./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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/nla-digbench-scaling/ps5-ll_unwindbound100.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 aab72618ab8befdf7d3c20393ae3aa97ba59d5fce32037d3e275043b0cba9f2d --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 04:02:25,835 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 04:02:25,836 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 04:02:25,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 04:02:25,868 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 04:02:25,870 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 04:02:25,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 04:02:25,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 04:02:25,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 04:02:25,878 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 04:02:25,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 04:02:25,880 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 04:02:25,881 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 04:02:25,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 04:02:25,884 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 04:02:25,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 04:02:25,885 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 04:02:25,886 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 04:02:25,887 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 04:02:25,891 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 04:02:25,891 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 04:02:25,892 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 04:02:25,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 04:02:25,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 04:02:25,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 04:02:25,900 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 04:02:25,900 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 04:02:25,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 04:02:25,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 04:02:25,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 04:02:25,902 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 04:02:25,903 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 04:02:25,904 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 04:02:25,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 04:02:25,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 04:02:25,906 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 04:02:25,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 04:02:25,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 04:02:25,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 04:02:25,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 04:02:25,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 04:02:25,908 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 04:02:25,930 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 04:02:25,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 04:02:25,931 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 04:02:25,931 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 04:02:25,932 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 04:02:25,932 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 04:02:25,932 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 04:02:25,932 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 04:02:25,932 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 04:02:25,932 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 04:02:25,933 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 04:02:25,933 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 04:02:25,933 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 04:02:25,933 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 04:02:25,934 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 04:02:25,934 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 04:02:25,934 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 04:02:25,934 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 04:02:25,934 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 04:02:25,934 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 04:02:25,934 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 04:02:25,935 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 04:02:25,935 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 04:02:25,935 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 04:02:25,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 04:02:25,935 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 04:02:25,935 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 04:02:25,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 04:02:25,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 04:02:25,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 04:02:25,936 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 04:02:25,936 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 04:02:25,936 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 04:02:25,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 04:02:25,936 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 04:02:25,936 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> aab72618ab8befdf7d3c20393ae3aa97ba59d5fce32037d3e275043b0cba9f2d [2023-02-18 04:02:26,088 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 04:02:26,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 04:02:26,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 04:02:26,104 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 04:02:26,104 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 04:02:26,105 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c [2023-02-18 04:02:27,166 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 04:02:27,323 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 04:02:27,325 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound100.c [2023-02-18 04:02:27,330 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660688d05/f48f6cd96aa34bd0a2ab9b62d67041ed/FLAGcc1e08b45 [2023-02-18 04:02:27,343 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/660688d05/f48f6cd96aa34bd0a2ab9b62d67041ed [2023-02-18 04:02:27,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 04:02:27,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 04:02:27,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 04:02:27,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 04:02:27,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 04:02:27,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba5e7e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27, skipping insertion in model container [2023-02-18 04:02:27,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 04:02:27,371 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 04:02:27,449 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/nla-digbench-scaling/ps5-ll_unwindbound100.c[458,471] [2023-02-18 04:02:27,458 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 04:02:27,464 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 04:02:27,471 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/nla-digbench-scaling/ps5-ll_unwindbound100.c[458,471] [2023-02-18 04:02:27,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 04:02:27,482 INFO L208 MainTranslator]: Completed translation [2023-02-18 04:02:27,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27 WrapperNode [2023-02-18 04:02:27,483 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 04:02:27,483 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 04:02:27,483 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 04:02:27,484 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 04:02:27,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,501 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 43 [2023-02-18 04:02:27,501 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 04:02:27,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 04:02:27,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 04:02:27,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 04:02:27,506 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,506 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,509 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,511 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 04:02:27,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 04:02:27,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 04:02:27,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 04:02:27,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27" (1/1) ... [2023-02-18 04:02:27,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 04:02:27,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:02:27,546 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) [2023-02-18 04:02:27,548 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 [2023-02-18 04:02:27,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 04:02:27,588 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 04:02:27,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 04:02:27,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 04:02:27,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 04:02:27,588 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 04:02:27,626 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 04:02:27,627 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 04:02:27,702 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 04:02:27,706 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 04:02:27,706 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-18 04:02:27,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:02:27 BoogieIcfgContainer [2023-02-18 04:02:27,707 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 04:02:27,708 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 04:02:27,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 