_main_~tmp___1~0#1|) (= 0 |ULTIMATE.start_main_~tmp___0~0#1|)) [2023-02-14 10:49:09,384 INFO L899 garLoopResultBuilder]: For program point L158(lines 158 164) no Hoare annotation was computed. [2023-02-14 10:49:09,384 INFO L899 garLoopResultBuilder]: For program point L158-2(lines 157 218) no Hoare annotation was computed. [2023-02-14 10:49:09,384 INFO L895 garLoopResultBuilder]: At program point L216(lines 157 218) the Hoare annotation is: (or (<= (+ |ULTIMATE.start_main_~sa~0#1| 1) 0) (and (= |ULTIMATE.start_main_~tmp~2#1| 1) (= |ULTIMATE.start_main_~sa~0#1| 1)) (and (< (mod |ULTIMATE.start_main_~zero~0#1| 4294967296) 1) (< (mod |ULTIMATE.start_mulflt_~__retres10~1#1| 4294967296) 1))) [2023-02-14 10:49:09,384 INFO L895 garLoopResultBuilder]: At program point L241(line 241) the Hoare annotation is: (= |ULTIMATE.start_main_~zero~0#1| 0) [2023-02-14 10:49:09,385 INFO L899 garLoopResultBuilder]: For program point L241-1(line 241) no Hoare annotation was computed. [2023-02-14 10:49:09,385 INFO L899 garLoopResultBuilder]: For program point L17(line 17) no Hoare annotation was computed. [2023-02-14 10:49:09,385 INFO L899 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2023-02-14 10:49:09,385 INFO L899 garLoopResultBuilder]: For program point L16-2(lines 15 20) no Hoare annotation was computed. [2023-02-14 10:49:09,386 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 15 20) no Hoare annotation was computed. [2023-02-14 10:49:09,386 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 15 20) the Hoare annotation is: true [2023-02-14 10:49:09,386 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2023-02-14 10:49:09,389 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:49:09,391 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-14 10:49:09,408 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:49:09 BoogieIcfgContainer [2023-02-14 10:49:09,408 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-14 10:49:09,409 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-14 10:49:09,409 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-14 10:49:09,410 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-14 10:49:09,410 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:48:54" (3/4) ... [2023-02-14 10:49:09,412 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-14 10:49:09,417 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure base2flt [2023-02-14 10:49:09,417 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2023-02-14 10:49:09,431 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 25 nodes and edges [2023-02-14 10:49:09,431 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2023-02-14 10:49:09,432 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-02-14 10:49:09,432 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-14 10:49:09,451 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((m == \old(m) && \old(e) <= e) && (e == \old(e) || e == 0)) && __retres4 == 0) || !(\old(m) % 4294967296 <= 0) [2023-02-14 10:49:09,451 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: !(\old(m) % 4294967296 <= 0) [2023-02-14 10:49:09,451 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (\old(e) <= e && !(\old(m) % 4294967296 <= 0)) && !(\old(m) == 1) [2023-02-14 10:49:09,451 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: !(\old(m) % 4294967296 <= 0) [2023-02-14 10:49:09,453 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (sa + 1 <= 0 || (tmp == 1 && sa == 1)) || ((\result % 4294967296 < 1 && zero % 4294967296 < 1) && __retres10 % 4294967296 < 1) [2023-02-14 10:49:09,479 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-14 10:49:09,480 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-14 10:49:09,480 INFO L158 Benchmark]: Toolchain (without parser) took 16222.42ms. Allocated memory was 155.2MB in the beginning and 465.6MB in the end (delta: 310.4MB). Free memory was 117.2MB in the beginning and 367.3MB in the end (delta: -250.1MB). Peak memory consumption was 61.9MB. Max. memory is 16.1GB. [2023-02-14 10:49:09,481 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 155.2MB. Free memory was 97.6MB in the beginning and 97.5MB in the end (delta: 125.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-14 10:49:09,481 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.27ms. Allocated memory is still 155.2MB. Free memory was 117.2MB in the beginning and 103.9MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-02-14 10:49:09,481 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.21ms. Allocated memory is still 155.2MB. Free memory was 103.9MB in the beginning and 101.