./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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_3a.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 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 08:33:11,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 08:33:11,655 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 08:33:11,718 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 08:33:11,719 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 08:33:11,721 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 08:33:11,722 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 08:33:11,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 08:33:11,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 08:33:11,728 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 08:33:11,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 08:33:11,730 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 08:33:11,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 08:33:11,735 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 08:33:11,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 08:33:11,737 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 08:33:11,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 08:33:11,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 08:33:11,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 08:33:11,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 08:33:11,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 08:33:11,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 08:33:11,748 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 08:33:11,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 08:33:11,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 08:33:11,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 08:33:11,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 08:33:11,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 08:33:11,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 08:33:11,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 08:33:11,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 08:33:11,754 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 08:33:11,755 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 08:33:11,756 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 08:33:11,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 08:33:11,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 08:33:11,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 08:33:11,758 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 08:33:11,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 08:33:11,758 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 08:33:11,759 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 08:33:11,759 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 08:33:11,784 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 08:33:11,784 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 08:33:11,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 08:33:11,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 08:33:11,785 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 08:33:11,785 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 08:33:11,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 08:33:11,786 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 08:33:11,786 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 08:33:11,786 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 08:33:11,787 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 08:33:11,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 08:33:11,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 08:33:11,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 08:33:11,788 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 08:33:11,788 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 08:33:11,788 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 08:33:11,789 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 08:33:11,789 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 08:33:11,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 08:33:11,789 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 08:33:11,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 08:33:11,790 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 08:33:11,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 08:33:11,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:33:11,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 08:33:11,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 08:33:11,791 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 08:33:11,791 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 08:33:11,792 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 08:33:11,792 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 08:33:11,792 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 08:33:11,792 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 08:33:11,792 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 08:33:11,792 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95f89ee6bcff8f17eb3e93b344abecdfb8ddea0894d1b25afafccf6235d7ced6 [2021-12-22 08:33:11,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 08:33:11,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 08:33:11,963 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 08:33:11,963 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 08:33:11,964 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 08:33:11,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2021-12-22 08:33:12,004 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df38a4749/7675fef786b14298a16560ecf953f7a3/FLAGc588d7195 [2021-12-22 08:33:12,386 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 08:33:12,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c [2021-12-22 08:33:12,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df38a4749/7675fef786b14298a16560ecf953f7a3/FLAGc588d7195 [2021-12-22 08:33:12,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df38a4749/7675fef786b14298a16560ecf953f7a3 [2021-12-22 08:33:12,409 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 08:33:12,409 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 08:33:12,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 08:33:12,412 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 08:33:12,414 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 08:33:12,415 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:33:12" (1/1) ... [2021-12-22 08:33:12,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1408c14d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12, skipping insertion in model container [2021-12-22 08:33:12,416 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:33:12" (1/1) ... [2021-12-22 08:33:12,420 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 08:33:12,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 08:33:12,556 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2021-12-22 08:33:12,581 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:33:12,586 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 08:33:12,593 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_3a.c.cil.c[728,741] [2021-12-22 08:33:12,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 08:33:12,616 INFO L208 MainTranslator]: Completed translation [2021-12-22 08:33:12,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12 WrapperNode [2021-12-22 08:33:12,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 08:33:12,617 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 08:33:12,618 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 08:33:12,618 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 08:33:12,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12" (1/1) ... [2021-12-22 08:33:12,628 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12" (1/1) ... [2021-12-22 08:33:12,640 INFO L137 Inliner]: procedures = 17, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 112 [2021-12-22 08:33:12,641 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 08:33:12,641 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 08:33:12,641 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 08:33:12,642 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 08:33:12,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12" (1/1) ... [2021-12-22 08:33:12,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12" (1/1) ... [2021-12-22 08:33:12,649 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12" (1/1) ... [2021-12-22 08:33:12,649 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12" (1/1) ... [2021-12-22 08:33:12,652 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12" (1/1) ... [2021-12-22 08:33:12,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12" (1/1) ... [2021-12-22 08:33:12,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12" (1/1) ... [2021-12-22 08:33:12,657 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 08:33:12,658 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 08:33:12,658 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 08:33:12,658 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 08:33:12,659 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12" (1/1) ... [2021-12-22 08:33:12,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 08:33:12,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:12,681 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) [2021-12-22 08:33:12,698 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 [2021-12-22 08:33:12,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 08:33:12,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 08:33:12,713 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2021-12-22 08:33:12,713 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2021-12-22 08:33:12,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 08:33:12,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 08:33:12,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-22 08:33:12,715 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-22 08:33:12,778 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 08:33:12,780 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 08:33:12,915 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 08:33:12,919 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 08:33:12,919 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 08:33:12,920 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:33:12 BoogieIcfgContainer [2021-12-22 08:33:12,920 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 08:33:12,922 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 08:33:12,922 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 08:33:12,924 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 08:33:12,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:33:12" (1/3) ... [2021-12-22 08:33:12,924 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528b9f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:33:12, skipping insertion in model container [2021-12-22 08:33:12,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:33:12" (2/3) ... [2021-12-22 08:33:12,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528b9f5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:33:12, skipping insertion in model container [2021-12-22 08:33:12,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:33:12" (3/3) ... [2021-12-22 08:33:12,926 INFO L111 eAbstractionObserver]: Analyzing ICFG soft_float_3a.c.cil.c [2021-12-22 08:33:12,929 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 08:33:12,930 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 08:33:12,960 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 08:33:12,964 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 08:33:12,965 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 08:33:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 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) [2021-12-22 08:33:12,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-22 08:33:12,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:12,984 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:33:12,985 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:12,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:12,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1696138713, now seen corresponding path program 1 times [2021-12-22 08:33:12,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:12,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394526534] [2021-12-22 08:33:12,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:12,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:13,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:33:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:33:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-22 08:33:13,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:13,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394526534] [2021-12-22 08:33:13,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394526534] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:13,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:13,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 08:33:13,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217323498] [2021-12-22 08:33:13,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:13,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 08:33:13,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:13,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 08:33:13,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 08:33:13,285 INFO L87 Difference]: Start difference. First operand has 51 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 44 states have internal predecessors, (66), 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 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-12-22 08:33:13,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:13,316 INFO L93 Difference]: Finished difference Result 104 states and 158 transitions. [2021-12-22 08:33:13,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 08:33:13,319 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 41 [2021-12-22 08:33:13,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:13,327 INFO L225 Difference]: With dead ends: 104 [2021-12-22 08:33:13,327 INFO L226 Difference]: Without dead ends: 45 [2021-12-22 08:33:13,331 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:33:13,335 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 4 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 136 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 [2021-12-22 08:33:13,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 136 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:33:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-22 08:33:13,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-22 08:33:13,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 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) [2021-12-22 08:33:13,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 63 transitions. [2021-12-22 08:33:13,368 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 63 transitions. Word has length 41 [2021-12-22 08:33:13,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:13,369 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 63 transitions. [2021-12-22 08:33:13,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2021-12-22 08:33:13,369 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 63 transitions. [2021-12-22 08:33:13,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 08:33:13,371 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:13,371 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:33:13,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 08:33:13,372 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:13,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:13,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1289248129, now seen corresponding path program 1 times [2021-12-22 08:33:13,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:13,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882260771] [2021-12-22 08:33:13,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:13,377 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:33:13,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:33:13,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,498 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-22 08:33:13,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:13,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882260771] [2021-12-22 08:33:13,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882260771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:13,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:13,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 08:33:13,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740493488] [2021-12-22 08:33:13,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:13,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:33:13,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:13,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:33:13,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 08:33:13,503 INFO L87 Difference]: Start difference. First operand 45 states and 63 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-12-22 08:33:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:13,525 INFO L93 Difference]: Finished difference Result 55 states and 74 transitions. [2021-12-22 08:33:13,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:33:13,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 43 [2021-12-22 08:33:13,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:13,527 INFO L225 Difference]: With dead ends: 55 [2021-12-22 08:33:13,527 INFO L226 Difference]: Without dead ends: 45 [2021-12-22 08:33:13,527 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:33:13,528 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 1 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 181 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 [2021-12-22 08:33:13,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 181 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:33:13,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-12-22 08:33:13,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-12-22 08:33:13,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 