./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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_ground-1.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 5aa72773233f17156d62ec9c7729aefdd69e77cc68e9bdd6e006eaf36895d27a --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 21:38:58,759 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 21:38:58,760 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 21:38:58,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 21:38:58,787 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 21:38:58,787 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 21:38:58,790 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 21:38:58,792 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 21:38:58,794 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 21:38:58,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 21:38:58,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 21:38:58,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 21:38:58,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 21:38:58,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 21:38:58,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 21:38:58,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 21:38:58,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 21:38:58,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 21:38:58,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 21:38:58,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 21:38:58,811 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 21:38:58,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 21:38:58,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 21:38:58,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 21:38:58,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 21:38:58,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 21:38:58,821 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 21:38:58,821 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 21:38:58,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 21:38:58,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 21:38:58,823 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 21:38:58,824 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 21:38:58,825 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 21:38:58,826 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 21:38:58,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 21:38:58,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 21:38:58,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 21:38:58,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 21:38:58,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 21:38:58,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 21:38:58,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 21:38:58,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 21:38:58,831 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 21:38:58,854 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 21:38:58,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 21:38:58,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 21:38:58,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 21:38:58,855 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 21:38:58,855 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 21:38:58,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 21:38:58,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 21:38:58,856 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 21:38:58,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 21:38:58,857 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 21:38:58,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 21:38:58,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 21:38:58,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 21:38:58,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 21:38:58,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 21:38:58,858 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 21:38:58,858 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 21:38:58,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 21:38:58,858 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 21:38:58,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 21:38:58,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 21:38:58,859 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 21:38:58,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 21:38:58,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 21:38:58,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 21:38:58,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 21:38:58,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 21:38:58,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 21:38:58,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 21:38:58,860 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 21:38:58,860 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 21:38:58,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 21:38:58,860 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5aa72773233f17156d62ec9c7729aefdd69e77cc68e9bdd6e006eaf36895d27a [2022-07-11 21:38:59,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 21:38:59,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 21:38:59,065 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 21:38:59,065 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 21:38:59,066 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 21:38:59,067 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2022-07-11 21:38:59,112 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bebf8ddb4/6171ab6e0ad846b0a496d42eb84bd33e/FLAG3a75628fd [2022-07-11 21:38:59,455 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 21:38:59,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/sorting_selectionsort_ground-1.i [2022-07-11 21:38:59,465 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bebf8ddb4/6171ab6e0ad846b0a496d42eb84bd33e/FLAG3a75628fd [2022-07-11 21:38:59,879 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bebf8ddb4/6171ab6e0ad846b0a496d42eb84bd33e [2022-07-11 21:38:59,881 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 21:38:59,882 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 21:38:59,884 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 21:38:59,884 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 21:38:59,888 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 21:38:59,888 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 09:38:59" (1/1) ... [2022-07-11 21:38:59,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15cc0af1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:38:59, skipping insertion in model container [2022-07-11 21:38:59,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 09:38:59" (1/1) ... [2022-07-11 21:38:59,893 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 21:38:59,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 21:39:00,009 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_ground-1.i[823,836] [2022-07-11 21:39:00,022 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 21:39:00,027 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 21:39:00,034 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_ground-1.i[823,836] [2022-07-11 21:39:00,041 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 21:39:00,049 INFO L208 MainTranslator]: Completed translation [2022-07-11 21:39:00,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:39:00 WrapperNode [2022-07-11 21:39:00,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 21:39:00,051 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 21:39:00,051 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 21:39:00,051 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 21:39:00,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:39:00" (1/1) ... [2022-07-11 21:39:00,060 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:39:00" (1/1) ... [2022-07-11 21:39:00,080 INFO L137 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 114 [2022-07-11 21:39:00,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 21:39:00,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 21:39:00,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 21:39:00,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 21:39:00,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:39:00" (1/1) ... [2022-07-11 21:39:00,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:39:00" (1/1) ... [2022-07-11 21:39:00,091 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:39:00" (1/1) ... [2022-07-11 21:39:00,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:39:00" (1/1) ... [2022-07-11 21:39:00,106 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:39:00" (1/1) ... [2022-07-11 21:39:00,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:39:00" (1/1) ... [2022-07-11 21:39:00,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:39:00" (1/1) ... [2022-07-11 21:39:00,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 21:39:00,119 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 21:39:00,120 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 21:39:00,120 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 21:39:00,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:39:00" (1/1) ... [2022-07-11 