04:02:27,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 04:02:27,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 04:02:27" (1/3) ... [2023-02-18 04:02:27,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb718d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:02:27, skipping insertion in model container [2023-02-18 04:02:27,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 04:02:27" (2/3) ... [2023-02-18 04:02:27,711 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb718d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:02:27, skipping insertion in model container [2023-02-18 04:02:27,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:02:27" (3/3) ... [2023-02-18 04:02:27,712 INFO L112 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound100.c [2023-02-18 04:02:27,722 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 04:02:27,722 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 04:02:27,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 04:02:27,754 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;@100f74b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 04:02:27,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 04:02:27,757 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 04:02:27,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-18 04:02:27,761 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:02:27,761 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:02:27,762 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:02:27,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:02:27,765 INFO L85 PathProgramCache]: Analyzing trace with hash -579246775, now seen corresponding path program 1 times [2023-02-18 04:02:27,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:02:27,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506613859] [2023-02-18 04:02:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:02:27,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:02:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:02:27,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:02:27,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506613859] [2023-02-18 04:02:27,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 04:02:27,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035620621] [2023-02-18 04:02:27,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:02:27,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:02:27,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:02:27,839 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) [2023-02-18 04:02:27,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 04:02:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:02:27,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 04:02:27,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:02:27,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 04:02:27,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 04:02:27,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035620621] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 04:02:27,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 04:02:27,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 04:02:27,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896770755] [2023-02-18 04:02:27,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 04:02:27,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 04:02:27,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:02:27,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 04:02:27,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 04:02:27,931 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 04:02:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:02:27,944 INFO L93 Difference]: Finished difference Result 37 states and 51 transitions. [2023-02-18 04:02:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 04:02:27,945 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-18 04:02:27,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:02:27,949 INFO L225 Difference]: With dead ends: 37 [2023-02-18 04:02:27,949 INFO L226 Difference]: Without dead ends: 16 [2023-02-18 04:02:27,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 04:02:27,953 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 04:02:27,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 04:02:27,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-02-18 04:02:27,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-02-18 04:02:27,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 04:02:27,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2023-02-18 04:02:27,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2023-02-18 04:02:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:02:27,988 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2023-02-18 04:02:27,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 04:02:27,989 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2023-02-18 04:02:27,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 04:02:27,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:02:27,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:02:28,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 04:02:28,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-18 04:02:28,196 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:02:28,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:02:28,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1986551203, now seen corresponding path program 1 times [2023-02-18 04:02:28,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:02:28,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334280036] [2023-02-18 04:02:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:02:28,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:02:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:02:28,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:02:28,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334280036] [2023-02-18 04:02:28,246 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 04:02:28,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126567626] [2023-02-18 04:02:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:02:28,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:02:28,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:02:28,266 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) [2023-02-18 04:02:28,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 04:02:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:02:28,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 04:02:28,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:02:28,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 04:02:28,353 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 04:02:28,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126567626] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 04:02:28,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 04:02:28,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 04:02:28,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612879719] [2023-02-18 04:02:28,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 04:02:28,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 04:02:28,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:02:28,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 04:02:28,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 04:02:28,359 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 04:02:28,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:02:28,377 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-02-18 04:02:28,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 04:02:28,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 04:02:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:02:28,379 INFO L225 Difference]: With dead ends: 26 [2023-02-18 04:02:28,380 INFO L226 Difference]: Without dead ends: 18 [2023-02-18 04:02:28,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 04:02:28,381 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 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 [2023-02-18 04:02:28,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 04:02:28,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-18 04:02:28,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-18 04:02:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 04:02:28,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-02-18 04:02:28,390 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 10 [2023-02-18 04:02:28,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:02:28,390 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-02-18 04:02:28,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 04:02:28,391 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-02-18 04:02:28,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-18 04:02:28,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:02:28,392 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:02:28,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-18 04:02:28,597 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,SelfDestructingSolverStorable1 [2023-02-18 04:02:28,598 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:02:28,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:02:28,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1984763743, now seen corresponding path program 1 times [2023-02-18 04:02:28,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:02:28,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803958991] [2023-02-18 04:02:28,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:02:28,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:02:28,610 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:02:28,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1989237442] [2023-02-18 04:02:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:02:28,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:02:28,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:02:28,623 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) [2023-02-18 