./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 22:32:16,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 22:32:16,831 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 22:32:16,853 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 22:32:16,854 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 22:32:16,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 22:32:16,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 22:32:16,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 22:32:16,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 22:32:16,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 22:32:16,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 22:32:16,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 22:32:16,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 22:32:16,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 22:32:16,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 22:32:16,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 22:32:16,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 22:32:16,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 22:32:16,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 22:32:16,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 22:32:16,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 22:32:16,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 22:32:16,872 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 22:32:16,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 22:32:16,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 22:32:16,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 22:32:16,879 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 22:32:16,880 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 22:32:16,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 22:32:16,881 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 22:32:16,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 22:32:16,882 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 22:32:16,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 22:32:16,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 22:32:16,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 22:32:16,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 22:32:16,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 22:32:16,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 22:32:16,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 22:32:16,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 22:32:16,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 22:32:16,887 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 22:32:16,904 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 22:32:16,904 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 22:32:16,905 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 22:32:16,905 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 22:32:16,906 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 22:32:16,906 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 22:32:16,906 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 22:32:16,907 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 22:32:16,907 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 22:32:16,907 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 22:32:16,907 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 22:32:16,908 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 22:32:16,908 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 22:32:16,908 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 22:32:16,908 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 22:32:16,909 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 22:32:16,909 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 22:32:16,909 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 22:32:16,909 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 22:32:16,909 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 22:32:16,911 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 22:32:16,911 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 22:32:16,911 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 22:32:16,912 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 22:32:16,912 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:32:16,912 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 22:32:16,912 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 22:32:16,913 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 22:32:16,913 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 22:32:16,913 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 22:32:16,913 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 22:32:16,914 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 22:32:16,914 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 22:32:16,914 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 22:32:16,914 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 22:32:16,915 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c9ff936057be59b0f479a8c37fd17409fe797633e9a8a05703f5728379735d91 [2023-02-14 22:32:17,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 22:32:17,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 22:32:17,156 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 22:32:17,157 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 22:32:17,158 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 22:32:17,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2023-02-14 22:32:18,352 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 22:32:18,529 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 22:32:18,529 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c [2023-02-14 22:32:18,538 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ececad509/a77560d20a0f40ec853e0da811cfea90/FLAG1b85c7a53 [2023-02-14 22:32:18,548 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ececad509/a77560d20a0f40ec853e0da811cfea90 [2023-02-14 22:32:18,549 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 22:32:18,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 22:32:18,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 22:32:18,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 22:32:18,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 22:32:18,554 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,555 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb3cc38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18, skipping insertion in model container [2023-02-14 22:32:18,555 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 22:32:18,582 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 22:32:18,682 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2023-02-14 22:32:18,726 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:32:18,734 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 22:32:18,745 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector/soft_float_1-2a.c.cil.c[755,768] [2023-02-14 22:32:18,780 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 22:32:18,791 INFO L208 MainTranslator]: Completed translation [2023-02-14 22:32:18,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18 WrapperNode [2023-02-14 22:32:18,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 22:32:18,792 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 22:32:18,792 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 22:32:18,792 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 22:32:18,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,831 INFO L138 Inliner]: procedures = 17, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 202 [2023-02-14 22:32:18,831 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 22:32:18,832 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 22:32:18,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 22:32:18,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 22:32:18,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,852 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,854 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,858 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 22:32:18,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 22:32:18,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 22:32:18,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 22:32:18,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18" (1/1) ... [2023-02-14 22:32:18,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 22:32:18,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:18,897 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 22:32:18,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 22:32:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 22:32:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 22:32:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2023-02-14 22:32:18,939 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2023-02-14 22:32:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 22:32:18,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 22:32:18,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 22:32:18,941 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 22:32:19,032 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 22:32:19,039 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 22:32:19,428 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 22:32:19,461 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 22:32:19,461 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 22:32:19,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:32:19 BoogieIcfgContainer [2023-02-14 22:32:19,463 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 22:32:19,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 22:32:19,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 22:32:19,477 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 22:32:19,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:32:18" (1/3) ... [2023-02-14 22:32:19,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4a81af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:32:19, skipping insertion in model container [2023-02-14 22:32:19,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:32:18" (2/3) ... [2023-02-14 22:32:19,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b4a81af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:32:19, skipping insertion in model container [2023-02-14 22:32:19,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:32:19" (3/3) ... [2023-02-14 22:32:19,480 INFO L112 eAbstractionObserver]: Analyzing ICFG soft_float_1-2a.c.cil.c [2023-02-14 22:32:19,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 22:32:19,508 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 22:32:19,548 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 22:32:19,553 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@354996b4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 22:32:19,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 22:32:19,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 94 states, 82 states have (on average 1.6341463414634145) internal successors, (134), 85 states have internal predecessors, (134), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-14 22:32:19,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-14 22:32:19,563 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:19,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:19,564 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:19,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash 127305957, now seen corresponding path program 1 times [2023-02-14 22:32:19,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:19,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934492435] [2023-02-14 22:32:19,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:19,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:19,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:19,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:19,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:19,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:19,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:19,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934492435] [2023-02-14 22:32:19,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934492435] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:19,844 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:19,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 22:32:19,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697171310] [2023-02-14 22:32:19,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:19,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:32:19,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:19,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:32:19,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:32:19,872 INFO L87 Difference]: Start difference. First operand has 94 states, 82 states have (on average 1.6341463414634145) internal successors, (134), 85 states have internal predecessors, (134), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:19,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:19,955 INFO L93 Difference]: Finished difference Result 235 states and 388 transitions. [2023-02-14 22:32:19,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:32:19,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2023-02-14 22:32:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:19,972 INFO L225 Difference]: With dead ends: 235 [2023-02-14 22:32:19,972 INFO L226 Difference]: Without dead ends: 136 [2023-02-14 22:32:19,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:32:19,980 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 64 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:19,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 278 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:20,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-14 22:32:20,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 126. [2023-02-14 22:32:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 113 states have (on average 1.5309734513274336) internal successors, (173), 115 states have internal predecessors, (173), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-14 22:32:20,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 192 transitions. [2023-02-14 22:32:20,026 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 192 transitions. Word has length 37 [2023-02-14 22:32:20,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:20,028 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 192 transitions. [2023-02-14 22:32:20,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:20,028 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 192 transitions. [2023-02-14 22:32:20,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 22:32:20,031 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:20,031 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:20,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 22:32:20,032 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:20,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash -918189390, now seen corresponding path program 1 times [2023-02-14 22:32:20,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:20,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823625429] [2023-02-14 22:32:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:20,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:20,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:20,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:20,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:20,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:20,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:20,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:20,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823625429] [2023-02-14 22:32:20,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823625429] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:20,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:20,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 22:32:20,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100879328] [2023-02-14 22:32:20,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:20,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:32:20,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:20,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:32:20,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:32:20,161 INFO L87 Difference]: Start difference. First operand 126 states and 192 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:20,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:20,187 INFO L93 Difference]: Finished difference Result 228 states and 349 transitions. [2023-02-14 22:32:20,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:32:20,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-02-14 22:32:20,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:20,190 INFO L225 Difference]: With dead ends: 228 [2023-02-14 22:32:20,190 INFO L226 Difference]: Without dead ends: 192 [2023-02-14 22:32:20,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:32:20,192 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 56 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:20,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 269 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-14 22:32:20,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 183. [2023-02-14 22:32:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 166 states have (on average 1.5060240963855422) internal successors, (250), 169 states have internal predecessors, (250), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-14 22:32:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 276 transitions. [2023-02-14 22:32:20,208 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 276 transitions. Word has length 39 [2023-02-14 22:32:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:20,209 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 276 transitions. [2023-02-14 22:32:20,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:20,209 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 276 transitions. [2023-02-14 22:32:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 22:32:20,211 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:20,211 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:20,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-14 22:32:20,212 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:20,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1366023373, now seen corresponding path program 1 times [2023-02-14 22:32:20,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:20,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381602004] [2023-02-14 22:32:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:20,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:20,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:20,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:20,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:20,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:20,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:20,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:20,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381602004] [2023-02-14 22:32:20,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381602004] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:20,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737667018] [2023-02-14 22:32:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:20,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:20,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:20,602 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:32:20,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 22:32:20,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:20,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 22:32:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:20,807 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 22:32:20,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:20,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737667018] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:20,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:32:20,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 12 [2023-02-14 22:32:20,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926443838] [2023-02-14 22:32:20,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:20,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:32:20,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:20,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:32:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:32:20,874 INFO L87 Difference]: Start difference. First operand 183 states and 276 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:20,900 INFO L93 Difference]: Finished difference Result 319 states and 476 transitions. [2023-02-14 22:32:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:32:20,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-14 22:32:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:20,902 INFO L225 Difference]: With dead ends: 319 [2023-02-14 22:32:20,902 INFO L226 Difference]: Without dead ends: 215 [2023-02-14 22:32:20,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:32:20,904 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 65 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:20,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 266 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:20,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-02-14 22:32:20,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 183. [2023-02-14 22:32:20,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 169 states have internal predecessors, (246), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-14 22:32:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 272 transitions. [2023-02-14 22:32:20,927 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 272 transitions. Word has length 40 [2023-02-14 22:32:20,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:20,928 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 272 transitions. [2023-02-14 22:32:20,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 272 transitions. [2023-02-14 22:32:20,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 22:32:20,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:20,932 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:20,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:21,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:21,138 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:21,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:21,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1808185112, now seen corresponding path program 1 times [2023-02-14 22:32:21,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:21,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387946567] [2023-02-14 22:32:21,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:21,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:21,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:21,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387946567] [2023-02-14 22:32:21,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387946567] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:21,235 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:21,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:32:21,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645213157] [2023-02-14 22:32:21,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:21,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:32:21,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:21,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:32:21,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:32:21,241 INFO L87 Difference]: Start difference. First operand 183 states and 272 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:21,287 INFO L93 Difference]: Finished difference Result 291 states and 436 transitions. [2023-02-14 22:32:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:32:21,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-14 22:32:21,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:21,290 INFO L225 Difference]: With dead ends: 291 [2023-02-14 22:32:21,290 INFO L226 Difference]: Without dead ends: 262 [2023-02-14 22:32:21,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:32:21,296 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 149 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:21,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 469 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:21,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-02-14 22:32:21,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 228. [2023-02-14 22:32:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 207 states have (on average 1.4879227053140096) internal successors, (308), 211 states have internal predecessors, (308), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-14 22:32:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 342 transitions. [2023-02-14 22:32:21,325 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 342 transitions. Word has length 40 [2023-02-14 22:32:21,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:21,327 INFO L495 AbstractCegarLoop]: Abstraction has 228 states and 342 transitions. [2023-02-14 22:32:21,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 342 transitions. [2023-02-14 22:32:21,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 22:32:21,334 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:21,334 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:21,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-14 22:32:21,335 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:21,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:21,335 INFO L85 PathProgramCache]: Analyzing trace with hash 787116758, now seen corresponding path program 1 times [2023-02-14 22:32:21,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:21,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106704652] [2023-02-14 22:32:21,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:21,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:21,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:21,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,381 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:21,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:21,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106704652] [2023-02-14 22:32:21,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106704652] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:21,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:21,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 22:32:21,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063031397] [2023-02-14 22:32:21,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:21,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 22:32:21,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:21,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 22:32:21,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:32:21,384 INFO L87 Difference]: Start difference. First operand 228 states and 342 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:21,400 INFO L93 Difference]: Finished difference Result 241 states and 358 transitions. [2023-02-14 22:32:21,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 22:32:21,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 40 [2023-02-14 22:32:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:21,403 INFO L225 Difference]: With dead ends: 241 [2023-02-14 22:32:21,403 INFO L226 Difference]: Without dead ends: 234 [2023-02-14 22:32:21,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 22:32:21,404 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 8 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:21,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 268 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:21,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-02-14 22:32:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 229. [2023-02-14 22:32:21,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 208 states have (on average 1.4855769230769231) internal successors, (309), 212 states have internal predecessors, (309), 18 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-02-14 22:32:21,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 343 transitions. [2023-02-14 22:32:21,422 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 343 transitions. Word has length 40 [2023-02-14 22:32:21,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:21,423 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 343 transitions. [2023-02-14 22:32:21,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:21,423 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 343 transitions. [2023-02-14 22:32:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 22:32:21,426 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:21,427 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:21,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-02-14 22:32:21,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:21,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1377170827, now seen corresponding path program 1 times [2023-02-14 22:32:21,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:21,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706807331] [2023-02-14 22:32:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:21,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:21,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:21,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:21,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706807331] [2023-02-14 22:32:21,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706807331] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:21,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997055734] [2023-02-14 