21:39:00,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 21:39:00,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:39:00,151 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 21:39:00,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 21:39:00,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 21:39:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 21:39:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 21:39:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 21:39:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 21:39:00,184 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 21:39:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 21:39:00,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-11 21:39:00,185 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-11 21:39:00,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 21:39:00,246 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 21:39:00,247 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 21:39:00,460 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 21:39:00,480 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 21:39:00,480 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-07-11 21:39:00,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 09:39:00 BoogieIcfgContainer [2022-07-11 21:39:00,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 21:39:00,483 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 21:39:00,483 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 21:39:00,486 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 21:39:00,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 09:38:59" (1/3) ... [2022-07-11 21:39:00,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397dc9b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 09:39:00, skipping insertion in model container [2022-07-11 21:39:00,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 09:39:00" (2/3) ... [2022-07-11 21:39:00,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@397dc9b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 09:39:00, skipping insertion in model container [2022-07-11 21:39:00,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 09:39:00" (3/3) ... [2022-07-11 21:39:00,488 INFO L111 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2022-07-11 21:39:00,501 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 21:39:00,501 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 21:39:00,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 21:39:00,579 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5185116f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5f0be4c9 [2022-07-11 21:39:00,579 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 21:39:00,589 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) [2022-07-11 21:39:00,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-11 21:39:00,598 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:00,598 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:00,599 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:00,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:00,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1922481208, now seen corresponding path program 1 times [2022-07-11 21:39:00,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:00,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193419073] [2022-07-11 21:39:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:00,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:00,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 21:39:00,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:00,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193419073] [2022-07-11 21:39:00,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193419073] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 21:39:00,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 21:39:00,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 21:39:00,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868563741] [2022-07-11 21:39:00,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 21:39:00,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 21:39:00,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:00,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 21:39:00,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 21:39:00,771 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) [2022-07-11 21:39:00,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:00,809 INFO L93 Difference]: Finished difference Result 78 states and 121 transitions. [2022-07-11 21:39:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 21:39:00,812 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 [2022-07-11 21:39:00,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:00,820 INFO L225 Difference]: With dead ends: 78 [2022-07-11 21:39:00,820 INFO L226 Difference]: Without dead ends: 38 [2022-07-11 21:39:00,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 21:39:00,834 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 1 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:00,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 96 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:39:00,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-11 21:39:00,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-07-11 21:39:00,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 32 states have internal predecessors, (42), 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) [2022-07-11 21:39:00,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-07-11 21:39:00,870 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 12 [2022-07-11 21:39:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:00,871 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-07-11 21:39:00,872 INFO L496 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) [2022-07-11 21:39:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-07-11 21:39:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-11 21:39:00,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:00,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:00,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 21:39:00,874 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:00,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:00,875 INFO L85 PathProgramCache]: Analyzing trace with hash -326095532, now seen corresponding path program 1 times [2022-07-11 21:39:00,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:00,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538616593] [2022-07-11 21:39:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:00,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:00,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:00,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 21:39:00,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:00,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538616593] [2022-07-11 21:39:00,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538616593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:39:00,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203558007] [2022-07-11 21:39:00,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:00,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:00,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:39:00,951 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 21:39:00,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 21:39:01,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:01,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 21:39:01,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:39:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:39:01,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 21:39:01,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203558007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 21:39:01,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 21:39:01,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-11 21:39:01,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914938526] [2022-07-11 21:39:01,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 21:39:01,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 21:39:01,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:01,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 21:39:01,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 21:39:01,041 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-07-11 21:39:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:01,083 INFO L93 Difference]: Finished difference Result 68 states and 89 transitions. [2022-07-11 21:39:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 21:39:01,084 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 14 [2022-07-11 21:39:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:01,087 INFO L225 Difference]: With dead ends: 68 [2022-07-11 21:39:01,087 INFO L226 Difference]: Without dead ends: 55 [2022-07-11 21:39:01,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 21:39:01,090 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 24 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:01,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 72 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:39:01,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-11 