04:02:28,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 04:02:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:02:28,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 04:02:28,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:02:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 04:02:28,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 04:02:28,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:02:28,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803958991] [2023-02-18 04:02:28,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:02:28,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989237442] [2023-02-18 04:02:28,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989237442] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 04:02:28,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 04:02:28,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-18 04:02:28,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658008158] [2023-02-18 04:02:28,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 04:02:28,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 04:02:28,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:02:28,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 04:02:28,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-18 04:02:28,758 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 04:02:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:02:28,831 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-02-18 04:02:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 04:02:28,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-18 04:02:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:02:28,832 INFO L225 Difference]: With dead ends: 28 [2023-02-18 04:02:28,832 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 04:02:28,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-18 04:02:28,833 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 04:02:28,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 56 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 04:02:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 04:02:28,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-18 04:02:28,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 04:02:28,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-02-18 04:02:28,853 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2023-02-18 04:02:28,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:02:28,854 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-02-18 04:02:28,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 04:02:28,854 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-02-18 04:02:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 04:02:28,855 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:02:28,855 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:02:28,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 04:02:29,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:02:29,059 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:02:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:02:29,060 INFO L85 PathProgramCache]: Analyzing trace with hash -69803837, now seen corresponding path program 1 times [2023-02-18 04:02:29,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:02:29,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671949541] [2023-02-18 04:02:29,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:02:29,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:02:29,086 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:02:29,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201573401] [2023-02-18 04:02:29,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:02:29,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:02:29,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:02:29,090 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) [2023-02-18 04:02:29,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 04:02:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:02:29,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 04:02:29,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:02:29,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 04:02:29,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:02:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 04:02:29,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:02:29,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671949541] [2023-02-18 04:02:29,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:02:29,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201573401] [2023-02-18 04:02:29,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201573401] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:02:29,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 04:02:29,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 04:02:29,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885629468] [2023-02-18 04:02:29,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 04:02:29,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 04:02:29,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:02:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 04:02:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 04:02:29,163 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 04:02:29,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:02:29,204 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-02-18 04:02:29,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 04:02:29,205 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-18 04:02:29,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:02:29,206 INFO L225 Difference]: With dead ends: 58 [2023-02-18 04:02:29,206 INFO L226 Difference]: Without dead ends: 50 [2023-02-18 04:02:29,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-18 04:02:29,207 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 96 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 [2023-02-18 04:02:29,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 96 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 04:02:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-18 04:02:29,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2023-02-18 04:02:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 34 states have internal predecessors, (38), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 04:02:29,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2023-02-18 04:02:29,214 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 18 [2023-02-18 04:02:29,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:02:29,214 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2023-02-18 04:02:29,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 04:02:29,214 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2023-02-18 04:02:29,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-18 04:02:29,215 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:02:29,215 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:02:29,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 04:02:29,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:02:29,422 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:02:29,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:02:29,423 INFO L85 PathProgramCache]: Analyzing trace with hash -68016377, now seen corresponding path program 1 times [2023-02-18 04:02:29,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:02:29,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043016038] [2023-02-18 04:02:29,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:02:29,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:02:29,433 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:02:29,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [370132448] [2023-02-18 04:02:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:02:29,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:02:29,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:02:29,435 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) [2023-02-18 04:02:29,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 04:02:29,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:02:29,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 04:02:29,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:02:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 04:02:29,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:02:29,611 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 04:02:29,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:02:29,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043016038] [2023-02-18 04:02:29,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:02:29,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370132448] [2023-02-18 04:02:29,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370132448] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:02:29,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 04:02:29,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-18 04:02:29,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996514519] [2023-02-18 04:02:29,612 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 04:02:29,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 04:02:29,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:02:29,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 04:02:29,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-18 04:02:29,613 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 04:02:29,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:02:29,677 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2023-02-18 04:02:29,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 04:02:29,678 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-02-18 04:02:29,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:02:29,678 INFO L225 Difference]: With dead ends: 60 [2023-02-18 04:02:29,679 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 04:02:29,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-18 04:02:29,679 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 