22:32:21,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:21,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:21,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:21,558 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:32:21,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 22:32:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:21,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 22:32:21,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:21,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:21,858 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:21,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997055734] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:32:21,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:32:21,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-02-14 22:32:21,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50454773] [2023-02-14 22:32:21,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:32:21,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 22:32:21,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:21,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 22:32:21,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-02-14 22:32:21,862 INFO L87 Difference]: Start difference. First operand 229 states and 343 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-14 22:32:22,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:22,108 INFO L93 Difference]: Finished difference Result 762 states and 1139 transitions. [2023-02-14 22:32:22,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 22:32:22,109 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) Word has length 41 [2023-02-14 22:32:22,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:22,112 INFO L225 Difference]: With dead ends: 762 [2023-02-14 22:32:22,113 INFO L226 Difference]: Without dead ends: 576 [2023-02-14 22:32:22,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2023-02-14 22:32:22,114 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 578 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:22,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 1473 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 22:32:22,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2023-02-14 22:32:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 359. [2023-02-14 22:32:22,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 328 states have (on average 1.454268292682927) internal successors, (477), 333 states have internal predecessors, (477), 27 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (29), 26 states have call predecessors, (29), 25 states have call successors, (29) [2023-02-14 22:32:22,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 533 transitions. [2023-02-14 22:32:22,131 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 533 transitions. Word has length 41 [2023-02-14 22:32:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:22,132 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 533 transitions. [2023-02-14 22:32:22,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 17 states have internal predecessors, (61), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 4 states have call successors, (7) [2023-02-14 22:32:22,132 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 533 transitions. [2023-02-14 22:32:22,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 22:32:22,133 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:22,133 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:22,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:22,338 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,SelfDestructingSolverStorable5 [2023-02-14 22:32:22,338 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:22,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:22,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1637932791, now seen corresponding path program 1 times [2023-02-14 22:32:22,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:22,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371811914] [2023-02-14 22:32:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:22,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:22,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:22,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:22,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371811914] [2023-02-14 22:32:22,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371811914] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:22,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:22,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:32:22,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96891213] [2023-02-14 22:32:22,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:22,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:32:22,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:22,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:32:22,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:32:22,426 INFO L87 Difference]: Start difference. First operand 359 states and 533 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:22,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:22,535 INFO L93 Difference]: Finished difference Result 779 states and 1154 transitions. [2023-02-14 22:32:22,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 22:32:22,536 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2023-02-14 22:32:22,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:22,538 INFO L225 Difference]: With dead ends: 779 [2023-02-14 22:32:22,538 INFO L226 Difference]: Without dead ends: 473 [2023-02-14 22:32:22,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:32:22,540 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 75 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:22,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 729 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:32:22,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2023-02-14 22:32:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 469. [2023-02-14 22:32:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 469 states, 432 states have (on average 1.4027777777777777) internal successors, (606), 438 states have internal predecessors, (606), 33 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (35), 34 states have call predecessors, (35), 31 states have call successors, (35) [2023-02-14 22:32:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 674 transitions. [2023-02-14 22:32:22,560 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 674 transitions. Word has length 41 [2023-02-14 22:32:22,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:22,560 INFO L495 AbstractCegarLoop]: Abstraction has 469 states and 674 transitions. [2023-02-14 22:32:22,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:22,561 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 674 transitions. [2023-02-14 22:32:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 22:32:22,562 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:22,562 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:22,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-14 22:32:22,562 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:22,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:22,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1541762706, now seen corresponding path program 1 times [2023-02-14 22:32:22,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:22,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178332124] [2023-02-14 22:32:22,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:22,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:22,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:22,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178332124] [2023-02-14 22:32:22,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178332124] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:22,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:22,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:32:22,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910055788] [2023-02-14 22:32:22,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:22,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:32:22,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:22,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:32:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:32:22,631 INFO L87 Difference]: Start difference. First operand 469 states and 674 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:22,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:22,658 INFO L93 Difference]: Finished difference Result 486 states and 695 transitions. [2023-02-14 22:32:22,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:32:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2023-02-14 22:32:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:22,662 INFO L225 Difference]: With dead ends: 486 [2023-02-14 22:32:22,662 INFO L226 Difference]: Without dead ends: 479 [2023-02-14 22:32:22,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:32:22,664 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 17 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:22,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 400 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-02-14 22:32:22,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 471. [2023-02-14 22:32:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 434 states have (on average 1.400921658986175) internal successors, (608), 440 states have internal predecessors, (608), 33 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (35), 34 states have call predecessors, (35), 31 states have call successors, (35) [2023-02-14 22:32:22,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 676 transitions. [2023-02-14 22:32:22,682 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 676 transitions. Word has length 42 [2023-02-14 22:32:22,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:22,683 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 676 transitions. [2023-02-14 22:32:22,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:22,683 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 676 transitions. [2023-02-14 22:32:22,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 22:32:22,685 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:22,685 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:22,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-02-14 22:32:22,685 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:22,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:22,686 INFO L85 PathProgramCache]: Analyzing trace with hash 233244656, now seen corresponding path program 1 times [2023-02-14 22:32:22,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:22,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779913817] [2023-02-14 22:32:22,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:22,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:22,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:22,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:22,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:22,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779913817] [2023-02-14 22:32:22,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779913817] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:22,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:22,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 22:32:22,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820508454] [2023-02-14 22:32:22,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:22,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:32:22,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:32:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:32:22,745 INFO L87 Difference]: Start difference. First operand 471 states and 676 transitions. Second operand has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:22,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:22,774 INFO L93 Difference]: Finished difference Result 478 states and 682 transitions. [2023-02-14 22:32:22,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 22:32:22,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2023-02-14 22:32:22,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:22,777 INFO L225 Difference]: With dead ends: 478 [2023-02-14 22:32:22,777 INFO L226 Difference]: Without dead ends: 471 [2023-02-14 22:32:22,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:32:22,779 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 5 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:22,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 525 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:22,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2023-02-14 22:32:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 467. [2023-02-14 22:32:22,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 430 states have (on average 1.3976744186046512) internal successors, (601), 436 states have internal predecessors, (601), 33 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (35), 34 states have call predecessors, (35), 31 states have call successors, (35) [2023-02-14 22:32:22,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 669 transitions. [2023-02-14 22:32:22,798 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 669 transitions. Word has length 42 [2023-02-14 22:32:22,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:22,798 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 669 transitions. [2023-02-14 22:32:22,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:22,798 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 669 transitions. [2023-02-14 22:32:22,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-14 22:32:22,799 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:22,799 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:22,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-14 22:32:22,800 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:22,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:22,800 INFO L85 PathProgramCache]: Analyzing trace with hash -469451379, now seen corresponding path program 1 times [2023-02-14 22:32:22,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:22,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367069752] [2023-02-14 22:32:22,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:22,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,852 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:22,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:22,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367069752] [2023-02-14 22:32:22,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367069752] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:22,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:22,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:32:22,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902275937] [2023-02-14 22:32:22,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:22,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:32:22,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:22,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:32:22,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:32:22,854 