21:39:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 38. [2022-07-11 21:39:01,102 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) [2022-07-11 21:39:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2022-07-11 21:39:01,109 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 14 [2022-07-11 21:39:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:01,109 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2022-07-11 21:39:01,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2022-07-11 21:39:01,110 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2022-07-11 21:39:01,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-11 21:39:01,111 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:01,112 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:01,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 21:39:01,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:01,334 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:01,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:01,334 INFO L85 PathProgramCache]: Analyzing trace with hash -916904651, now seen corresponding path program 1 times [2022-07-11 21:39:01,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:01,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128659106] [2022-07-11 21:39:01,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:01,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:01,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 21:39:01,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:01,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128659106] [2022-07-11 21:39:01,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128659106] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:39:01,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014653674] [2022-07-11 21:39:01,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:01,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:01,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:39:01,374 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 21:39:01,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 21:39:01,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:01,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 21:39:01,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:39:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 21:39:01,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:39:01,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 21:39:01,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014653674] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:39:01,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:39:01,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-11 21:39:01,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949042080] [2022-07-11 21:39:01,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:39:01,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 21:39:01,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:01,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 21:39:01,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-11 21:39:01,484 INFO L87 Difference]: Start difference. First operand 38 states and 49 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) [2022-07-11 21:39:01,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:01,518 INFO L93 Difference]: Finished difference Result 77 states and 101 transitions. [2022-07-11 21:39:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 21:39:01,521 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 [2022-07-11 21:39:01,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:01,521 INFO L225 Difference]: With dead ends: 77 [2022-07-11 21:39:01,522 INFO L226 Difference]: Without dead ends: 44 [2022-07-11 21:39:01,522 INFO L412 NwaCegarLoop]: 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 [2022-07-11 21:39:01,524 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:01,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 88 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:39:01,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-11 21:39:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-11 21:39:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 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) [2022-07-11 21:39:01,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2022-07-11 21:39:01,533 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 16 [2022-07-11 21:39:01,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:01,534 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2022-07-11 21:39:01,534 INFO L496 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) [2022-07-11 21:39:01,534 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2022-07-11 21:39:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-11 21:39:01,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:01,535 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:01,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-11 21:39:01,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-11 21:39:01,754 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:01,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:01,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1414516411, now seen corresponding path program 2 times [2022-07-11 21:39:01,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:01,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265003092] [2022-07-11 21:39:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:01,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:01,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-11 21:39:01,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:01,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265003092] [2022-07-11 21:39:01,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265003092] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 21:39:01,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 21:39:01,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 21:39:01,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415086927] [2022-07-11 21:39:01,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 21:39:01,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 21:39:01,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:01,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 21:39:01,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 21:39:01,830 INFO L87 Difference]: Start difference. First operand 44 states and 55 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) [2022-07-11 21:39:01,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:01,864 INFO L93 Difference]: Finished difference Result 95 states and 126 transitions. [2022-07-11 21:39:01,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 21:39:01,865 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 [2022-07-11 21:39:01,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:01,865 INFO L225 Difference]: With dead ends: 95 [2022-07-11 21:39:01,865 INFO L226 Difference]: Without dead ends: 64 [2022-07-11 21:39:01,866 INFO L412 NwaCegarLoop]: 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 [2022-07-11 21:39:01,866 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:01,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 81 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:39:01,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-11 21:39:01,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2022-07-11 21:39:01,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 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) [2022-07-11 21:39:01,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 56 transitions. [2022-07-11 21:39:01,871 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 56 transitions. Word has length 22 [2022-07-11 21:39:01,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:01,871 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 56 transitions. [2022-07-11 21:39:01,872 INFO L496 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) [2022-07-11 21:39:01,872 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 56 transitions. [2022-07-11 21:39:01,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-11 21:39:01,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:01,873 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:01,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-11 21:39:01,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:01,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:01,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1079334847, now seen corresponding path program 1 times [2022-07-11 21:39:01,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:01,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853222340] [2022-07-11 21:39:01,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:01,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:01,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-11 21:39:01,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:01,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853222340] [2022-07-11 21:39:01,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853222340] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 21:39:01,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 21:39:01,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 