04:02:29,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 83 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 04:02:29,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 04:02:29,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2023-02-18 04:02:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 04:02:29,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-02-18 04:02:29,688 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 18 [2023-02-18 04:02:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:02:29,688 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-02-18 04:02:29,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 04:02:29,689 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-02-18 04:02:29,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 04:02:29,689 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:02:29,689 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:02:29,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 04:02:29,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:02:29,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:02:29,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:02:29,899 INFO L85 PathProgramCache]: Analyzing trace with hash 156635680, now seen corresponding path program 1 times [2023-02-18 04:02:29,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:02:29,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106540398] [2023-02-18 04:02:29,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:02:29,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:02:29,927 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:02:29,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094118] [2023-02-18 04:02:29,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:02:29,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:02:29,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:02:29,931 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) [2023-02-18 04:02:29,934 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 04:02:29,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:02:29,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-18 04:02:29,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:02:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-18 04:02:30,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:02:52,611 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (or (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) (= (mod (+ (* 20 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| 24) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) 30) 0)))) is different from true [2023-02-18 04:02:59,069 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| Int)) (or (= (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_4| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|)) (= (mod (+ (* 20 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* 15 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9| 24) |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_9|) 30) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-18 04:03:05,136 WARN L837 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 15) |c_ULTIMATE.start_main_~y~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 24) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 20)) 30) 0)) (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (let ((.cse0 (+ |c_ULTIMATE.start_main_~y~0#1| 1))) (= (* |ULTIMATE.start_main_~k~0#1| .cse0) (* .cse0 .cse0))) (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|)))) is different from false [2023-02-18 04:03:05,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:03:05,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106540398] [2023-02-18 04:03:05,147 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:03:05,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094118] [2023-02-18 04:03:05,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094118] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:03:05,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:03:05,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-18 04:03:05,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030933680] [2023-02-18 04:03:05,148 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:03:05,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-18 04:03:05,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:03:05,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-18 04:03:05,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=113, Unknown=14, NotChecked=72, Total=240 [2023-02-18 04:03:05,150 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 04:03:11,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:03:11,246 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-02-18 04:03:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 04:03:11,247 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2023-02-18 04:03:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:03:11,249 INFO L225 Difference]: With dead ends: 51 [2023-02-18 04:03:11,249 INFO L226 Difference]: Without dead ends: 45 [2023-02-18 04:03:11,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=61, Invalid=174, Unknown=17, NotChecked=90, Total=342 [2023-02-18 04:03:11,250 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 7 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 04:03:11,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 73 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 04:03:11,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-18 04:03:11,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-02-18 04:03:11,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-18 04:03:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2023-02-18 04:03:11,264 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 29 [2023-02-18 04:03:11,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:03:11,265 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2023-02-18 04:03:11,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-18 04:03:11,267 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2023-02-18 04:03:11,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-18 04:03:11,268 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:03:11,269 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:03:11,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-18 04:03:11,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:03:11,469 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:03:11,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:03:11,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1793229318, now seen corresponding path program 2 times [2023-02-18 04:03:11,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:03:11,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930672207] [2023-02-18 04:03:11,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:03:11,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:03:11,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:03:11,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949321239] [2023-02-18 04:03:11,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 04:03:11,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:03:11,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:03:11,489 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) [2023-02-18 04:03:11,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 04:03:11,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 04:03:11,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:03:11,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 04:03:11,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:03:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 04:03:11,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:03:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-18 04:03:11,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:03:11,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930672207] [2023-02-18 04:03:11,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:03:11,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949321239] [2023-02-18 04:03:11,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949321239] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:03:11,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 04:03:11,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2023-02-18 04:03:11,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276632097] [2023-02-18 04:03:11,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 04:03:11,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-18 04:03:11,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:03:11,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-18 04:03:11,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-02-18 04:03:11,699 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 04:03:11,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:03:11,937 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2023-02-18 04:03:11,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-18 04:03:11,938 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 37 [2023-02-18 04:03:11,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:03:11,938 INFO L225 Difference]: With dead ends: 62 [2023-02-18 04:03:11,939 INFO L226 Difference]: Without dead ends: 54 [2023-02-18 04:03:11,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2023-02-18 04:03:11,939 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 04:03:11,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 169 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 04:03:11,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-18 04:03:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2023-02-18 04:03:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-18 04:03:11,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2023-02-18 04:03:11,952 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 37 [2023-02-18 04:03:11,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:03:11,952 