INFO L87 Difference]: Start difference. First operand 467 states and 669 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:22,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:22,886 INFO L93 Difference]: Finished difference Result 517 states and 734 transitions. [2023-02-14 22:32:22,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:32:22,886 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-02-14 22:32:22,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:22,889 INFO L225 Difference]: With dead ends: 517 [2023-02-14 22:32:22,889 INFO L226 Difference]: Without dead ends: 443 [2023-02-14 22:32:22,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:32:22,890 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 117 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 431 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 [2023-02-14 22:32:22,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 431 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-02-14 22:32:22,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 347. [2023-02-14 22:32:22,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 322 states have (on average 1.3633540372670807) internal successors, (439), 324 states have internal predecessors, (439), 21 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (23), 22 states have call predecessors, (23), 19 states have call successors, (23) [2023-02-14 22:32:22,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 483 transitions. [2023-02-14 22:32:22,908 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 483 transitions. Word has length 43 [2023-02-14 22:32:22,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:22,909 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 483 transitions. [2023-02-14 22:32:22,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:22,909 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 483 transitions. [2023-02-14 22:32:22,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 22:32:22,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:22,910 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:22,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-02-14 22:32:22,911 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:22,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:22,912 INFO L85 PathProgramCache]: Analyzing trace with hash -981904344, now seen corresponding path program 1 times [2023-02-14 22:32:22,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:22,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345064072] [2023-02-14 22:32:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:22,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:22,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:23,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:23,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345064072] [2023-02-14 22:32:23,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345064072] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:23,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:23,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-14 22:32:23,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122572332] [2023-02-14 22:32:23,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:23,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:32:23,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:23,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:32:23,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-02-14 22:32:23,013 INFO L87 Difference]: Start difference. First operand 347 states and 483 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:23,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:23,173 INFO L93 Difference]: Finished difference Result 876 states and 1249 transitions. [2023-02-14 22:32:23,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 22:32:23,174 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-14 22:32:23,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:23,178 INFO L225 Difference]: With dead ends: 876 [2023-02-14 22:32:23,178 INFO L226 Difference]: Without dead ends: 728 [2023-02-14 22:32:23,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-02-14 22:32:23,179 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 177 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 1102 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:23,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 1102 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:32:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2023-02-14 22:32:23,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 442. [2023-02-14 22:32:23,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 416 states have (on average 1.3725961538461537) internal successors, (571), 417 states have internal predecessors, (571), 21 states have call successors, (21), 2 states have call predecessors, (21), 4 states have return successors, (27), 24 states have call predecessors, (27), 19 states have call successors, (27) [2023-02-14 22:32:23,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 619 transitions. [2023-02-14 22:32:23,202 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 619 transitions. Word has length 45 [2023-02-14 22:32:23,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:23,202 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 619 transitions. [2023-02-14 22:32:23,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:23,202 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 619 transitions. [2023-02-14 22:32:23,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 22:32:23,203 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:23,203 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:23,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-02-14 22:32:23,204 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:23,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1791250970, now seen corresponding path program 1 times [2023-02-14 22:32:23,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:23,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242227464] [2023-02-14 22:32:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:23,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:23,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:23,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:23,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:23,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:23,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242227464] [2023-02-14 22:32:23,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242227464] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:23,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096109343] [2023-02-14 22:32:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:23,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:23,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:23,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:32:23,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 22:32:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:23,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 22:32:23,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-14 22:32:23,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:23,525 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:23,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096109343] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:23,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-14 22:32:23,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 6] total 12 [2023-02-14 22:32:23,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45088809] [2023-02-14 22:32:23,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:23,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:32:23,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:32:23,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:32:23,527 INFO L87 Difference]: Start difference. First operand 442 states and 619 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:23,558 INFO L93 Difference]: Finished difference Result 646 states and 892 transitions. [2023-02-14 22:32:23,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:32:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-14 22:32:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:23,560 INFO L225 Difference]: With dead ends: 646 [2023-02-14 22:32:23,560 INFO L226 Difference]: Without dead ends: 414 [2023-02-14 22:32:23,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:32:23,562 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 99 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:23,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 315 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2023-02-14 22:32:23,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 352. [2023-02-14 22:32:23,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 330 states have (on average 1.3424242424242425) internal successors, (443), 332 states have internal predecessors, (443), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (23), 19 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-14 22:32:23,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 483 transitions. [2023-02-14 22:32:23,579 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 483 transitions. Word has length 45 [2023-02-14 22:32:23,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:23,579 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 483 transitions. [2023-02-14 22:32:23,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:23,579 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 483 transitions. [2023-02-14 22:32:23,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 22:32:23,580 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:23,580 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:23,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:23,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:23,786 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:23,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:23,787 INFO L85 PathProgramCache]: Analyzing trace with hash 407796404, now seen corresponding path program 1 times [2023-02-14 22:32:23,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:23,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688650249] [2023-02-14 22:32:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:23,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:23,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:23,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:23,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:32:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:23,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:23,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688650249] [2023-02-14 22:32:23,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688650249] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:23,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:23,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:32:23,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430919317] [2023-02-14 22:32:23,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:23,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:32:23,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:23,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:32:23,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:32:23,831 INFO L87 Difference]: Start difference. First operand 352 states and 483 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:23,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:23,880 INFO L93 Difference]: Finished difference Result 580 states and 792 transitions. [2023-02-14 22:32:23,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-14 22:32:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-14 22:32:23,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:23,883 INFO L225 Difference]: With dead ends: 580 [2023-02-14 22:32:23,883 INFO L226 Difference]: Without dead ends: 540 [2023-02-14 22:32:23,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:32:23,884 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 126 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:23,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 450 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-02-14 22:32:23,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 390. [2023-02-14 22:32:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 368 states have (on average 1.3423913043478262) internal successors, (494), 369 states have internal predecessors, (494), 17 states have call successors, (17), 2 states have call predecessors, (17), 4 states have return successors, (23), 19 states have call predecessors, (23), 15 states have call successors, (23) [2023-02-14 22:32:23,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 534 transitions. [2023-02-14 22:32:23,905 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 534 transitions. Word has length 45 [2023-02-14 22:32:23,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:23,905 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 534 transitions. [2023-02-14 22:32:23,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:23,906 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 534 transitions. [2023-02-14 22:32:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 22:32:23,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:23,907 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:23,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-02-14 22:32:23,907 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:23,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1949462809, now seen corresponding path program 1 times [2023-02-14 22:32:23,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:23,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175473542] [2023-02-14 22:32:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:23,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:24,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:24,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:24,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:24,129 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:24,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:24,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175473542] [2023-02-14 22:32:24,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175473542] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:24,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997719141] [2023-02-14 22:32:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:24,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:24,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:24,131 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:32:24,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 22:32:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:24,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-14 22:32:24,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:32:24,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:24,430 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:24,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997719141] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:32:24,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:32:24,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 18 [2023-02-14 22:32:24,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733706057] [2023-02-14 22:32:24,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:32:24,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 22:32:24,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:24,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 22:32:24,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-02-14 22:32:24,432 INFO L87 Difference]: Start difference. First operand 390 states and 534 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-14 22:32:25,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:25,086 INFO L93 Difference]: Finished difference Result 726 states and 1003 transitions. [2023-02-14 22:32:25,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-14 22:32:25,087 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) Word has length 46 [2023-02-14 22:32:25,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:25,088 INFO L225 Difference]: With dead ends: 726 [2023-02-14 22:32:25,088 INFO L226 Difference]: Without dead ends: 339 [2023-02-14 22:32:25,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-02-14 22:32:25,090 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 290 mSDsluCounter, 2215 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 2380 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:25,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 2380 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 879 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 22:32:25,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-02-14 22:32:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 266. [2023-02-14 22:32:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 247 states have (on average 1.3319838056680162) internal successors, (329), 247 states have internal predecessors, (329), 13 states have call successors, (13), 3 states have call predecessors, (13), 5 states have return successors, (21), 16 states have call predecessors, (21), 12 states have call successors, (21) [2023-02-14 22:32:25,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 363 transitions. [2023-02-14 22:32:25,105 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 363 transitions. Word has length 46 [2023-02-14 22:32:25,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:25,105 INFO L495 AbstractCegarLoop]: Abstraction has 266 states and 363 transitions. [2023-02-14 22:32:25,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (9), 8 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-14 22:32:25,106 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 363 transitions. [2023-02-14 22:32:25,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 22:32:25,107 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:25,107 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:25,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:25,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:25,312 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:25,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:25,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2081922485, now seen corresponding path program 1 times [2023-02-14 22:32:25,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:25,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502457746] [2023-02-14 22:32:25,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:25,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:25,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:25,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:25,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:25,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:25,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502457746] [2023-02-14 22:32:25,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502457746] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:25,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453245942] [2023-02-14 22:32:25,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:25,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:25,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:25,488 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:32:25,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 22:32:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:25,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 22:32:25,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:25,606 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:25,606 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:32:25,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453245942] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:25,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 22:32:25,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2023-02-14 22:32:25,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826858136] [2023-02-14 22:32:25,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:25,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:32:25,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:25,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:32:25,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-14 22:32:25,608 INFO L87 Difference]: Start difference. First operand 266 states and 363 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:25,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:25,757 INFO L93 Difference]: Finished difference Result 438 states and 606 transitions. [2023-02-14 22:32:25,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 22:32:25,758 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2023-02-14 22:32:25,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:25,760 INFO L225 Difference]: With dead ends: 438 [2023-02-14 22:32:25,760 INFO L226 Difference]: Without dead ends: 412 [2023-02-14 22:32:25,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-02-14 22:32:25,761 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 170 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:25,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 763 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:32:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-14 22:32:25,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 344. [2023-02-14 22:32:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 320 states have (on average 1.315625) internal successors, (421), 321 states have internal predecessors, (421), 18 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (26), 21 states have call predecessors, (26), 17 states have call successors, (26) [2023-02-14 22:32:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 465 transitions. [2023-02-14 22:32:25,780 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 465 transitions. Word has length 48 [2023-02-14 22:32:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:25,780 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 465 transitions. [2023-02-14 22:32:25,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 465 transitions. [2023-02-14 22:32:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-14 22:32:25,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:25,781 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:25,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:25,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-14 22:32:25,987 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1511980233, now seen corresponding path program 1 times [2023-02-14 22:32:25,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:25,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787236551] [2023-02-14 22:32:25,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:25,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:26,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:26,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:26,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:26,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:26,029 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:26,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:26,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787236551] [2023-02-14 22:32:26,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787236551] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:26,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:26,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:32:26,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319724340] [2023-02-14 22:32:26,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:26,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:32:26,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:26,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:32:26,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:32:26,031 INFO L87 Difference]: Start difference. First operand 344 states and 465 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:26,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:26,059 INFO L93 Difference]: Finished difference Result 357 states and 479 transitions. [2023-02-14 22:32:26,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:32:26,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 48 [2023-02-14 22:32:26,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:26,061 INFO L225 Difference]: With dead ends: 357 [2023-02-14 22:32:26,061 INFO L226 Difference]: Without dead ends: 296 [2023-02-14 22:32:26,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:32:26,062 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:26,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 384 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:26,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2023-02-14 22:32:26,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2023-02-14 22:32:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 272 states have (on average 1.3345588235294117) internal successors, (363), 275 states have internal predecessors, (363), 18 states have call successors, (18), 3 states have call predecessors, (18), 5 states have return successors, (21), 18 states have call predecessors, (21), 16 states have call successors, (21) [2023-02-14 22:32:26,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 402 transitions. [2023-02-14 22:32:26,076 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 402 transitions. Word has length 48 [2023-02-14 22:32:26,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:26,076 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 402 transitions. [2023-02-14 22:32:26,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:26,076 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 402 transitions. [2023-02-14 22:32:26,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 22:32:26,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:26,077 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:26,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-02-14 22:32:26,078 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:26,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:26,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1092700069, now seen corresponding path program 1 times [2023-02-14 22:32:26,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:26,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428162977] [2023-02-14 22:32:26,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:26,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:26,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:26,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:26,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:26,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:32:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:26,202 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 22:32:26,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:26,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428162977] [2023-02-14 22:32:26,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428162977] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:26,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036133682] [2023-02-14 22:32:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:26,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:26,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:26,205 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:32:26,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 22:32:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:26,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-14 22:32:26,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 22:32:26,500 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:32:26,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036133682] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:26,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 22:32:26,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 15 [2023-02-14 22:32:26,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349644964] [2023-02-14 22:32:26,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:26,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 22:32:26,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:26,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 22:32:26,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-02-14 22:32:26,502 INFO L87 Difference]: Start difference. First operand 296 states and 402 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 22:32:27,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:27,167 INFO L93 Difference]: Finished difference Result 826 states and 1131 transitions. [2023-02-14 22:32:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-14 22:32:27,169 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-02-14 22:32:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:27,171 INFO L225 Difference]: With dead ends: 826 [2023-02-14 22:32:27,171 INFO L226 Difference]: Without dead ends: 582 [2023-02-14 22:32:27,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-02-14 22:32:27,172 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 377 mSDsluCounter, 1747 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:27,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1936 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 22:32:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2023-02-14 22:32:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 532. [2023-02-14 22:32:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 491 states have (on average 1.295315682281059) internal successors, (636), 495 states have internal predecessors, (636), 35 states have call successors, (35), 3 states have call predecessors, (35), 5 states have return successors, (38), 36 states have call predecessors, (38), 32 states have call successors, (38) [2023-02-14 22:32:27,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 709 transitions. [2023-02-14 22:32:27,197 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 709 transitions. Word has length 49 [2023-02-14 22:32:27,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:27,198 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 709 transitions. [2023-02-14 22:32:27,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 22:32:27,198 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 709 transitions. [2023-02-14 22:32:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-14 22:32:27,202 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:27,202 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:27,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:27,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 22:32:27,408 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:27,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:27,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1413515018, now seen corresponding path program 1 times [2023-02-14 22:32:27,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:27,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481425809] [2023-02-14 22:32:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:27,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:27,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:27,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:27,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:27,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:27,802 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 22:32:27,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:27,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481425809] [2023-02-14 22:32:27,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481425809] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:27,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232388318] [2023-02-14 22:32:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:27,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:27,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:27,805 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:32:27,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 22:32:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-14 22:32:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-14 22:32:28,094 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:32:28,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232388318] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:28,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 22:32:28,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [17] total 24 [2023-02-14 22:32:28,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627637340] [2023-02-14 22:32:28,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:28,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 22:32:28,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 22:32:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2023-02-14 22:32:28,095 INFO L87 Difference]: Start difference. First operand 532 states and 709 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:28,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:28,507 INFO L93 Difference]: Finished difference Result 963 states and 1306 transitions. [2023-02-14 22:32:28,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 22:32:28,507 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-02-14 22:32:28,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:28,510 INFO L225 Difference]: With dead ends: 963 [2023-02-14 22:32:28,510 INFO L226 Difference]: Without dead ends: 841 [2023-02-14 22:32:28,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2023-02-14 22:32:28,512 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 299 mSDsluCounter, 1207 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:28,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 1389 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 22:32:28,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2023-02-14 22:32:28,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 712. [2023-02-14 22:32:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 657 states have (on average 1.2891933028919331) internal successors, (847), 662 states have internal predecessors, (847), 49 states have call successors, (49), 3 states have call predecessors, (49), 5 states have return successors, (52), 51 states have call predecessors, (52), 46 states have call successors, (52) [2023-02-14 22:32:28,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 948 transitions. [2023-02-14 22:32:28,545 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 948 transitions. Word has length 50 [2023-02-14 22:32:28,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:28,545 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 948 transitions. [2023-02-14 22:32:28,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:28,546 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 948 transitions. [2023-02-14 22:32:28,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 22:32:28,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:28,547 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:28,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:28,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:28,756 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:28,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:28,756 INFO L85 PathProgramCache]: Analyzing trace with hash 676456102, now seen corresponding path program 1 times [2023-02-14 22:32:28,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:28,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921607688] [2023-02-14 22:32:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:28,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:28,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:28,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:28,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:28,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:28,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:28,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921607688] [2023-02-14 22:32:28,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921607688] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:28,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:28,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 22:32:28,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156863451] [2023-02-14 22:32:28,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:28,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:32:28,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:28,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:32:28,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 22:32:28,803 INFO L87 Difference]: Start difference. First operand 712 states and 948 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:28,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:28,836 INFO L93 Difference]: Finished difference Result 721 states and 956 transitions. [2023-02-14 22:32:28,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:32:28,836 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-14 22:32:28,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:28,839 INFO L225 Difference]: With dead ends: 721 [2023-02-14 22:32:28,839 INFO L226 Difference]: Without dead ends: 686 [2023-02-14 22:32:28,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 22:32:28,840 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 1 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:28,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 381 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:28,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-02-14 22:32:28,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 662. [2023-02-14 22:32:28,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 662 states, 611 states have (on average 1.2913256955810146) internal successors, (789), 616 states have internal predecessors, (789), 45 states have call successors, (45), 3 states have call predecessors, (45), 5 states have return successors, (47), 46 states have call predecessors, (47), 42 states have call successors, (47) [2023-02-14 22:32:28,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 662 states to 662 states and 881 transitions. [2023-02-14 22:32:28,868 INFO L78 Accepts]: Start accepts. Automaton has 662 states and 881 transitions. Word has length 52 [2023-02-14 22:32:28,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:28,868 INFO L495 AbstractCegarLoop]: Abstraction has 662 states and 881 transitions. [2023-02-14 22:32:28,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:28,869 INFO L276 IsEmpty]: Start isEmpty. Operand 662 states and 881 transitions. [2023-02-14 22:32:28,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-14 22:32:28,870 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:28,870 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:28,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-02-14 22:32:28,870 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:28,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:28,871 INFO L85 PathProgramCache]: Analyzing trace with hash 936659247, now seen corresponding path program 1 times [2023-02-14 22:32:28,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:28,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825230095] [2023-02-14 22:32:28,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:28,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:28,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:29,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:29,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:29,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:29,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:29,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:29,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:29,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825230095] [2023-02-14 22:32:29,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825230095] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:29,076 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:29,077 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-02-14 22:32:29,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955307879] [2023-02-14 22:32:29,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:29,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-14 22:32:29,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:29,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-14 22:32:29,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-02-14 22:32:29,078 INFO L87 Difference]: Start difference. First operand 662 states and 881 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:29,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:29,489 INFO L93 Difference]: Finished difference Result 882 states and 1182 transitions. [2023-02-14 22:32:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:32:29,490 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2023-02-14 22:32:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:29,493 INFO L225 Difference]: With dead ends: 882 [2023-02-14 22:32:29,493 INFO L226 Difference]: Without dead ends: 864 [2023-02-14 22:32:29,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-02-14 22:32:29,494 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 275 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 924 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:29,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 924 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 22:32:29,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2023-02-14 22:32:29,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 698. [2023-02-14 22:32:29,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 698 states, 643 states have (on average 1.2892690513219285) internal successors, (829), 649 states have internal predecessors, (829), 49 states have call successors, (49), 3 states have call predecessors, (49), 5 states have return successors, (51), 50 states have call predecessors, (51), 46 states have call successors, (51) [2023-02-14 22:32:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 698 states to 698 states and 929 transitions. [2023-02-14 22:32:29,561 INFO L78 Accepts]: Start accepts. Automaton has 698 states and 929 transitions. Word has length 53 [2023-02-14 22:32:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:29,561 INFO L495 AbstractCegarLoop]: Abstraction has 698 states and 929 transitions. [2023-02-14 22:32:29,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:29,561 INFO L276 IsEmpty]: Start isEmpty. Operand 698 states and 929 transitions. [2023-02-14 22:32:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 22:32:29,562 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:29,563 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:29,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-02-14 22:32:29,563 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:29,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:29,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1573541122, now seen corresponding path program 1 times [2023-02-14 22:32:29,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:29,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146656735] [2023-02-14 22:32:29,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:29,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:29,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:29,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:29,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:29,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:29,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:29,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 22:32:29,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:29,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146656735] [2023-02-14 22:32:29,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146656735] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:29,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:29,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:32:29,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028093147] [2023-02-14 22:32:29,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:29,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:32:29,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:29,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:32:29,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:32:29,630 INFO L87 Difference]: Start difference. First operand 698 states and 929 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:29,710 INFO L93 Difference]: Finished difference Result 753 states and 998 transitions. [2023-02-14 22:32:29,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 22:32:29,710 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2023-02-14 