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 10:49:09,482 INFO L158 Benchmark]: Boogie Preprocessor took 48.56ms. Allocated memory is still 155.2MB. Free memory was 101.9MB in the beginning and 100.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-14 10:49:09,482 INFO L158 Benchmark]: RCFGBuilder took 470.07ms. Allocated memory is still 155.2MB. Free memory was 100.4MB in the beginning and 81.0MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-02-14 10:49:09,482 INFO L158 Benchmark]: TraceAbstraction took 15359.74ms. Allocated memory was 155.2MB in the beginning and 465.6MB in the end (delta: 310.4MB). Free memory was 80.1MB in the beginning and 372.5MB in the end (delta: -292.5MB). Peak memory consumption was 240.2MB. Max. memory is 16.1GB. [2023-02-14 10:49:09,484 INFO L158 Benchmark]: Witness Printer took 70.47ms. Allocated memory is still 465.6MB. Free memory was 372.5MB in the beginning and 367.3MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-02-14 10:49:09,487 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 155.2MB. Free memory was 97.6MB in the beginning and 97.5MB in the end (delta: 125.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 206.27ms. Allocated memory is still 155.2MB. Free memory was 117.2MB in the beginning and 103.9MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.21ms. Allocated memory is still 155.2MB. Free memory was 103.9MB in the beginning and 101.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.56ms. Allocated memory is still 155.2MB. Free memory was 101.9MB in the beginning and 100.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 470.07ms. Allocated memory is still 155.2MB. Free memory was 100.4MB in the beginning and 81.0MB in the end (delta: 19.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 15359.74ms. Allocated memory was 155.2MB in the beginning and 465.6MB in the end (delta: 310.4MB). Free memory was 80.1MB in the beginning and 372.5MB in the end (delta: -292.5MB). Peak memory consumption was 240.2MB. Max. memory is 16.1GB. * Witness Printer took 70.47ms. Allocated memory is still 465.6MB. Free memory was 372.5MB in the beginning and 367.3MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 75 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 15.3s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 4.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2582 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2581 mSDsluCounter, 10602 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8800 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2277 IncrementalHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 1802 mSDtfsCounter, 2277 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1948 GetRequests, 1682 SyntacticMatches, 2 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=151occurred in iteration=6, InterpolantAutomatonStates: 175, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 20 MinimizatonAttempts, 548 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 158 PreInvPairs, 350 NumberOfFragments, 123 HoareAnnotationTreeSize, 158 FomulaSimplifications, 97065 FormulaSimplificationTreeSizeReduction, 4.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 78512 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.9s InterpolantComputationTime, 2168 NumberOfCodeBlocks, 2168 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 2823 ConstructedInterpolants, 0 QuantifiedInterpolants, 5278 SizeOfPredicates, 65 NumberOfNonLiveVariables, 2760 ConjunctsInSsa, 174 ConjunctsInUnsatCore, 45 InterpolantComputations, 13 PerfectInterpolantSequences, 1308/1570 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 76]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 220]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 157]: Loop Invariant Derived loop invariant: (sa + 1 <= 0 || (tmp == 1 && sa == 1)) || (zero % 4294967296 < 1 && __retres10 % 4294967296 < 1) - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((m == \old(m) && \old(e) <= e) && (e == \old(e) || e == 0)) && __retres4 == 0) || !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: !(\old(m) % 4294967296 <= 0) - InvariantResult [Line: 57]: Loop Invariant Derived loop invariant: (\old(e) <= e && !(\old(m) % 4294967296 <= 0)) && !(\old(m) == 1) - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: (sa + 1 <= 0 || (tmp == 1 && sa == 1)) || ((\result % 4294967296 < 1 && zero % 4294967296 < 1) && __retres10 % 4294967296 < 1) RESULT: Ultimate proved your program to be correct! [2023-02-14 10:49:09,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE