./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i -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 cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:06:54,588 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:06:54,598 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:06:54,642 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:06:54,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:06:54,647 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:06:54,648 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:06:54,650 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:06:54,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:06:54,656 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:06:54,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:06:54,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:06:54,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:06:54,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:06:54,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:06:54,665 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:06:54,667 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:06:54,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:06:54,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:06:54,671 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:06:54,675 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:06:54,676 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:06:54,676 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:06:54,677 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:06:54,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:06:54,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:06:54,681 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:06:54,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:06:54,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:06:54,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:06:54,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:06:54,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:06:54,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:06:54,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:06:54,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:06:54,686 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:06:54,687 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:06:54,687 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:06:54,687 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:06:54,688 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:06:54,688 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:06:54,689 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:06:54,712 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:06:54,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:06:54,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:06:54,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:06:54,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:06:54,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:06:54,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:06:54,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:06:54,715 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:06:54,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:06:54,716 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:06:54,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:06:54,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:06:54,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:06:54,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:06:54,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:06:54,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:06:54,717 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:06:54,717 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:06:54,717 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:06:54,717 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:06:54,717 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:06:54,717 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:06:54,718 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:06:54,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:06:54,718 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:06:54,718 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:06:54,718 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:06:54,718 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:06:54,718 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:06:54,719 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:06:54,719 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:06:54,719 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:06:54,719 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:06:54,719 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cae1888d2d961d86748cda3b827a90e6d152bf2b6038710fc1a5581289f20b0c [2021-12-14 11:06:54,901 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:06:54,916 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:06:54,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:06:54,919 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:06:54,919 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:06:54,920 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2021-12-14 11:06:54,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f342b4de0/e16ebf406ab641c7a0a6ded23ed1c071/FLAG2c77e0db0 [2021-12-14 11:06:55,271 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:06:55,272 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_2_ground.i [2021-12-14 11:06:55,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f342b4de0/e16ebf406ab641c7a0a6ded23ed1c071/FLAG2c77e0db0 [2021-12-14 11:06:55,708 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f342b4de0/e16ebf406ab641c7a0a6ded23ed1c071 [2021-12-14 11:06:55,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:06:55,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:06:55,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:06:55,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:06:55,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:06:55,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:06:55" (1/1) ... [2021-12-14 11:06:55,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70031775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55, skipping insertion in model container [2021-12-14 11:06:55,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:06:55" (1/1) ... [2021-12-14 11:06:55,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:06:55,735 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:06:55,849 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/array-examples/sorting_selectionsort_2_ground.i[823,836] [2021-12-14 11:06:55,861 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:06:55,865 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:06:55,872 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/array-examples/sorting_selectionsort_2_ground.i[823,836] [2021-12-14 11:06:55,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:06:55,887 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:06:55,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55 WrapperNode [2021-12-14 11:06:55,887 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:06:55,888 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:06:55,888 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:06:55,888 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:06:55,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55" (1/1) ... [2021-12-14 11:06:55,897 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55" (1/1) ... [2021-12-14 11:06:55,910 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2021-12-14 11:06:55,910 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:06:55,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:06:55,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:06:55,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:06:55,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55" (1/1) ... [2021-12-14 11:06:55,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55" (1/1) ... [2021-12-14 11:06:55,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55" (1/1) ... [2021-12-14 11:06:55,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55" (1/1) ... [2021-12-14 11:06:55,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55" (1/1) ... [2021-12-14 11:06:55,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55" (1/1) ... [2021-12-14 11:06:55,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55" (1/1) ... [2021-12-14 11:06:55,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:06:55,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:06:55,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:06:55,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:06:55,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55" (1/1) ... [2021-12-14 11:06:55,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:06:55,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:06:55,990 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) [2021-12-14 11:06:56,012 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 [2021-12-14 11:06:56,022 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:06:56,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:06:56,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:06:56,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:06:56,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:06:56,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:06:56,023 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:06:56,023 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-14 11:06:56,023 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-14 11:06:56,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:06:56,073 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:06:56,074 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:06:56,208 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:06:56,213 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:06:56,213 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-12-14 11:06:56,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:06:56 BoogieIcfgContainer [2021-12-14 11:06:56,214 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:06:56,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:06:56,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:06:56,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:06:56,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:06:55" (1/3) ... [2021-12-14 11:06:56,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422fa223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:06:56, skipping insertion in model container [2021-12-14 11:06:56,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:06:55" (2/3) ... [2021-12-14 11:06:56,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@422fa223 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:06:56, skipping insertion in model container [2021-12-14 11:06:56,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:06:56" (3/3) ... [2021-12-14 11:06:56,220 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2021-12-14 11:06:56,224 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:06:56,224 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:06:56,262 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:06:56,267 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 [2021-12-14 11:06:56,268 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:06:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 11:06:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 11:06:56,283 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:06:56,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:06:56,284 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:06:56,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:06:56,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1922481208, now seen corresponding path program 1 times [2021-12-14 11:06:56,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:06:56,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618711582] [2021-12-14 11:06:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:06:56,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:06:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:06:56,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:06:56,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:06:56,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618711582] [2021-12-14 11:06:56,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618711582] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:06:56,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:06:56,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:06:56,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818250231] [2021-12-14 11:06:56,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:06:56,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:06:56,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:06:56,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:06:56,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:06:56,422 INFO L87 Difference]: Start difference. First operand has 40 states, 34 states have (on average 1.588235294117647) internal successors, (54), 35 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:56,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:06:56,517 INFO L93 Difference]: Finished difference Result 96 states and 155 transitions. [2021-12-14 11:06:56,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:06:56,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-14 11:06:56,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:06:56,525 INFO L225 Difference]: With dead ends: 96 [2021-12-14 11:06:56,526 INFO L226 Difference]: Without dead ends: 56 [2021-12-14 11:06:56,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:06:56,533 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 22 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:06:56,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 76 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:06:56,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-14 11:06:56,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 38. [2021-12-14 11:06:56,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 11:06:56,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-12-14 11:06:56,575 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 12 [2021-12-14 11:06:56,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:06:56,575 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-12-14 11:06:56,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:56,577 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-12-14 11:06:56,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 11:06:56,578 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:06:56,578 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:06:56,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:06:56,579 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:06:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:06:56,582 INFO L85 PathProgramCache]: Analyzing trace with hash -916904651, now seen corresponding path program 1 times [2021-12-14 11:06:56,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:06:56,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969317684] [2021-12-14 11:06:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:06:56,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:06:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:06:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:06:56,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:06:56,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969317684] [2021-12-14 11:06:56,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969317684] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:06:56,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451826631] [2021-12-14 11:06:56,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:06:56,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:06:56,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:06:56,695 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) [2021-12-14 11:06:56,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 11:06:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:06:56,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-14 11:06:56,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:06:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:06:56,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:06:56,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451826631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:06:56,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 11:06:56,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-14 11:06:56,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073833464] [2021-12-14 11:06:56,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:06:56,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:06:56,858 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:06:56,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:06:56,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:06:56,859 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:56,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:06:56,891 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2021-12-14 11:06:56,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:06:56,892 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 11:06:56,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:06:56,893 INFO L225 Difference]: With dead ends: 86 [2021-12-14 11:06:56,893 INFO L226 Difference]: Without dead ends: 55 [2021-12-14 11:06:56,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:06:56,894 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:06:56,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 70 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:06:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-14 11:06:56,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2021-12-14 11:06:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 11:06:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2021-12-14 11:06:56,900 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 16 [2021-12-14 11:06:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:06:56,900 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2021-12-14 11:06:56,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:56,901 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2021-12-14 11:06:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 11:06:56,901 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:06:56,902 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:06:56,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 11:06:57,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:06:57,115 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:06:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:06:57,116 INFO L85 PathProgramCache]: Analyzing trace with hash -107558025, now seen corresponding path program 1 times [2021-12-14 11:06:57,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:06:57,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41201423] [2021-12-14 11:06:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:06:57,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:06:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:06:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:06:57,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:06:57,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41201423] [2021-12-14 11:06:57,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41201423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:06:57,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048579184] [2021-12-14 11:06:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:06:57,155 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:06:57,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:06:57,156 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) [2021-12-14 11:06:57,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 11:06:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:06:57,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 11:06:57,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:06:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:06:57,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:06:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:06:57,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048579184] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:06:57,301 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:06:57,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-14 11:06:57,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003404856] [2021-12-14 11:06:57,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:06:57,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 11:06:57,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:06:57,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 11:06:57,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:06:57,304 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:57,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:06:57,409 INFO L93 Difference]: Finished difference Result 151 states and 212 transitions. [2021-12-14 11:06:57,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:06:57,410 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 11:06:57,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:06:57,411 INFO L225 Difference]: With dead ends: 151 [2021-12-14 11:06:57,411 INFO L226 Difference]: Without dead ends: 114 [2021-12-14 11:06:57,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:06:57,413 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 172 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:06:57,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 96 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:06:57,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-12-14 11:06:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-12-14 11:06:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 103 states have internal predecessors, (139), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-14 11:06:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 157 transitions. [2021-12-14 11:06:57,423 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 157 transitions. Word has length 16 [2021-12-14 11:06:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:06:57,423 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 157 transitions. [2021-12-14 11:06:57,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 157 transitions. [2021-12-14 11:06:57,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-14 11:06:57,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:06:57,439 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:06:57,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 11:06:57,654 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,SelfDestructingSolverStorable2 [2021-12-14 11:06:57,655 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:06:57,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:06:57,655 INFO L85 PathProgramCache]: Analyzing trace with hash -2071104259, now seen corresponding path program 2 times [2021-12-14 11:06:57,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:06:57,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373492333] [2021-12-14 11:06:57,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:06:57,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:06:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:06:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 11:06:57,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:06:57,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373492333] [2021-12-14 11:06:57,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373492333] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:06:57,750 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:06:57,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:06:57,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274827592] [2021-12-14 11:06:57,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:06:57,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:06:57,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:06:57,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:06:57,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:06:57,756 INFO L87 Difference]: Start difference. First operand 114 states and 157 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:57,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:06:57,808 INFO L93 Difference]: Finished difference Result 212 states and 294 transitions. [2021-12-14 11:06:57,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:06:57,809 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-14 11:06:57,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:06:57,811 INFO L225 Difference]: With dead ends: 212 [2021-12-14 11:06:57,811 INFO L226 Difference]: Without dead ends: 118 [2021-12-14 11:06:57,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:06:57,815 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 28 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:06:57,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 97 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:06:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-12-14 11:06:57,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2021-12-14 11:06:57,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 104 states have (on average 1.3461538461538463) internal successors, (140), 104 states have internal predecessors, (140), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-14 11:06:57,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 158 transitions. [2021-12-14 11:06:57,835 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 158 transitions. Word has length 22 [2021-12-14 11:06:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:06:57,835 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 158 transitions. [2021-12-14 11:06:57,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:57,835 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 158 transitions. [2021-12-14 11:06:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 11:06:57,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:06:57,837 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:06:57,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 11:06:57,837 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:06:57,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:06:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1079334847, now seen corresponding path program 1 times [2021-12-14 11:06:57,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:06:57,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107672535] [2021-12-14 11:06:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:06:57,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:06:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:06:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-12-14 11:06:57,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:06:57,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107672535] [2021-12-14 11:06:57,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107672535] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:06:57,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074779653] [2021-12-14 11:06:57,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:06:57,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:06:57,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:06:57,914 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) [2021-12-14 11:06:57,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 11:06:57,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:06:57,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 11:06:57,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:06:58,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:06:58,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:06:58,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:06:58,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074779653] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:06:58,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:06:58,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 15 [2021-12-14 11:06:58,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584431615] [2021-12-14 11:06:58,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:06:58,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-14 11:06:58,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:06:58,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-14 11:06:58,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-12-14 11:06:58,124 INFO L87 Difference]: Start difference. First operand 115 states and 158 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:58,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:06:58,347 INFO L93 Difference]: Finished difference Result 376 states and 540 transitions. [2021-12-14 11:06:58,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 11:06:58,348 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-14 11:06:58,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:06:58,349 INFO L225 Difference]: With dead ends: 376 [2021-12-14 11:06:58,349 INFO L226 Difference]: Without dead ends: 272 [2021-12-14 11:06:58,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=179, Unknown=0, NotChecked=0, Total=306 [2021-12-14 11:06:58,350 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 463 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:06:58,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 265 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 11:06:58,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-12-14 11:06:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 265. [2021-12-14 11:06:58,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 242 states have (on average 1.3512396694214877) internal successors, (327), 242 states have internal predecessors, (327), 21 states have call successors, (21), 1 states have call predecessors, (21), 1 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-14 11:06:58,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 369 transitions. [2021-12-14 11:06:58,402 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 369 transitions. Word has length 25 [2021-12-14 11:06:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:06:58,402 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 369 transitions. [2021-12-14 11:06:58,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 369 transitions. [2021-12-14 11:06:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 11:06:58,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:06:58,403 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:06:58,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 11:06:58,616 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 [2021-12-14 11:06:58,617 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:06:58,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:06:58,617 INFO L85 PathProgramCache]: Analyzing trace with hash -34194041, now seen corresponding path program 2 times [2021-12-14 11:06:58,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:06:58,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434014554] [2021-12-14 11:06:58,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:06:58,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:06:58,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:06:58,674 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2021-12-14 11:06:58,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:06:58,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434014554] [2021-12-14 11:06:58,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434014554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:06:58,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:06:58,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:06:58,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684169044] [2021-12-14 11:06:58,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:06:58,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:06:58,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:06:58,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:06:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:06:58,676 INFO L87 Difference]: Start difference. First operand 265 states and 369 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:06:58,703 INFO L93 Difference]: Finished difference Result 485 states and 684 transitions. [2021-12-14 11:06:58,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:06:58,704 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-12-14 11:06:58,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:06:58,705 INFO L225 Difference]: With dead ends: 485 [2021-12-14 11:06:58,705 INFO L226 Difference]: Without dead ends: 260 [2021-12-14 11:06:58,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:06:58,706 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:06:58,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 76 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:06:58,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-12-14 11:06:58,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2021-12-14 11:06:58,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 238 states have (on average 1.3487394957983194) internal successors, (321), 238 states have internal predecessors, (321), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-12-14 11:06:58,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 361 transitions. [2021-12-14 11:06:58,714 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 361 transitions. Word has length 40 [2021-12-14 11:06:58,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:06:58,714 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 361 transitions. [2021-12-14 11:06:58,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 361 transitions. [2021-12-14 11:06:58,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-14 11:06:58,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:06:58,715 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:06:58,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-14 11:06:58,716 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:06:58,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:06:58,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1753085294, now seen corresponding path program 1 times [2021-12-14 11:06:58,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:06:58,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642434527] [2021-12-14 11:06:58,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:06:58,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:06:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:06:58,827 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:06:58,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:06:58,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642434527] [2021-12-14 11:06:58,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642434527] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:06:58,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422798243] [2021-12-14 11:06:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:06:58,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:06:58,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:06:58,829 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) [2021-12-14 11:06:58,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 11:06:58,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:06:58,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 11:06:58,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:06:58,946 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:06:58,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:06:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:06:59,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422798243] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:06:59,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:06:59,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-14 11:06:59,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667574521] [2021-12-14 11:06:59,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:06:59,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 11:06:59,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:06:59,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 11:06:59,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-14 11:06:59,151 INFO L87 Difference]: Start difference. First operand 260 states and 361 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:59,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:06:59,529 INFO L93 Difference]: Finished difference Result 785 states and 1130 transitions. [2021-12-14 11:06:59,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 11:06:59,529 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-14 11:06:59,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:06:59,531 INFO L225 Difference]: With dead ends: 785 [2021-12-14 11:06:59,531 INFO L226 Difference]: Without dead ends: 548 [2021-12-14 11:06:59,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-14 11:06:59,532 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1317 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1360 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 11:06:59,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1360 Valid, 421 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-14 11:06:59,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-12-14 11:06:59,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 548. [2021-12-14 11:06:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 548 states, 502 states have (on average 1.3565737051792828) internal successors, (681), 502 states have internal predecessors, (681), 44 states have call successors, (44), 1 states have call predecessors, (44), 1 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-14 11:06:59,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 548 states to 548 states and 769 transitions. [2021-12-14 11:06:59,546 INFO L78 Accepts]: Start accepts. Automaton has 548 states and 769 transitions. Word has length 41 [2021-12-14 11:06:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:06:59,546 INFO L470 AbstractCegarLoop]: Abstraction has 548 states and 769 transitions. [2021-12-14 11:06:59,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:06:59,546 INFO L276 IsEmpty]: Start isEmpty. Operand 548 states and 769 transitions. [2021-12-14 11:06:59,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-14 11:06:59,547 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:06:59,547 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:06:59,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 11:06:59,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:06:59,767 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:06:59,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:06:59,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1772381526, now seen corresponding path program 2 times [2021-12-14 11:06:59,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:06:59,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885985404] [2021-12-14 11:06:59,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:06:59,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:06:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:07:00,074 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:07:00,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:07:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885985404] [2021-12-14 11:07:00,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885985404] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:07:00,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987391474] [2021-12-14 11:07:00,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:07:00,075 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:07:00,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:07:00,076 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) [2021-12-14 11:07:00,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 11:07:00,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:07:00,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:07:00,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 11:07:00,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:07:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:07:00,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:07:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:07:00,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987391474] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:07:00,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:07:00,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-14 11:07:00,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828051632] [2021-12-14 11:07:00,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:07:00,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-14 11:07:00,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:07:00,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-14 11:07:00,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-14 11:07:00,889 INFO L87 Difference]: Start difference. First operand 548 states and 769 transitions. Second operand has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:07:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:07:01,933 INFO L93 Difference]: Finished difference Result 1625 states and 2354 transitions. [2021-12-14 11:07:01,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-14 11:07:01,934 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-12-14 11:07:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:07:01,937 INFO L225 Difference]: With dead ends: 1625 [2021-12-14 11:07:01,937 INFO L226 Difference]: Without dead ends: 1124 [2021-12-14 11:07:01,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-14 11:07:01,939 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 2690 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2781 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-14 11:07:01,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2781 Valid, 942 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 930 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-14 11:07:01,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2021-12-14 11:07:01,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2021-12-14 11:07:01,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 1030 states have (on average 1.3601941747572817) internal successors, (1401), 1030 states have internal predecessors, (1401), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-14 11:07:01,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1585 transitions. [2021-12-14 11:07:01,965 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1585 transitions. Word has length 65 [2021-12-14 11:07:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:07:01,965 INFO L470 AbstractCegarLoop]: Abstraction has 1124 states and 1585 transitions. [2021-12-14 11:07:01,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.2448979591836733) internal successors, (110), 49 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:07:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1585 transitions. [2021-12-14 11:07:01,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-14 11:07:01,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:07:01,967 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:07:01,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 11:07:02,183 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 [2021-12-14 11:07:02,183 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:07:02,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:07:02,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1315726042, now seen corresponding path program 3 times [2021-12-14 11:07:02,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:07:02,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553896775] [2021-12-14 11:07:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:07:02,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:07:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:07:02,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:07:02,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:07:02,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553896775] [2021-12-14 11:07:02,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553896775] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:07:02,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850689081] [2021-12-14 11:07:02,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:07:02,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:07:02,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:07:02,993 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) [2021-12-14 11:07:02,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 11:07:03,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 11:07:03,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:07:03,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-14 11:07:03,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:07:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2021-12-14 11:07:03,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:07:03,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850689081] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:07:03,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 11:07:03,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [49] total 53 [2021-12-14 11:07:03,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82876942] [2021-12-14 11:07:03,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:07:03,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-14 11:07:03,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:07:03,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-14 11:07:03,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1373, Invalid=1383, Unknown=0, NotChecked=0, Total=2756 [2021-12-14 11:07:03,236 INFO L87 Difference]: Start difference. First operand 1124 states and 1585 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:07:03,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:07:03,300 INFO L93 Difference]: Finished difference Result 2152 states and 3073 transitions. [2021-12-14 11:07:03,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:07:03,301 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-14 11:07:03,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:07:03,305 INFO L225 Difference]: With dead ends: 2152 [2021-12-14 11:07:03,305 INFO L226 Difference]: Without dead ends: 1139 [2021-12-14 11:07:03,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1424, Invalid=1438, Unknown=0, NotChecked=0, Total=2862 [2021-12-14 11:07:03,308 