21:39:01,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600321165] [2022-07-11 21:39:01,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 21:39:01,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 21:39:01,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:01,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 21:39:01,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-11 21:39:01,934 INFO L87 Difference]: Start difference. First operand 45 states and 56 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) [2022-07-11 21:39:01,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:01,959 INFO L93 Difference]: Finished difference Result 92 states and 121 transitions. [2022-07-11 21:39:01,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 21:39:01,960 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 25 [2022-07-11 21:39:01,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:01,960 INFO L225 Difference]: With dead ends: 92 [2022-07-11 21:39:01,960 INFO L226 Difference]: Without dead ends: 61 [2022-07-11 21:39:01,961 INFO L412 NwaCegarLoop]: 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 [2022-07-11 21:39:01,961 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 17 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:01,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:39:01,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-07-11 21:39:01,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2022-07-11 21:39:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 48 states have internal predecessors, (61), 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) [2022-07-11 21:39:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2022-07-11 21:39:01,966 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 25 [2022-07-11 21:39:01,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:01,966 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2022-07-11 21:39:01,966 INFO L496 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) [2022-07-11 21:39:01,966 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2022-07-11 21:39:01,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-11 21:39:01,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:01,967 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:01,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 21:39:01,967 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:01,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:01,968 INFO L85 PathProgramCache]: Analyzing trace with hash -581508620, now seen corresponding path program 1 times [2022-07-11 21:39:01,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:01,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81183980] [2022-07-11 21:39:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:01,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:02,034 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:39:02,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:02,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81183980] [2022-07-11 21:39:02,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81183980] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:39:02,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338807904] [2022-07-11 21:39:02,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:02,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:02,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:39:02,037 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 21:39:02,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 21:39:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:02,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 21:39:02,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:39:02,102 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:39:02,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:39:02,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:39:02,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338807904] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:39:02,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:39:02,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-11 21:39:02,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017110542] [2022-07-11 21:39:02,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:39:02,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-11 21:39:02,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:02,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-11 21:39:02,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-11 21:39:02,146 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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) [2022-07-11 21:39:02,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:02,179 INFO L93 Difference]: Finished difference Result 107 states and 140 transitions. [2022-07-11 21:39:02,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 21:39:02,180 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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 26 [2022-07-11 21:39:02,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:02,181 INFO L225 Difference]: With dead ends: 107 [2022-07-11 21:39:02,181 INFO L226 Difference]: Without dead ends: 65 [2022-07-11 21:39:02,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-11 21:39:02,182 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:02,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 131 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:39:02,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-11 21:39:02,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-07-11 21:39:02,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.2166666666666666) internal successors, (73), 60 states have internal predecessors, (73), 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) [2022-07-11 21:39:02,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 79 transitions. [2022-07-11 21:39:02,186 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 79 transitions. Word has length 26 [2022-07-11 21:39:02,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:02,187 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 79 transitions. [2022-07-11 21:39:02,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 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) [2022-07-11 21:39:02,187 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 79 transitions. [2022-07-11 21:39:02,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-11 21:39:02,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:02,188 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:02,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 21:39:02,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:02,424 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:02,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:02,424 INFO L85 PathProgramCache]: Analyzing trace with hash -772621952, now seen corresponding path program 2 times [2022-07-11 21:39:02,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:02,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099645625] [2022-07-11 21:39:02,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:02,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:02,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-11 21:39:02,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:02,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099645625] [2022-07-11 21:39:02,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099645625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:39:02,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166639626] [2022-07-11 21:39:02,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 21:39:02,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:02,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:39:02,544 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 21:39:02,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 21:39:02,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-11 21:39:02,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:39:02,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-11 21:39:02,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:39:02,709 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 21:39:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2022-07-11 21:39:02,738 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 21:39:02,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166639626] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 21:39:02,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-11 21:39:02,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [13] total 19 [2022-07-11 21:39:02,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001367462] [2022-07-11 21:39:02,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 21:39:02,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-11 21:39:02,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:02,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-11 21:39:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-11 21:39:02,740 INFO L87 Difference]: Start difference. First operand 65 states and 79 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-07-11 21:39:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:02,833 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2022-07-11 21:39:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 