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) [2021-12-22 08:33:13,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2021-12-22 08:33:13,543 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 43 [2021-12-22 08:33:13,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:13,544 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2021-12-22 08:33:13,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2021-12-22 08:33:13,545 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2021-12-22 08:33:13,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 08:33:13,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:13,547 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:33:13,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 08:33:13,548 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:13,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:13,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2098594755, now seen corresponding path program 1 times [2021-12-22 08:33:13,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:13,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119870620] [2021-12-22 08:33:13,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:13,552 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:13,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:13,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:13,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:33:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:33:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:13,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:13,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119870620] [2021-12-22 08:33:13,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119870620] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:13,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49400716] [2021-12-22 08:33:13,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:13,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:13,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:13,643 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) [2021-12-22 08:33:13,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 08:33:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:13,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-22 08:33:13,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:13,842 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:33:13,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 08:33:13,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49400716] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:13,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:33:13,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 8] total 14 [2021-12-22 08:33:13,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634262386] [2021-12-22 08:33:13,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:14,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:33:14,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:33:14,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:33:14,002 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-12-22 08:33:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:14,057 INFO L93 Difference]: Finished difference Result 82 states and 113 transitions. [2021-12-22 08:33:14,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:33:14,058 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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 43 [2021-12-22 08:33:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:14,059 INFO L225 Difference]: With dead ends: 82 [2021-12-22 08:33:14,060 INFO L226 Difference]: Without dead ends: 61 [2021-12-22 08:33:14,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-12-22 08:33:14,061 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 15 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:14,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 282 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:33:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-22 08:33:14,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2021-12-22 08:33:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 43 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-22 08:33:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 71 transitions. [2021-12-22 08:33:14,074 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 71 transitions. Word has length 43 [2021-12-22 08:33:14,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:14,075 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 71 transitions. [2021-12-22 08:33:14,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 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) [2021-12-22 08:33:14,075 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 71 transitions. [2021-12-22 08:33:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-22 08:33:14,079 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:14,079 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:33:14,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-22 08:33:14,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:14,314 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:14,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:14,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1609566527, now seen corresponding path program 1 times [2021-12-22 08:33:14,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:14,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100035325] [2021-12-22 08:33:14,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:14,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:14,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:14,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:14,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:14,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:14,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-22 08:33:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:14,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-22 08:33:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:14,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100035325] [2021-12-22 08:33:14,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100035325] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290817429] [2021-12-22 08:33:14,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:14,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:14,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:14,404 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) [2021-12-22 08:33:14,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 08:33:14,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:14,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-22 08:33:14,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:14,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-22 08:33:14,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:14,730 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-22 08:33:14,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290817429] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:33:14,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:33:14,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 6] total 14 [2021-12-22 08:33:14,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706402490] [2021-12-22 08:33:14,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:33:14,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-22 08:33:14,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-22 08:33:14,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-12-22 08:33:14,738 INFO L87 Difference]: Start difference. First operand 51 states and 71 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 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) [2021-12-22 08:33:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:14,948 INFO L93 Difference]: Finished difference Result 144 states and 210 transitions. [2021-12-22 08:33:14,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-22 08:33:14,950 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 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 43 [2021-12-22 08:33:14,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:14,952 INFO L225 Difference]: With dead ends: 144 [2021-12-22 08:33:14,952 INFO L226 Difference]: Without dead ends: 96 [2021-12-22 08:33:14,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2021-12-22 08:33:14,953 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 58 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:14,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 450 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:33:14,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-12-22 08:33:14,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2021-12-22 08:33:14,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 70 states have (on average 1.3142857142857143) internal successors, (92), 69 states have internal predecessors, (92), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (15), 8 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-22 08:33:14,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 