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:07:03,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:07:03,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-12-14 11:07:03,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1126. [2021-12-14 11:07:03,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1126 states, 1032 states have (on average 1.3604651162790697) internal successors, (1404), 1032 states have internal predecessors, (1404), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-14 11:07:03,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1588 transitions. [2021-12-14 11:07:03,334 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1588 transitions. Word has length 113 [2021-12-14 11:07:03,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:07:03,334 INFO L470 AbstractCegarLoop]: Abstraction has 1126 states and 1588 transitions. [2021-12-14 11:07:03,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:07:03,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1588 transitions. [2021-12-14 11:07:03,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-14 11:07:03,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:07:03,335 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:07:03,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-14 11:07:03,569 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 [2021-12-14 11:07:03,569 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:07:03,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:07:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1995784412, now seen corresponding path program 1 times [2021-12-14 11:07:03,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:07:03,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783425971] [2021-12-14 11:07:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:07:03,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:07:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:07:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:07:04,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:07:04,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783425971] [2021-12-14 11:07:04,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783425971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:07:04,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275825769] [2021-12-14 11:07:04,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:07:04,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:07:04,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:07:04,368 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) [2021-12-14 11:07:04,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 11:07:04,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:07:04,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 48 conjunts are in the unsatisfiable core [2021-12-14 11:07:04,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:07:04,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:07:04,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:07:06,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:07:06,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275825769] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:07:06,493 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:07:06,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2021-12-14 11:07:06,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373154404] [2021-12-14 11:07:06,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:07:06,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-12-14 11:07:06,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:07:06,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-12-14 11:07:06,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-14 11:07:06,499 INFO L87 Difference]: Start difference. First operand 1126 states and 1588 transitions. Second operand has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:07:12,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:07:12,125 INFO L93 Difference]: Finished difference Result 3309 states and 4808 transitions. [2021-12-14 11:07:12,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-12-14 11:07:12,126 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2021-12-14 11:07:12,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:07:12,133 INFO L225 Difference]: With dead ends: 3309 [2021-12-14 11:07:12,133 INFO L226 Difference]: Without dead ends: 2278 [2021-12-14 11:07:12,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-12-14 11:07:12,137 INFO L933 BasicCegarLoop]: 234 mSDtfsCounter, 7583 mSDsluCounter, 1394 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 1125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7770 SdHoareTripleChecker+Valid, 1628 SdHoareTripleChecker+Invalid, 3147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1125 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-14 11:07:12,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7770 Valid, 1628 Invalid, 3147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1125 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-14 11:07:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2021-12-14 11:07:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 2278. [2021-12-14 11:07:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2278 states, 2088 states have (on average 1.3620689655172413) internal successors, (2844), 2088 states have internal predecessors, (2844), 188 states have call successors, (188), 1 states have call predecessors, (188), 1 states have return successors, (188), 188 states have call predecessors, (188), 188 states have call successors, (188) [2021-12-14 11:07:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3220 transitions. [2021-12-14 11:07:12,175 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3220 transitions. Word has length 113 [2021-12-14 11:07:12,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:07:12,176 INFO L470 AbstractCegarLoop]: Abstraction has 2278 states and 3220 transitions. [2021-12-14 11:07:12,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.1237113402061856) internal successors, (206), 97 states have internal predecessors, (206), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:07:12,176 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3220 transitions. [2021-12-14 11:07:12,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-14 11:07:12,177 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:07:12,178 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:07:12,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-14 11:07:12,390 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 [2021-12-14 11:07:12,392 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:07:12,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:07:12,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1143828796, now seen corresponding path program 2 times [2021-12-14 11:07:12,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:07:12,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070213843] [2021-12-14 11:07:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:07:12,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:07:12,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:07:15,093 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:07:15,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:07:15,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070213843] [2021-12-14 11:07:15,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070213843] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:07:15,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393027506] [2021-12-14 11:07:15,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:07:15,094 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:07:15,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:07:15,100 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) [2021-12-14 11:07:15,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 11:07:15,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:07:15,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:07:15,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-14 11:07:15,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:07:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:07:15,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:07:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 8841 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 11:07:21,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393027506] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:07:21,735 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:07:21,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97, 97] total 193 [2021-12-14 11:07:21,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899401238] [2021-12-14 11:07:21,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:07:21,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2021-12-14 11:07:21,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:07:21,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2021-12-14 11:07:21,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18528, Invalid=18528, Unknown=0, NotChecked=0, Total=37056 [2021-12-14 11:07:21,751 INFO L87 Difference]: Start difference. First operand 2278 states and 3220 transitions. Second operand has 193 states, 193 states have (on average 2.062176165803109) internal successors, (398), 193 states have internal predecessors, (398), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)