21:39:02,834 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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 38 [2022-07-11 21:39:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:02,835 INFO L225 Difference]: With dead ends: 79 [2022-07-11 21:39:02,835 INFO L226 Difference]: Without dead ends: 77 [2022-07-11 21:39:02,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2022-07-11 21:39:02,836 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 66 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:02,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 169 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 21:39:02,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-11 21:39:02,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2022-07-11 21:39:02,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-11 21:39:02,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 84 transitions. [2022-07-11 21:39:02,841 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 84 transitions. Word has length 38 [2022-07-11 21:39:02,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:02,841 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 84 transitions. [2022-07-11 21:39:02,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 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) [2022-07-11 21:39:02,841 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 84 transitions. [2022-07-11 21:39:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-11 21:39:02,842 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:02,842 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:02,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 21:39:03,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:03,048 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:03,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:03,048 INFO L85 PathProgramCache]: Analyzing trace with hash -602796711, now seen corresponding path program 1 times [2022-07-11 21:39:03,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:03,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146166629] [2022-07-11 21:39:03,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:03,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:03,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-11 21:39:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:39:03,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:03,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146166629] [2022-07-11 21:39:03,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146166629] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:39:03,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782275099] [2022-07-11 21:39:03,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:03,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:03,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:39:03,150 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 21:39:03,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 21:39:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:03,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 21:39:03,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:39:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 21:39:03,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:39:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:39:03,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782275099] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:39:03,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:39:03,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-11 21:39:03,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825843033] [2022-07-11 21:39:03,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:39:03,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 21:39:03,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:03,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 21:39:03,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-11 21:39:03,417 INFO L87 Difference]: Start difference. First operand 70 states and 84 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:39:03,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:03,471 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2022-07-11 21:39:03,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 21:39:03,472 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-07-11 21:39:03,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:03,473 INFO L225 Difference]: With dead ends: 141 [2022-07-11 21:39:03,473 INFO L226 Difference]: Without dead ends: 94 [2022-07-11 21:39:03,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-11 21:39:03,474 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:03,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 174 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 21:39:03,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-11 21:39:03,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-07-11 21:39:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 87 states have (on average 1.1494252873563218) internal successors, (100), 88 states have internal predecessors, (100), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-11 21:39:03,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2022-07-11 21:39:03,480 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 46 [2022-07-11 21:39:03,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:03,480 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2022-07-11 21:39:03,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:39:03,481 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2022-07-11 21:39:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-11 21:39:03,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:03,482 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:03,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 21:39:03,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:03,698 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:03,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1736618383, now seen corresponding path program 2 times [2022-07-11 21:39:03,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:03,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452060337] [2022-07-11 21:39:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:03,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:03,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-11 21:39:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:39:03,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:03,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452060337] [2022-07-11 21:39:03,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452060337] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:39:03,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865909011] [2022-07-11 21:39:03,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 21:39:03,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:03,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:39:03,936 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 21:39:03,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 21:39:04,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 21:39:04,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:39:04,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-11 21:39:04,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:39:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 21:39:04,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:39:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:39:04,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865909011] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:39:04,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:39:04,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-07-11 21:39:04,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440565198] [2022-07-11 21:39:04,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:39:04,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-11 21:39:04,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:04,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-11 21:39:04,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-11 21:39:04,659 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:39:04,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:04,773 INFO L93 Difference]: Finished difference Result 189 states and 240 transitions. [2022-07-11 21:39:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-11 21:39:04,773 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 70 [2022-07-11 21:39:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:04,774 INFO L225 Difference]: With dead ends: 189 [2022-07-11 21:39:04,774 INFO L226 Difference]: Without dead ends: 142 [2022-07-11 21:39:04,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2022-07-11 21:39:04,775 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 46 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:04,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 260 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 21:39:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-07-11 21:39:04,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-07-11 21:39:04,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 136 states have internal