113 transitions. [2021-12-22 08:33:14,962 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 113 transitions. Word has length 43 [2021-12-22 08:33:14,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:14,962 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 113 transitions. [2021-12-22 08:33:14,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 12 states have internal predecessors, (59), 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) [2021-12-22 08:33:14,962 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 113 transitions. [2021-12-22 08:33:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-22 08:33:14,967 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:14,967 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:33:14,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 08:33:15,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-22 08:33:15,186 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:15,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:15,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1478276807, now seen corresponding path program 1 times [2021-12-22 08:33:15,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:15,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164610679] [2021-12-22 08:33:15,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:15,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:15,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:15,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:15,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-22 08:33:15,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:15,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-12-22 08:33:15,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:15,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:15,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:15,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164610679] [2021-12-22 08:33:15,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164610679] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:15,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376351754] [2021-12-22 08:33:15,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:15,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:15,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:15,246 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) [2021-12-22 08:33:15,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 08:33:15,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:15,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 08:33:15,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:33:15,349 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:33:15,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376351754] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:15,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 08:33:15,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-22 08:33:15,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509257969] [2021-12-22 08:33:15,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:15,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 08:33:15,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:15,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 08:33:15,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:33:15,352 INFO L87 Difference]: Start difference. First operand 81 states and 113 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2021-12-22 08:33:15,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:15,383 INFO L93 Difference]: Finished difference Result 160 states and 225 transitions. [2021-12-22 08:33:15,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 08:33:15,384 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 48 [2021-12-22 08:33:15,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:15,387 INFO L225 Difference]: With dead ends: 160 [2021-12-22 08:33:15,387 INFO L226 Difference]: Without dead ends: 86 [2021-12-22 08:33:15,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 08:33:15,391 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:15,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 151 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:33:15,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-12-22 08:33:15,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-12-22 08:33:15,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 74 states have (on average 1.3108108108108107) internal successors, (97), 74 states have internal predecessors, (97), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-12-22 08:33:15,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 121 transitions. [2021-12-22 08:33:15,398 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 121 transitions. Word has length 48 [2021-12-22 08:33:15,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:15,398 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 121 transitions. [2021-12-22 08:33:15,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2021-12-22 08:33:15,399 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 121 transitions. [2021-12-22 08:33:15,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 08:33:15,400 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:15,403 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:33:15,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 08:33:15,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:15,620 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:15,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:15,620 INFO L85 PathProgramCache]: Analyzing trace with hash -230486842, now seen corresponding path program 1 times [2021-12-22 08:33:15,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:15,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370083026] [2021-12-22 08:33:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:15,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:15,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:15,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:15,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 08:33:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:15,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 08:33:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:15,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:15,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370083026] [2021-12-22 08:33:15,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370083026] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:15,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695547016] [2021-12-22 08:33:15,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:15,679 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:15,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:15,680 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) [2021-12-22 08:33:15,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 08:33:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:15,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-22 08:33:15,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:15,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:15,879 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-22 08:33:15,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695547016] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:15,879 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-22 08:33:15,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 7] total 13 [2021-12-22 08:33:15,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580475347] [2021-12-22 08:33:15,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:15,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:33:15,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:15,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:33:15,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:33:15,882 INFO L87 Difference]: Start difference. First operand 86 states and 121 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-12-22 08:33:15,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:15,928 INFO L93 Difference]: Finished difference Result 109 states and 145 transitions. [2021-12-22 08:33:15,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 08:33:15,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 50 [2021-12-22 08:33:15,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:15,930 INFO L225 Difference]: With dead ends: 109 [2021-12-22 08:33:15,930 INFO L226 Difference]: Without dead ends: 103 [2021-12-22 08:33:15,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-12-22 08:33:15,931 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 22 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 225 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 [2021-12-22 08:33:15,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 225 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:33:15,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-12-22 08:33:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2021-12-22 08:33:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.2696629213483146) internal successors, (113), 89 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (18), 8 states