22:32:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:29,713 INFO L225 Difference]: With dead ends: 753 [2023-02-14 22:32:29,713 INFO L226 Difference]: Without dead ends: 751 [2023-02-14 22:32:29,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 22:32:29,714 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 41 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:29,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 665 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:29,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-02-14 22:32:29,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 710. [2023-02-14 22:32:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 650 states have (on average 1.2861538461538462) internal successors, (836), 660 states have internal predecessors, (836), 53 states have call successors, (53), 4 states have call predecessors, (53), 6 states have return successors, (55), 50 states have call predecessors, (55), 50 states have call successors, (55) [2023-02-14 22:32:29,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 944 transitions. [2023-02-14 22:32:29,766 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 944 transitions. Word has length 54 [2023-02-14 22:32:29,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:29,767 INFO L495 AbstractCegarLoop]: Abstraction has 710 states and 944 transitions. [2023-02-14 22:32:29,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 944 transitions. [2023-02-14 22:32:29,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 22:32:29,768 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:29,768 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:29,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-02-14 22:32:29,769 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:29,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:29,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1630799424, now seen corresponding path program 1 times [2023-02-14 22:32:29,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:29,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437674369] [2023-02-14 22:32:29,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:29,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:29,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:29,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:29,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:29,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:29,838 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 22:32:29,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:29,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437674369] [2023-02-14 22:32:29,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437674369] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:29,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:29,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-14 22:32:29,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743269009] [2023-02-14 22:32:29,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:29,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-14 22:32:29,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:29,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-14 22:32:29,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-14 22:32:29,841 INFO L87 Difference]: Start difference. First operand 710 states and 944 transitions. Second operand has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:29,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:29,921 INFO L93 Difference]: Finished difference Result 775 states and 1028 transitions. [2023-02-14 22:32:29,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 22:32:29,922 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2023-02-14 22:32:29,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:29,924 INFO L225 Difference]: With dead ends: 775 [2023-02-14 22:32:29,925 INFO L226 Difference]: Without dead ends: 773 [2023-02-14 22:32:29,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-14 22:32:29,926 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 39 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:29,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 690 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2023-02-14 22:32:29,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 718. [2023-02-14 22:32:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 653 states have (on average 1.2848392036753447) internal successors, (839), 667 states have internal predecessors, (839), 57 states have call successors, (57), 5 states have call predecessors, (57), 7 states have return successors, (59), 50 states have call predecessors, (59), 54 states have call successors, (59) [2023-02-14 22:32:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 955 transitions. [2023-02-14 22:32:29,983 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 955 transitions. Word has length 54 [2023-02-14 22:32:29,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:29,984 INFO L495 AbstractCegarLoop]: Abstraction has 718 states and 955 transitions. [2023-02-14 22:32:29,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 955 transitions. [2023-02-14 22:32:29,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 22:32:29,985 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:29,985 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:29,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-14 22:32:29,986 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:29,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:29,986 INFO L85 PathProgramCache]: Analyzing trace with hash 168234303, now seen corresponding path program 1 times [2023-02-14 22:32:29,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:29,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636236523] [2023-02-14 22:32:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:29,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:30,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:30,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:30,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:32:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-14 22:32:30,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:30,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636236523] [2023-02-14 22:32:30,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636236523] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:30,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 22:32:30,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-02-14 22:32:30,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613044058] [2023-02-14 22:32:30,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:30,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 22:32:30,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:30,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 22:32:30,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2023-02-14 22:32:30,326 INFO L87 Difference]: Start difference. First operand 718 states and 955 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 22:32:30,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:30,758 INFO L93 Difference]: Finished difference Result 755 states and 997 transitions. [2023-02-14 22:32:30,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 22:32:30,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2023-02-14 22:32:30,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:30,761 INFO L225 Difference]: With dead ends: 755 [2023-02-14 22:32:30,761 INFO L226 Difference]: Without dead ends: 753 [2023-02-14 22:32:30,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-02-14 22:32:30,762 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 266 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:30,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 1731 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 22:32:30,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2023-02-14 22:32:30,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 727. [2023-02-14 22:32:30,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 660 states have (on average 1.2833333333333334) internal successors, (847), 675 states have internal predecessors, (847), 58 states have call successors, (58), 6 states have call predecessors, (58), 8 states have return successors, (60), 50 states have call predecessors, (60), 55 states have call successors, (60) [2023-02-14 22:32:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 965 transitions. [2023-02-14 22:32:30,822 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 965 transitions. Word has length 54 [2023-02-14 22:32:30,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:30,823 INFO L495 AbstractCegarLoop]: Abstraction has 727 states and 965 transitions. [2023-02-14 22:32:30,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 10 states have internal predecessors, (38), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 22:32:30,823 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 965 transitions. [2023-02-14 22:32:30,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 22:32:30,824 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:30,824 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:30,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-02-14 22:32:30,825 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:30,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:30,825 INFO L85 PathProgramCache]: Analyzing trace with hash 204553481, now seen corresponding path program 1 times [2023-02-14 22:32:30,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:30,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752519704] [2023-02-14 22:32:30,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:30,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:31,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:31,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:31,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:31,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-14 22:32:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 22:32:31,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:31,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752519704] [2023-02-14 22:32:31,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752519704] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:31,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032425197] [2023-02-14 22:32:31,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:31,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:31,220 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:32:31,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 22:32:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:31,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-14 22:32:31,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:31,369 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 22:32:31,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:32:31,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032425197] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:31,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 22:32:31,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18] total 23 [2023-02-14 22:32:31,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138231926] [2023-02-14 22:32:31,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:31,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 22:32:31,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:31,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 22:32:31,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=452, Unknown=0, NotChecked=0, Total=506 [2023-02-14 22:32:31,371 INFO L87 Difference]: Start difference. First operand 727 states and 965 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:31,606 INFO L93 Difference]: Finished difference Result 922 states and 1235 transitions. [2023-02-14 22:32:31,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-14 22:32:31,607 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2023-02-14 22:32:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:31,610 INFO L225 Difference]: With dead ends: 922 [2023-02-14 22:32:31,610 INFO L226 Difference]: Without dead ends: 859 [2023-02-14 22:32:31,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2023-02-14 22:32:31,612 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 215 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:31,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 826 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:32:31,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 859 states. [2023-02-14 22:32:31,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 859 to 644. [2023-02-14 22:32:31,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 585 states have (on average 1.2837606837606839) internal successors, (751), 599 states have internal predecessors, (751), 51 states have call successors, (51), 6 states have call predecessors, (51), 7 states have return successors, (51), 42 states have call predecessors, (51), 48 states have call successors, (51) [2023-02-14 22:32:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 853 transitions. [2023-02-14 22:32:31,669 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 853 transitions. Word has length 55 [2023-02-14 22:32:31,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:31,670 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 853 transitions. [2023-02-14 22:32:31,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:31,670 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 853 transitions. [2023-02-14 22:32:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-14 22:32:31,671 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:31,671 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:31,681 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:31,877 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,SelfDestructingSolverStorable23 [2023-02-14 22:32:31,878 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:31,878 INFO L85 PathProgramCache]: Analyzing trace with hash 481330603, now seen corresponding path program 1 times [2023-02-14 22:32:31,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:31,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335991882] [2023-02-14 22:32:31,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:31,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:31,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:32,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:32,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:32,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:32:32,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:32,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335991882] [2023-02-14 22:32:32,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335991882] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:32,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821625717] [2023-02-14 