predecessors, (148), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-11 21:39:04,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2022-07-11 21:39:04,782 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 70 [2022-07-11 21:39:04,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:04,783 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2022-07-11 21:39:04,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.3877551020408165) internal successors, (117), 49 states have internal predecessors, (117), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:39:04,783 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2022-07-11 21:39:04,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-11 21:39:04,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:04,784 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:04,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 21:39:04,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:04,999 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:04,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:04,999 INFO L85 PathProgramCache]: Analyzing trace with hash 728266913, now seen corresponding path program 3 times [2022-07-11 21:39:04,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:04,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53871422] [2022-07-11 21:39:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:05,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:05,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-07-11 21:39:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 2116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:39:05,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:05,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53871422] [2022-07-11 21:39:05,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53871422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:39:05,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276092736] [2022-07-11 21:39:05,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 21:39:05,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:05,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:39:05,860 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 21:39:05,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 21:39:05,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-11 21:39:05,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:39:05,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-11 21:39:05,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:39:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2120 trivial. 0 not checked. [2022-07-11 21:39:05,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:39:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2121 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2118 trivial. 0 not checked. [2022-07-11 21:39:06,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276092736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:39:06,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:39:06,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 51 [2022-07-11 21:39:06,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371727481] [2022-07-11 21:39:06,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:39:06,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-11 21:39:06,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:06,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-11 21:39:06,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1180, Invalid=1370, Unknown=0, NotChecked=0, Total=2550 [2022-07-11 21:39:06,005 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:39:06,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:06,180 INFO L93 Difference]: Finished difference Result 218 states and 258 transitions. [2022-07-11 21:39:06,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-11 21:39:06,181 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 118 [2022-07-11 21:39:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:06,182 INFO L225 Difference]: With dead ends: 218 [2022-07-11 21:39:06,182 INFO L226 Difference]: Without dead ends: 171 [2022-07-11 21:39:06,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1184, Invalid=1468, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 21:39:06,184 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 90 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:06,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 353 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 21:39:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-11 21:39:06,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 152. [2022-07-11 21:39:06,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 146 states have internal predecessors, (162), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-11 21:39:06,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 170 transitions. [2022-07-11 21:39:06,191 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 170 transitions. Word has length 118 [2022-07-11 21:39:06,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:06,191 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 170 transitions. [2022-07-11 21:39:06,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 51 states have internal predecessors, (127), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:39:06,192 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 170 transitions. [2022-07-11 21:39:06,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-07-11 21:39:06,193 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:06,193 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:06,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 21:39:06,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:06,407 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:06,408 INFO L85 PathProgramCache]: Analyzing trace with hash -870454239, now seen corresponding path program 1 times [2022-07-11 21:39:06,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:06,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009350807] [2022-07-11 21:39:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:06,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:06,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:07,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-07-11 21:39:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:07,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:39:07,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:07,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009350807] [2022-07-11 21:39:07,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009350807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:39:07,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890457555] [2022-07-11 21:39:07,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:07,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:07,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:39:07,202 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 21:39:07,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 21:39:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:07,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-11 21:39:07,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:39:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 21:39:07,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:39:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 2209 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:39:09,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890457555] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:39:09,489 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:39:09,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-07-11 21:39:09,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248942241] [2022-07-11 21:39:09,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:39:09,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-11 21:39:09,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:09,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-11 21:39:09,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2022-07-11 21:39:09,494 INFO L87 Difference]: Start difference. First operand 152 states and 170 transitions. Second operand has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:39:09,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:09,715 INFO L93 Difference]: Finished difference Result 305 states and 389 transitions. [2022-07-11 21:39:09,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-11 21:39:09,715 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 120 [2022-07-11 21:39:09,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:09,717 INFO L225 Difference]: With dead ends: 305 [2022-07-11 21:39:09,717 INFO L226 Difference]: Without dead ends: 250 [2022-07-11 21:39:09,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2022-07-11 21:39:09,720 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 96 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:09,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 303 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 21:39:09,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-07-11 21:39:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-07-11 21:39:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 243 states have (on average 1.0699588477366255) internal