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2023-02-18 04:03:11,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 04:03:11,953 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2023-02-18 04:03:11,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-18 04:03:11,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:03:11,955 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:03:11,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-18 04:03:12,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:03:12,160 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:03:12,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:03:12,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1854611729, now seen corresponding path program 1 times [2023-02-18 04:03:12,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:03:12,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183668968] [2023-02-18 04:03:12,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:03:12,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:03:12,179 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:03:12,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [751400668] [2023-02-18 04:03:12,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:03:12,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:03:12,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:03:12,202 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 04:03:12,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 04:03:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 04:03:12,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 04:03:12,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:03:12,314 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 04:03:12,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:03:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-02-18 04:03:12,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:03:12,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183668968] [2023-02-18 04:03:12,356 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:03:12,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751400668] [2023-02-18 04:03:12,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751400668] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:03:12,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 04:03:12,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 04:03:12,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074156142] [2023-02-18 04:03:12,357 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 04:03:12,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 04:03:12,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:03:12,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 04:03:12,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 04:03:12,366 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-18 04:03:12,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:03:12,533 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2023-02-18 04:03:12,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 04:03:12,533 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 47 [2023-02-18 04:03:12,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:03:12,538 INFO L225 Difference]: With dead ends: 126 [2023-02-18 04:03:12,538 INFO L226 Difference]: Without dead ends: 116 [2023-02-18 04:03:12,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-18 04:03:12,539 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 83 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 04:03:12,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 128 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 04:03:12,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-18 04:03:12,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 96. [2023-02-18 04:03:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 73 states have internal predecessors, (75), 16 states have call successors, (16), 11 states have call predecessors, (16), 10 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-18 04:03:12,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2023-02-18 04:03:12,564 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 47 [2023-02-18 04:03:12,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:03:12,565 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2023-02-18 04:03:12,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 9 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2023-02-18 04:03:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2023-02-18 04:03:12,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-18 04:03:12,569 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:03:12,569 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:03:12,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 04:03:12,774 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,SelfDestructingSolverStorable7 [2023-02-18 04:03:12,774 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:03:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:03:12,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1021371784, now seen corresponding path program 3 times [2023-02-18 04:03:12,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:03:12,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552552299] [2023-02-18 04:03:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:03:12,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:03:12,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:03:12,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741292808] [2023-02-18 04:03:12,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 04:03:12,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:03:12,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:03:12,810 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) [2023-02-18 04:03:12,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 04:03:19,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-18 04:03:19,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:03:19,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-18 04:03:19,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:03:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-18 04:03:19,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:03:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 14 proven. 60 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-18 04:03:19,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:03:19,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552552299] [2023-02-18 04:03:19,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:03:19,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741292808] [2023-02-18 04:03:19,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741292808] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:03:19,691 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 04:03:19,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2023-02-18 04:03:19,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065412735] [2023-02-18 04:03:19,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 04:03:19,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-18 04:03:19,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:03:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-18 04:03:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-02-18 04:03:19,692 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 22 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 04:03:20,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:03:20,205 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2023-02-18 04:03:20,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 04:03:20,205 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 61 [2023-02-18 04:03:20,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:03:20,206 INFO L225 Difference]: With dead ends: 113 [2023-02-18 04:03:20,206 INFO L226 Difference]: Without dead ends: 102 [2023-02-18 04:03:20,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=1105, Unknown=0, NotChecked=0, Total=1406 [2023-02-18 04:03:20,207 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 94 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 04:03:20,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 325 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 04:03:20,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-18 04:03:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2023-02-18 04:03:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 73 states have internal predecessors, (76), 14 states have call successors, (14), 11 states have call predecessors, (14), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 04:03:20,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2023-02-18 04:03:20,219 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 61 [2023-02-18 04:03:20,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:03:20,220 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2023-02-18 04:03:20,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-18 04:03:20,220 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2023-02-18 04:03:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-18 04:03:20,220 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:03:20,221 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:03:20,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-18 04:03:20,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:03:20,429 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:03:20,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:03:20,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1956819211, now seen corresponding path program 2 times [2023-02-18 04:03:20,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:03:20,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257032349] [2023-02-18 04:03:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:03:20,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:03:20,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:03:20,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260615335] [2023-02-18 04:03:20,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 04:03:20,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:03:20,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:03:20,451 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) [2023-02-18 04:03:20,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-18 04:03:20,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 04:03:20,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:03:20,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 04:03:20,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:03:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 60 proven. 