have call predecessors, (18), 5 states have call successors, (18) [2021-12-22 08:33:15,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2021-12-22 08:33:15,939 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 50 [2021-12-22 08:33:15,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:15,939 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2021-12-22 08:33:15,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-12-22 08:33:15,940 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2021-12-22 08:33:15,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-22 08:33:15,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:15,941 INFO L514 BasicCegarLoop]: 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] [2021-12-22 08:33:15,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 08:33:16,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:16,160 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:16,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:16,161 INFO L85 PathProgramCache]: Analyzing trace with hash -173228540, now seen corresponding path program 1 times [2021-12-22 08:33:16,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:16,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960276525] [2021-12-22 08:33:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:16,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 08:33:16,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-22 08:33:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-22 08:33:16,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:16,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960276525] [2021-12-22 08:33:16,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960276525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:16,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 08:33:16,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-22 08:33:16,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73777354] [2021-12-22 08:33:16,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:16,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-22 08:33:16,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:16,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-22 08:33:16,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-22 08:33:16,220 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-12-22 08:33:16,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:16,236 INFO L93 Difference]: Finished difference Result 107 states and 142 transitions. [2021-12-22 08:33:16,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:33:16,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 50 [2021-12-22 08:33:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:16,238 INFO L225 Difference]: With dead ends: 107 [2021-12-22 08:33:16,238 INFO L226 Difference]: Without dead ends: 90 [2021-12-22 08:33:16,238 INFO L932 BasicCegarLoop]: 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 [2021-12-22 08:33:16,239 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 2 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 293 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 [2021-12-22 08:33:16,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 293 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:33:16,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-12-22 08:33:16,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-12-22 08:33:16,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 79 states have internal predecessors, (98), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-22 08:33:16,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2021-12-22 08:33:16,245 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 50 [2021-12-22 08:33:16,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:16,245 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2021-12-22 08:33:16,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-12-22 08:33:16,245 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2021-12-22 08:33:16,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-12-22 08:33:16,246 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:16,246 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-22 08:33:16,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 08:33:16,246 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:16,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:16,247 INFO L85 PathProgramCache]: Analyzing trace with hash -100773931, now seen corresponding path program 1 times [2021-12-22 08:33:16,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:16,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034373772] [2021-12-22 08:33:16,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:16,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:16,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-22 08:33:16,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-12-22 08:33:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:16,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:16,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034373772] [2021-12-22 08:33:16,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034373772] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:16,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338587233] [2021-12-22 08:33:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:16,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:16,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:16,299 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) [2021-12-22 08:33:16,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-22 08:33:16,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 08:33:16,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:16,435 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:33:16,435 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 08:33:16,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338587233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 08:33:16,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 08:33:16,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-12-22 08:33:16,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219042350] [2021-12-22 08:33:16,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 08:33:16,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 08:33:16,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:16,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 08:33:16,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-22 08:33:16,438 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-12-22 08:33:16,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:16,515 INFO L93 Difference]: Finished difference Result 190 states and 256 transitions. [2021-12-22 08:33:16,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-22 08:33:16,515 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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 52 [2021-12-22 08:33:16,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:16,516 INFO L225 Difference]: With dead ends: 190 [2021-12-22 08:33:16,516 INFO L226 Difference]: Without dead ends: 107 [2021-12-22 08:33:16,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-22 08:33:16,517 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 15 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:16,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 193 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:33:16,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-22 08:33:16,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2021-12-22 08:33:16,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 79 states have (on average 1.2658227848101267) internal successors, (100), 80 states have internal predecessors, (100), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-22 08:33:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 121 transitions. [2021-12-22 08:33:16,528 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 121 transitions. Word has length 52 [2021-12-22 08:33:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:16,530 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 121 transitions. [2021-12-22 08:33:16,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 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) [2021-12-22 08:33:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 121 transitions. [2021-12-22 08:33:16,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-22 08:33:16,531 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:16,532 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-22 08:33:16,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-22 08:33:16,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:16,747 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:16,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1073437282, now seen corresponding path program 1 times [2021-12-22 08:33:16,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:16,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895845492] [2021-12-22 08:33:16,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:16,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-22 08:33:16,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-22 