successors, (260), 244 states have internal predecessors, (260), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-11 21:39:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 268 transitions. [2022-07-11 21:39:09,731 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 268 transitions. Word has length 120 [2022-07-11 21:39:09,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:09,731 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 268 transitions. [2022-07-11 21:39:09,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.191919191919192) internal successors, (217), 99 states have internal predecessors, (217), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:39:09,732 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 268 transitions. [2022-07-11 21:39:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-07-11 21:39:09,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:09,733 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:09,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-11 21:39:09,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-11 21:39:09,948 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:09,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:09,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1106180221, now seen corresponding path program 2 times [2022-07-11 21:39:09,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:09,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599805182] [2022-07-11 21:39:09,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:09,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:12,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-07-11 21:39:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:39:12,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:12,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599805182] [2022-07-11 21:39:12,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599805182] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:39:12,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119248536] [2022-07-11 21:39:12,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 21:39:12,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:12,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:39:12,736 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 21:39:12,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 21:39:12,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 21:39:12,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:39:12,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 965 conjuncts, 98 conjunts are in the unsatisfiable core [2022-07-11 21:39:12,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:39:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 21:39:13,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:39:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9221 backedges. 2 proven. 9216 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:39:20,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119248536] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:39:20,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:39:20,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99, 99] total 197 [2022-07-11 21:39:20,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784076395] [2022-07-11 21:39:20,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:39:20,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2022-07-11 21:39:20,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:20,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2022-07-11 21:39:20,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2022-07-11 21:39:20,800 INFO L87 Difference]: Start difference. First operand 250 states and 268 transitions. Second operand has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:39:21,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:21,368 INFO L93 Difference]: Finished difference Result 501 states and 634 transitions. [2022-07-11 21:39:21,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-07-11 21:39:21,368 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 218 [2022-07-11 21:39:21,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:21,370 INFO L225 Difference]: With dead ends: 501 [2022-07-11 21:39:21,370 INFO L226 Difference]: Without dead ends: 446 [2022-07-11 21:39:21,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 340 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=19306, Invalid=19306, Unknown=0, NotChecked=0, Total=38612 [2022-07-11 21:39:21,373 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 291 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:21,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 174 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 21:39:21,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-07-11 21:39:21,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 446. [2022-07-11 21:39:21,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 439 states have (on average 1.0387243735763099) internal successors, (456), 440 states have internal predecessors, (456), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-11 21:39:21,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 464 transitions. [2022-07-11 21:39:21,387 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 464 transitions. Word has length 218 [2022-07-11 21:39:21,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:21,388 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 464 transitions. [2022-07-11 21:39:21,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 2.0964467005076144) internal successors, (413), 197 states have internal predecessors, (413), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:39:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 464 transitions. [2022-07-11 21:39:21,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-07-11 21:39:21,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:21,392 INFO L195 NwaCegarLoop]: trace histogram [194, 194, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:21,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 21:39:21,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:21,609 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:21,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:21,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1565186873, now seen corresponding path program 3 times [2022-07-11 21:39:21,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:21,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246533467] [2022-07-11 21:39:21,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:21,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:32,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2022-07-11 21:39:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 2 proven. 37636 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 21:39:32,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:32,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246533467] [2022-07-11 21:39:32,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246533467] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:39:32,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376581057] [2022-07-11 21:39:32,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 21:39:32,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:32,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:39:32,147 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 21:39:32,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 21:39:32,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-11 21:39:32,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:39:32,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 21:39:32,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:39:32,509 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37640 trivial. 0 not checked. [2022-07-11 21:39:32,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:39:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 37641 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 37638 trivial. 