380 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 04:03:20,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:03:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 22 proven. 200 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-18 04:03:20,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:03:20,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257032349] [2023-02-18 04:03:20,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:03:20,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260615335] [2023-02-18 04:03:20,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260615335] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 04:03:20,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 04:03:20,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 26 [2023-02-18 04:03:20,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967854001] [2023-02-18 04:03:20,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 04:03:20,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-18 04:03:20,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:03:20,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-18 04:03:20,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2023-02-18 04:03:20,706 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-02-18 04:03:21,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:03:21,045 INFO L93 Difference]: Finished difference Result 258 states and 281 transitions. [2023-02-18 04:03:21,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-18 04:03:21,046 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 95 [2023-02-18 04:03:21,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:03:21,047 INFO L225 Difference]: With dead ends: 258 [2023-02-18 04:03:21,047 INFO L226 Difference]: Without dead ends: 248 [2023-02-18 04:03:21,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2023-02-18 04:03:21,049 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 158 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 04:03:21,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 236 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 04:03:21,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-02-18 04:03:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 198. [2023-02-18 04:03:21,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 141 states have (on average 1.0851063829787233) internal successors, (153), 151 states have internal predecessors, (153), 34 states have call successors, (34), 23 states have call predecessors, (34), 22 states have return successors, (33), 23 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 04:03:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 220 transitions. [2023-02-18 04:03:21,093 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 220 transitions. Word has length 95 [2023-02-18 04:03:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:03:21,094 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 220 transitions. [2023-02-18 04:03:21,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.230769230769231) internal successors, (110), 26 states have internal predecessors, (110), 21 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2023-02-18 04:03:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 220 transitions. [2023-02-18 04:03:21,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-18 04:03:21,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:03:21,095 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:03:21,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-18 04:03:21,299 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,SelfDestructingSolverStorable9 [2023-02-18 04:03:21,300 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:03:21,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:03:21,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1584846500, now seen corresponding path program 4 times [2023-02-18 04:03:21,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:03:21,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224420054] [2023-02-18 04:03:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:03:21,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:03:21,307 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:03:21,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151803710] [2023-02-18 04:03:21,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 04:03:21,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:03:21,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:03:21,325 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) [2023-02-18 04:03:21,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-18 04:03:21,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 04:03:21,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 04:03:21,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-18 04:03:21,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 04:03:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2023-02-18 04:03:21,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 04:03:21,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 04:03:21,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224420054] [2023-02-18 04:03:21,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 04:03:21,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151803710] [2023-02-18 04:03:21,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151803710] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 04:03:21,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 04:03:21,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 04:03:21,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296694850] [2023-02-18 04:03:21,687 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 04:03:21,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 04:03:21,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 04:03:21,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 04:03:21,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2023-02-18 04:03:21,688 INFO L87 Difference]: Start difference. First operand 198 states and 220 transitions. Second operand has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 04:03:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 04:03:22,064 INFO L93 Difference]: Finished difference Result 203 states and 224 transitions. [2023-02-18 04:03:22,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 04:03:22,064 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 109 [2023-02-18 04:03:22,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 04:03:22,067 INFO L225 Difference]: With dead ends: 203 [2023-02-18 04:03:22,067 INFO L226 Difference]: Without dead ends: 197 [2023-02-18 04:03:22,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-02-18 04:03:22,069 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 2 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 04:03:22,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 575 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 04:03:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-02-18 04:03:22,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2023-02-18 04:03:22,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 141 states have (on average 1.0780141843971631) internal successors, (152), 150 states have internal predecessors, (152), 33 states have call successors, (33), 23 states have call predecessors, (33), 22 states have return successors, (32), 23 states have call predecessors, (32), 32 states have call successors, (32) [2023-02-18 04:03:22,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 217 transitions. [2023-02-18 04:03:22,137 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 217 transitions. Word has length 109 [2023-02-18 04:03:22,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 04:03:22,137 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 217 transitions. [2023-02-18 04:03:22,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-18 04:03:22,138 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 217 transitions. [2023-02-18 04:03:22,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-18 04:03:22,143 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 04:03:22,143 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 04:03:22,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-18 04:03:22,348 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,SelfDestructingSolverStorable10 [2023-02-18 04:03:22,349 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 04:03:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 04:03:22,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1568440706, now seen corresponding path program 5 times [2023-02-18 04:03:22,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 04:03:22,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009868379] [2023-02-18 04:03:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 04:03:22,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 04:03:22,388 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 04:03:22,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [825952449] [2023-02-18 04:03:22,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 04:03:22,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 04:03:22,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 04:03:22,392 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) [2023-02-18 04:03:22,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process