08:33:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,804 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:16,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:16,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895845492] [2021-12-22 08:33:16,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895845492] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:16,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351450922] [2021-12-22 08:33:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:16,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:16,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:16,806 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) [2021-12-22 08:33:16,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-22 08:33:16,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:16,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-22 08:33:16,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:33:16,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:17,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351450922] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:33:17,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:33:17,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2021-12-22 08:33:17,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362362427] [2021-12-22 08:33:17,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:33:17,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-22 08:33:17,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:17,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-22 08:33:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 08:33:17,037 INFO L87 Difference]: Start difference. First operand 91 states and 121 transitions. Second operand has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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) [2021-12-22 08:33:17,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:17,116 INFO L93 Difference]: Finished difference Result 211 states and 291 transitions. [2021-12-22 08:33:17,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 08:33:17,116 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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 53 [2021-12-22 08:33:17,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:17,117 INFO L225 Difference]: With dead ends: 211 [2021-12-22 08:33:17,118 INFO L226 Difference]: Without dead ends: 127 [2021-12-22 08:33:17,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-12-22 08:33:17,119 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 101 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:17,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 232 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 08:33:17,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-12-22 08:33:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2021-12-22 08:33:17,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 88 states have internal predecessors, (113), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-22 08:33:17,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2021-12-22 08:33:17,128 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 53 [2021-12-22 08:33:17,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:17,128 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2021-12-22 08:33:17,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.0) internal successors, (66), 11 states have internal predecessors, (66), 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) [2021-12-22 08:33:17,128 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2021-12-22 08:33:17,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-22 08:33:17,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:17,129 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-12-22 08:33:17,158 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-22 08:33:17,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:17,344 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:17,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:17,344 INFO L85 PathProgramCache]: Analyzing trace with hash -2015352415, now seen corresponding path program 1 times [2021-12-22 08:33:17,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:17,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635029555] [2021-12-22 08:33:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:17,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:17,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:17,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:17,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-22 08:33:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:17,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-22 08:33:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:17,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:17,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635029555] [2021-12-22 08:33:17,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635029555] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:17,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709104093] [2021-12-22 08:33:17,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:17,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:17,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:17,419 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) [2021-12-22 08:33:17,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-22 08:33:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:17,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-22 08:33:17,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:17,545 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 26 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:33:17,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:17,672 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:17,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709104093] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:33:17,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:33:17,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2021-12-22 08:33:17,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596014406] [2021-12-22 08:33:17,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:33:17,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-22 08:33:17,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:17,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-22 08:33:17,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-12-22 08:33:17,674 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 08:33:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:18,017 INFO L93 Difference]: Finished difference Result 223 states and 308 transitions. [2021-12-22 08:33:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-22 08:33:18,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2021-12-22 08:33:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:18,018 INFO L225 Difference]: With dead ends: 223 [2021-12-22 08:33:18,018 INFO L226 Difference]: Without dead ends: 131 [2021-12-22 08:33:18,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-12-22 08:33:18,019 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 144 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:18,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 241 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:33:18,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-22 08:33:18,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2021-12-22 08:33:18,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 91 states have (on average 1.3186813186813187) internal successors, (120), 92 states have internal predecessors, (120), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-22 08:33:18,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 141 transitions. [2021-12-22 08:33:18,027 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 141 transitions. Word has length 55 [2021-12-22 08:33:18,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:18,027 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 141 transitions. [2021-12-22 08:33:18,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 08:33:18,027 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 141 transitions. [2021-12-22 08:33:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 08:33:18,028 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:18,028 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 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] [2021-12-22 08:33:18,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-22 08:33:18,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:18,245 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:18,245 INFO L85 PathProgramCache]: Analyzing trace with hash 173315734, now seen corresponding path program 2 times [2021-12-22 08:33:18,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:18,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535116192] [2021-12-22 08:33:18,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:18,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:18,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:18,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:18,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-22 