./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i --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/divbin_unwindbound50.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-18 01:45:22,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 01:45:22,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 01:45:22,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 01:45:22,231 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 01:45:22,234 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 01:45:22,235 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 01:45:22,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 01:45:22,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 01:45:22,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 01:45:22,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 01:45:22,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 01:45:22,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 01:45:22,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 01:45:22,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 01:45:22,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 01:45:22,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 01:45:22,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 01:45:22,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 01:45:22,257 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 01:45:22,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 01:45:22,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 01:45:22,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 01:45:22,260 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 01:45:22,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 01:45:22,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 01:45:22,267 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 01:45:22,268 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 01:45:22,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 01:45:22,269 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 01:45:22,269 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 01:45:22,270 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 01:45:22,271 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 01:45:22,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 01:45:22,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 01:45:22,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 01:45:22,273 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 01:45:22,273 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 01:45:22,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 01:45:22,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 01:45:22,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 01:45:22,275 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 01:45:22,300 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 01:45:22,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 01:45:22,301 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 01:45:22,301 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 01:45:22,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 01:45:22,302 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 01:45:22,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 01:45:22,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 01:45:22,302 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 01:45:22,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 01:45:22,303 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 01:45:22,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 01:45:22,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 01:45:22,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 01:45:22,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 01:45:22,304 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 01:45:22,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 01:45:22,304 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 01:45:22,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 01:45:22,304 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 01:45:22,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 01:45:22,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 01:45:22,305 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 01:45:22,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 01:45:22,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 01:45:22,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 01:45:22,305 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 01:45:22,305 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 01:45:22,305 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 01:45:22,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 01:45:22,306 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 01:45:22,306 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 01:45:22,306 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 01:45:22,306 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 01:45:22,306 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 01:45:22,306 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 462bdab67ac93ddd789186f30bfdfc189629d2959c27ec219da5960b800d2042 [2023-02-18 01:45:22,525 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 01:45:22,544 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 01:45:22,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 01:45:22,547 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 01:45:22,547 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 01:45:22,548 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2023-02-18 01:45:23,570 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 01:45:23,704 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 01:45:23,705 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/divbin_unwindbound50.i [2023-02-18 01:45:23,709 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/703c4f039/db593769ce074b0aa4c3515f0a55fa10/FLAGd8675d0ef [2023-02-18 01:45:23,719 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/703c4f039/db593769ce074b0aa4c3515f0a55fa10 [2023-02-18 01:45:23,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 01:45:23,721 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 01:45:23,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 01:45:23,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 01:45:23,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 01:45:23,728 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,729 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@440988ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23, skipping insertion in model container [2023-02-18 01:45:23,729 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 01:45:23,745 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 01:45:23,833 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/divbin_unwindbound50.i[950,963] [2023-02-18 01:45:23,854 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 01:45:23,864 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 01:45:23,875 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/divbin_unwindbound50.i[950,963] [2023-02-18 01:45:23,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 01:45:23,907 INFO L208 MainTranslator]: Completed translation [2023-02-18 01:45:23,907 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23 WrapperNode [2023-02-18 01:45:23,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 01:45:23,908 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 01:45:23,909 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 01:45:23,909 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 01:45:23,914 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,919 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,934 INFO L138 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2023-02-18 01:45:23,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 01:45:23,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 01:45:23,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 01:45:23,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 01:45:23,942 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,950 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,950 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,959 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,966 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 01:45:23,970 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 01:45:23,970 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 01:45:23,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 01:45:23,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23" (1/1) ... [2023-02-18 01:45:23,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 01:45:23,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:45:24,007 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 01:45:24,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 01:45:24,043 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-18 01:45:24,043 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-18 01:45:24,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 01:45:24,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 01:45:24,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 01:45:24,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 01:45:24,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 01:45:24,030 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 01:45:24,094 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 01:45:24,096 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 01:45:24,258 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 01:45:24,262 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 01:45:24,276 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-18 01:45:24,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:45:24 BoogieIcfgContainer [2023-02-18 01:45:24,279 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 01:45:24,280 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 01:45:24,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 01:45:24,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 01:45:24,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 01:45:23" (1/3) ... [2023-02-18 01:45:24,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ae23d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:45:24, skipping insertion in model container [2023-02-18 01:45:24,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 01:45:23" (2/3) ... [2023-02-18 01:45:24,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ae23d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 01:45:24, skipping insertion in model container [2023-02-18 01:45:24,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 01:45:24" (3/3) ... [2023-02-18 01:45:24,285 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin_unwindbound50.i [2023-02-18 01:45:24,298 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 01:45:24,309 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 01:45:24,348 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 01:45:24,352 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;@573ac8f1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 01:45:24,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 01:45:24,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:45:24,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-18 01:45:24,366 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:45:24,366 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:45:24,367 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:45:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:45:24,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1267887399, now seen corresponding path program 1 times [2023-02-18 01:45:24,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:45:24,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028639058] [2023-02-18 