22:32:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:32,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:32,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:32,245 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:32:32,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 22:32:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:32,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-14 22:32:32,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:32,373 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-14 22:32:32,374 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:32:32,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821625717] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:32,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 22:32:32,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [17] total 20 [2023-02-14 22:32:32,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991328214] [2023-02-14 22:32:32,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:32,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 22:32:32,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:32,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 22:32:32,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2023-02-14 22:32:32,375 INFO L87 Difference]: Start difference. First operand 644 states and 853 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:32,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:32,547 INFO L93 Difference]: Finished difference Result 785 states and 1023 transitions. [2023-02-14 22:32:32,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 22:32:32,547 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2023-02-14 22:32:32,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:32,550 INFO L225 Difference]: With dead ends: 785 [2023-02-14 22:32:32,550 INFO L226 Difference]: Without dead ends: 751 [2023-02-14 22:32:32,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2023-02-14 22:32:32,552 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 303 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:32,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 424 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 22:32:32,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2023-02-14 22:32:32,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 644. [2023-02-14 22:32:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 644 states, 585 states have (on average 1.2803418803418802) internal successors, (749), 599 states have internal predecessors, (749), 51 states have call successors, (51), 6 states have call predecessors, (51), 7 states have return successors, (51), 42 states have call predecessors, (51), 48 states have call successors, (51) [2023-02-14 22:32:32,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 851 transitions. [2023-02-14 22:32:32,627 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 851 transitions. Word has length 55 [2023-02-14 22:32:32,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:32,627 INFO L495 AbstractCegarLoop]: Abstraction has 644 states and 851 transitions. [2023-02-14 22:32:32,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 851 transitions. [2023-02-14 22:32:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 22:32:32,629 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:32,629 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:32,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:32,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-14 22:32:32,839 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:32,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:32,839 INFO L85 PathProgramCache]: Analyzing trace with hash 226380940, now seen corresponding path program 1 times [2023-02-14 22:32:32,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:32,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707900560] [2023-02-14 22:32:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:32,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:32,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:32,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:32,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 22:32:32,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:32,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707900560] [2023-02-14 22:32:32,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707900560] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:32,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126135207] [2023-02-14 22:32:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:32,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:32,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:32,987 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:32:33,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 22:32:33,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:33,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 22:32:33,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-14 22:32:33,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 22:32:33,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126135207] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 22:32:33,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 22:32:33,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-14 22:32:33,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541092136] [2023-02-14 22:32:33,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 22:32:33,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 22:32:33,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:33,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 22:32:33,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-14 22:32:33,077 INFO L87 Difference]: Start difference. First operand 644 states and 851 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:33,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:33,146 INFO L93 Difference]: Finished difference Result 958 states and 1276 transitions. [2023-02-14 22:32:33,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 22:32:33,147 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2023-02-14 22:32:33,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:33,149 INFO L225 Difference]: With dead ends: 958 [2023-02-14 22:32:33,149 INFO L226 Difference]: Without dead ends: 684 [2023-02-14 22:32:33,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2023-02-14 22:32:33,151 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 2 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:33,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 368 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 22:32:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2023-02-14 22:32:33,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 664. [2023-02-14 22:32:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 605 states have (on average 1.2710743801652893) internal successors, (769), 619 states have internal predecessors, (769), 51 states have call successors, (51), 6 states have call predecessors, (51), 7 states have return successors, (51), 42 states have call predecessors, (51), 48 states have call successors, (51) [2023-02-14 22:32:33,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 871 transitions. [2023-02-14 22:32:33,214 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 871 transitions. Word has length 57 [2023-02-14 22:32:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:33,214 INFO L495 AbstractCegarLoop]: Abstraction has 664 states and 871 transitions. [2023-02-14 22:32:33,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 22:32:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 871 transitions. [2023-02-14 22:32:33,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 22:32:33,215 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:33,216 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:33,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 22:32:33,421 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,SelfDestructingSolverStorable25 [2023-02-14 22:32:33,422 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash -582965686, now seen corresponding path program 1 times [2023-02-14 22:32:33,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:33,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895075407] [2023-02-14 22:32:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:33,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:33,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:33,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:33,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:33,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 22:32:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:32:33,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:33,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895075407] [2023-02-14 22:32:33,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895075407] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:33,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50394718] [2023-02-14 22:32:33,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:33,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:33,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:33,909 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:32:33,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 22:32:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:34,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-14 22:32:34,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 22:32:35,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:32:35,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 22:32:36,826 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:32:36,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50394718] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 22:32:36,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 22:32:36,827 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 45 [2023-02-14 22:32:36,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682477555] [2023-02-14 22:32:36,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 22:32:36,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-14 22:32:36,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 22:32:36,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-14 22:32:36,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1843, Unknown=0, NotChecked=0, Total=1980 [2023-02-14 22:32:36,830 INFO L87 Difference]: Start difference. First operand 664 states and 871 transitions. Second operand has 45 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 37 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-14 22:32:42,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 22:32:42,334 INFO L93 Difference]: Finished difference Result 1216 states and 1611 transitions. [2023-02-14 22:32:42,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 22:32:42,335 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 37 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 57 [2023-02-14 22:32:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 22:32:42,339 INFO L225 Difference]: With dead ends: 1216 [2023-02-14 22:32:42,339 INFO L226 Difference]: Without dead ends: 1052 [2023-02-14 22:32:42,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=392, Invalid=4164, Unknown=0, NotChecked=0, Total=4556 [2023-02-14 22:32:42,342 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 1057 mSDsluCounter, 4922 mSDsCounter, 0 mSdLazyCounter, 2526 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 5124 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-02-14 22:32:42,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1071 Valid, 5124 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2526 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-02-14 22:32:42,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-02-14 22:32:42,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 776. [2023-02-14 22:32:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 708 states have (on average 1.2697740112994351) internal successors, (899), 722 states have internal predecessors, (899), 58 states have call successors, (58), 7 states have call predecessors, (58), 9 states have return successors, (63), 50 states have call predecessors, (63), 55 states have call successors, (63) [2023-02-14 22:32:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1020 transitions. [2023-02-14 22:32:42,422 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1020 transitions. Word has length 57 [2023-02-14 22:32:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 22:32:42,422 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1020 transitions. [2023-02-14 22:32:42,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 42 states have (on average 2.5476190476190474) internal successors, (107), 37 states have internal predecessors, (107), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-14 22:32:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1020 transitions. [2023-02-14 22:32:42,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-14 22:32:42,425 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 22:32:42,425 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 22:32:42,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-14 22:32:42,630 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,SelfDestructingSolverStorable26 [2023-02-14 22:32:42,630 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 22:32:42,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 22:32:42,631 INFO L85 PathProgramCache]: Analyzing trace with hash -813819806, now seen corresponding path program 1 times [2023-02-14 22:32:42,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 22:32:42,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673835534] [2023-02-14 22:32:42,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:42,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 22:32:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-14 22:32:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:42,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-02-14 22:32:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:43,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-02-14 22:32:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 22:32:43,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 22:32:43,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673835534] [2023-02-14 22:32:43,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673835534] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 22:32:43,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966221966] [2023-02-14 22:32:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 22:32:43,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 22:32:43,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 22:32:43,129 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 22:32:43,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 22:32:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 22:32:43,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-14 22:32:43,245 INFO L286 TraceCheckSpWp]: Computing forward predicates...