08:33:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:18,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2021-12-22 08:33:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:18,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:18,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535116192] [2021-12-22 08:33:18,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535116192] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:18,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126095445] [2021-12-22 08:33:18,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:33:18,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:18,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:18,340 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) [2021-12-22 08:33:18,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-22 08:33:18,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:33:18,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:33:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 08:33:18,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:33:18,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:18,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126095445] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:33:18,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:33:18,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2021-12-22 08:33:18,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563770946] [2021-12-22 08:33:18,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:33:18,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-22 08:33:18,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:18,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-22 08:33:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-12-22 08:33:18,658 INFO L87 Difference]: Start difference. First operand 103 states and 141 transitions. Second operand has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 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) [2021-12-22 08:33:18,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:18,796 INFO L93 Difference]: Finished difference Result 274 states and 391 transitions. [2021-12-22 08:33:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-22 08:33:18,797 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 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 62 [2021-12-22 08:33:18,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:18,798 INFO L225 Difference]: With dead ends: 274 [2021-12-22 08:33:18,798 INFO L226 Difference]: Without dead ends: 178 [2021-12-22 08:33:18,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=270, Invalid=432, Unknown=0, NotChecked=0, Total=702 [2021-12-22 08:33:18,799 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 167 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:18,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 420 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:33:18,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-22 08:33:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 117. [2021-12-22 08:33:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 105 states have (on average 1.361904761904762) internal successors, (143), 106 states have internal predecessors, (143), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-22 08:33:18,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 164 transitions. [2021-12-22 08:33:18,808 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 164 transitions. Word has length 62 [2021-12-22 08:33:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:18,808 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 164 transitions. [2021-12-22 08:33:18,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.65) internal successors, (93), 20 states have internal predecessors, (93), 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) [2021-12-22 08:33:18,809 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 164 transitions. [2021-12-22 08:33:18,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 08:33:18,809 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:18,810 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 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] [2021-12-22 08:33:18,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-22 08:33:19,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-22 08:33:19,023 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:19,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:19,024 INFO L85 PathProgramCache]: Analyzing trace with hash 103329953, now seen corresponding path program 2 times [2021-12-22 08:33:19,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:19,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325573667] [2021-12-22 08:33:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:19,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:19,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:19,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:19,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-22 08:33:19,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:19,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2021-12-22 08:33:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:19,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:19,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325573667] [2021-12-22 08:33:19,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325573667] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:19,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587349879] [2021-12-22 08:33:19,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-22 08:33:19,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:19,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:19,148 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) [2021-12-22 08:33:19,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-22 08:33:19,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-22 08:33:19,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:33:19,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-22 08:33:19,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:33:19,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:19,642 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 55 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:19,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587349879] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:33:19,642 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:33:19,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-12-22 08:33:19,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209891602] [2021-12-22 08:33:19,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:33:19,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-22 08:33:19,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:19,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-22 08:33:19,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2021-12-22 08:33:19,644 INFO L87 Difference]: Start difference. First operand 117 states and 164 transitions. Second operand has 25 states, 25 states have (on average 4.2) internal successors, (105), 25 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 08:33:36,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:36,637 INFO L93 Difference]: Finished difference Result 293 states and 416 transitions. [2021-12-22 08:33:36,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-12-22 08:33:36,638 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.2) internal successors, (105), 25 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2021-12-22 08:33:36,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:36,639 INFO L225 Difference]: With dead ends: 293 [2021-12-22 08:33:36,639 INFO L226 Difference]: Without dead ends: 183 [2021-12-22 08:33:36,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=499, Invalid=902, Unknown=5, NotChecked=0, Total=1406 [2021-12-22 08:33:36,640 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 271 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:36,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 754 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-22 08:33:36,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2021-12-22 08:33:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 127. [2021-12-22 08:33:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 115 states have (on average 1.391304347826087) internal successors, (160), 116 states have internal predecessors, (160), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-22 08:33:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 181 transitions. [2021-12-22 08:33:36,648 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 181 transitions. Word has length 67 [2021-12-22 08:33:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:36,648 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 181 transitions. [2021-12-22 08:33:36,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.2) internal successors, (105), 25 states have internal predecessors, (105), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 08:33:36,649 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 181 