0 not checked. [2022-07-11 21:39:32,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376581057] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:39:32,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:39:32,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [197, 5, 5] total 203 [2022-07-11 21:39:32,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541102026] [2022-07-11 21:39:32,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:39:32,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-07-11 21:39:32,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:39:32,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-07-11 21:39:32,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19325, Invalid=21681, Unknown=0, NotChecked=0, Total=41006 [2022-07-11 21:39:32,714 INFO L87 Difference]: Start difference. First operand 446 states and 464 transitions. Second operand has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:39:45,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:39:45,206 INFO L93 Difference]: Finished difference Result 554 states and 618 transitions. [2022-07-11 21:39:45,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2022-07-11 21:39:45,206 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 414 [2022-07-11 21:39:45,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:39:45,215 INFO L225 Difference]: With dead ends: 554 [2022-07-11 21:39:45,215 INFO L226 Difference]: Without dead ends: 499 [2022-07-11 21:39:45,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1226 GetRequests, 824 SyntacticMatches, 0 SemanticMatches, 402 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21463 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=58179, Invalid=104633, Unknown=0, NotChecked=0, Total=162812 [2022-07-11 21:39:45,241 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 692 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 21:39:45,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 248 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-11 21:39:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2022-07-11 21:39:45,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 477. [2022-07-11 21:39:45,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 469 states have (on average 1.0511727078891258) internal successors, (493), 470 states have internal predecessors, (493), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-11 21:39:45,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 503 transitions. [2022-07-11 21:39:45,255 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 503 transitions. Word has length 414 [2022-07-11 21:39:45,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:39:45,255 INFO L495 AbstractCegarLoop]: Abstraction has 477 states and 503 transitions. [2022-07-11 21:39:45,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.1083743842364533) internal successors, (428), 203 states have internal predecessors, (428), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:39:45,256 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 503 transitions. [2022-07-11 21:39:45,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2022-07-11 21:39:45,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:39:45,259 INFO L195 NwaCegarLoop]: trace histogram [195, 195, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:39:45,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 21:39:45,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-11 21:39:45,481 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:39:45,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:39:45,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1055751507, now seen corresponding path program 4 times [2022-07-11 21:39:45,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:39:45,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895276567] [2022-07-11 21:39:45,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:39:45,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:39:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:55,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 413 [2022-07-11 21:39:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:39:55,853 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 2 proven. 38025 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 21:39:55,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:39:55,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895276567] [2022-07-11 21:39:55,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895276567] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:39:55,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2819543] [2022-07-11 21:39:55,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 21:39:55,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:39:55,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:39:55,854 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 21:39:55,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 21:39:56,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 21:39:56,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 21:39:56,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 197 conjunts are in the unsatisfiable core [2022-07-11 21:39:56,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 21:39:56,677 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 0 proven. 38025 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-11 21:39:56,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 21:40:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 38051 backedges. 2 proven. 38025 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 21:40:27,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2819543] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 21:40:27,332 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 21:40:27,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [198, 198, 198] total 395 [2022-07-11 21:40:27,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563174195] [2022-07-11 21:40:27,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 21:40:27,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 395 states [2022-07-11 21:40:27,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 21:40:27,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 395 interpolants. [2022-07-11 21:40:27,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2022-07-11 21:40:27,349 INFO L87 Difference]: Start difference. First operand 477 states and 503 transitions. Second operand has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:40:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 21:40:29,531 INFO L93 Difference]: Finished difference Result 955 states and 1203 transitions. [2022-07-11 21:40:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 394 states. [2022-07-11 21:40:29,532 INFO L78 Accepts]: Start accepts. Automaton has has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 425 [2022-07-11 21:40:29,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 21:40:29,534 INFO L225 Difference]: With dead ends: 955 [2022-07-11 21:40:29,534 INFO L226 Difference]: Without dead ends: 871 [2022-07-11 21:40:29,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1048 GetRequests, 655 SyntacticMatches, 0 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 40.1s TimeCoverageRelationStatistics Valid=77815, Invalid=77815, Unknown=0, NotChecked=0, Total=155630 [2022-07-11 21:40:29,544 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 588 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 21:40:29,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 561 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 21:40:29,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-07-11 21:40:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 871. [2022-07-11 21:40:29,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 863 states have (on average 1.0278099652375434) internal successors, (887), 864 states have internal predecessors, (887), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-11 21:40:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 897 transitions. [2022-07-11 21:40:29,567 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 897 transitions. Word has length 425 [2022-07-11 21:40:29,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 21:40:29,568 INFO L495 AbstractCegarLoop]: Abstraction has 871 states and 897 transitions. [2022-07-11 21:40:29,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 395 states, 395 states have (on average 2.0481012658227846) internal successors, (809), 395 states have internal predecessors, (809), 1 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 21:40:29,568 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 897 transitions. [2022-07-11 21:40:29,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2022-07-11 21:40:29,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 21:40:29,575 INFO L195 NwaCegarLoop]: trace histogram [392, 392, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 21:40:29,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 21:40:29,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-11 21:40:29,784 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 21:40:29,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 21:40:29,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2116101367, now seen corresponding path program 5 times [2022-07-11 21:40:29,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 21:40:29,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345909641] [2022-07-11 21:40:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 21:40:29,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 21:40:30,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:41:11,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 807 [2022-07-11 21:41:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 21:41:11,510 INFO L134 CoverageAnalysis]: Checked inductivity of 153690 backedges. 2 proven. 153664 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 21:41:11,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 21:41:11,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345909641] [2022-07-11 21:41:11,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345909641] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 21:41:11,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218387936] [2022-07-11 21:41:11,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 21:41:11,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 21:41:11,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 21:41:11,511 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 21:41:11,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process