transitions. [2021-12-22 08:33:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-22 08:33:36,649 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:36,649 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 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] [2021-12-22 08:33:36,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-22 08:33:36,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:36,867 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:36,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:36,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1524110314, now seen corresponding path program 3 times [2021-12-22 08:33:36,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:36,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555212565] [2021-12-22 08:33:36,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:36,867 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:36,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:36,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:36,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:37,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-22 08:33:37,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:37,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 08:33:37,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:37,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:37,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555212565] [2021-12-22 08:33:37,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555212565] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:37,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322338826] [2021-12-22 08:33:37,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:33:37,019 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:37,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:37,020 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) [2021-12-22 08:33:37,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-22 08:33:37,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-12-22 08:33:37,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:33:37,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-22 08:33:37,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:33:37,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:38,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322338826] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:33:38,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:33:38,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2021-12-22 08:33:38,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040620338] [2021-12-22 08:33:38,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:33:38,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-22 08:33:38,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:38,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-22 08:33:38,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=916, Unknown=0, NotChecked=0, Total=1406 [2021-12-22 08:33:38,409 INFO L87 Difference]: Start difference. First operand 127 states and 181 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 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) [2021-12-22 08:33:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 08:33:38,686 INFO L93 Difference]: Finished difference Result 400 states and 591 transitions. [2021-12-22 08:33:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-12-22 08:33:38,687 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 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 80 [2021-12-22 08:33:38,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 08:33:38,689 INFO L225 Difference]: With dead ends: 400 [2021-12-22 08:33:38,689 INFO L226 Difference]: Without dead ends: 280 [2021-12-22 08:33:38,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=972, Invalid=1578, Unknown=0, NotChecked=0, Total=2550 [2021-12-22 08:33:38,691 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 503 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 503 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 08:33:38,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [503 Valid, 451 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 08:33:38,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-12-22 08:33:38,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 153. [2021-12-22 08:33:38,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 141 states have (on average 1.4397163120567376) internal successors, (203), 142 states have internal predecessors, (203), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-12-22 08:33:38,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 224 transitions. [2021-12-22 08:33:38,705 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 224 transitions. Word has length 80 [2021-12-22 08:33:38,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 08:33:38,706 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 224 transitions. [2021-12-22 08:33:38,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 38 states have internal predecessors, (147), 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) [2021-12-22 08:33:38,706 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 224 transitions. [2021-12-22 08:33:38,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 08:33:38,707 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 08:33:38,707 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 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] [2021-12-22 08:33:38,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-22 08:33:38,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-22 08:33:38,912 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 08:33:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 08:33:38,912 INFO L85 PathProgramCache]: Analyzing trace with hash 264388257, now seen corresponding path program 3 times [2021-12-22 08:33:38,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 08:33:38,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232883207] [2021-12-22 08:33:38,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 08:33:38,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 08:33:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:38,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-22 08:33:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:38,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-22 08:33:38,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:39,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-22 08:33:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:39,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-12-22 08:33:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 08:33:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 283 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:39,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 08:33:39,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232883207] [2021-12-22 08:33:39,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232883207] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 08:33:39,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17290531] [2021-12-22 08:33:39,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-22 08:33:39,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 08:33:39,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 08:33:39,229 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) [2021-12-22 08:33:39,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-22 08:33:42,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-12-22 08:33:42,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-22 08:33:42,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-22 08:33:42,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 08:33:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 26 proven. 273 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 08:33:42,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 08:33:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 4 proven. 283 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 08:33:43,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17290531] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 08:33:43,783 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 08:33:43,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2021-12-22 08:33:43,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522000384] [2021-12-22 08:33:43,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 08:33:43,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-22 08:33:43,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 08:33:43,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-22 08:33:43,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2021-12-22 08:33:43,786 INFO L87 Difference]: Start difference. First operand 153 states and 224 transitions. Second operand has 49 states, 49 states have (on average 3.6122448979591835) internal successors, (177), 49 states have internal predecessors, (177), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-22 08:34:00,218 WARN L227 SmtUtils]: Spent 14.45s on a formula simplification. DAG size of input: 51 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)