01:45:24,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:24,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:45:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:45:24,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:45:24,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028639058] [2023-02-18 01:45:24,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-18 01:45:24,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078716518] [2023-02-18 01:45:24,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:24,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:45:24,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:45:24,461 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 01:45:24,463 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 01:45:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:45:24,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-18 01:45:24,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:45:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 01:45:24,556 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:45:24,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078716518] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:45:24,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:45:24,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 01:45:24,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993737620] [2023-02-18 01:45:24,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:45:24,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 01:45:24,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:45:24,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 01:45:24,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 01:45:24,593 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:45:24,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:45:24,607 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2023-02-18 01:45:24,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 01:45:24,612 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2023-02-18 01:45:24,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:45:24,617 INFO L225 Difference]: With dead ends: 53 [2023-02-18 01:45:24,617 INFO L226 Difference]: Without dead ends: 24 [2023-02-18 01:45:24,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 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 01:45:24,621 INFO L413 NwaCegarLoop]: 34 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, 34 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 01:45:24,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:45:24,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-18 01:45:24,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-18 01:45:24,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 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 01:45:24,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2023-02-18 01:45:24,674 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 19 [2023-02-18 01:45:24,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:45:24,676 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2023-02-18 01:45:24,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 01:45:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2023-02-18 01:45:24,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-18 01:45:24,680 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:45:24,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:45:24,688 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 01:45:24,885 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 01:45:24,886 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:45:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:45:24,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1485611193, now seen corresponding path program 1 times [2023-02-18 01:45:24,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:45:24,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797080484] [2023-02-18 01:45:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:24,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:45:24,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:45:24,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109525545] [2023-02-18 01:45:24,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:24,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:45:24,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:45:24,909 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 01:45:24,911 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 01:45:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:45:24,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 01:45:24,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:45:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:45:24,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:45:24,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:45:24,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797080484] [2023-02-18 01:45:24,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:45:24,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109525545] [2023-02-18 01:45:24,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109525545] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:45:24,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:45:24,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 01:45:24,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541839182] [2023-02-18 01:45:24,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:45:24,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 01:45:24,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:45:24,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 01:45:24,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-18 01:45:24,977 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 01:45:24,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:45:24,989 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-02-18 01:45:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 01:45:24,990 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2023-02-18 01:45:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:45:24,991 INFO L225 Difference]: With dead ends: 38 [2023-02-18 01:45:24,991 INFO L226 Difference]: Without dead ends: 26 [2023-02-18 01:45:24,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 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 01:45:24,992 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:45:24,992 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:45:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-18 01:45:24,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-18 01:45:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 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 01:45:24,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-02-18 01:45:24,997 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 21 [2023-02-18 01:45:24,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:45:24,998 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-02-18 01:45:24,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 01:45:24,998 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-02-18 01:45:24,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 01:45:24,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:45:24,999 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:45:25,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 01:45:25,204 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 01:45:25,205 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:45:25,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:45:25,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1580975129, now seen corresponding path program 1 times [2023-02-18 01:45:25,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:45:25,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834647947] [2023-02-18 01:45:25,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:25,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:45:25,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:45:25,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346244369] [2023-02-18 01:45:25,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:25,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:45:25,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:45:25,220 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 01:45:25,222 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 01:45:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:45:25,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-18 01:45:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:45:25,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:45:25,411 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:45:25,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:45:25,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834647947] [2023-02-18 01:45:25,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:45:25,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346244369] [2023-02-18 01:45:25,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346244369] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:45:25,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:45:25,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-02-18 01:45:25,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066123506] [2023-02-18 01:45:25,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:45:25,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 01:45:25,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:45:25,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 01:45:25,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-02-18 01:45:25,414 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 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 01:45:25,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:45:25,520 INFO L93 Difference]: Finished difference Result 38 states and 47 transitions. [2023-02-18 01:45:25,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 01:45:25,521 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-18 01:45:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:45:25,522 INFO L225 Difference]: With dead ends: 38 [2023-02-18 01:45:25,523 INFO L226 Difference]: Without dead ends: 35 [2023-02-18 01:45:25,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-02-18 01:45:25,527 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 31 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:45:25,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 122 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:45:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-18 01:45:25,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-02-18 01:45:25,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:45:25,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2023-02-18 01:45:25,545 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 22 [2023-02-18 01:45:25,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:45:25,546 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2023-02-18 01:45:25,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (3), 2 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 01:45:25,546 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2023-02-18 01:45:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-18 01:45:25,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:45:25,547 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:45:25,556 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 01:45:25,754 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 01:45:25,756 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:45:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:45:25,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1106421036, now seen corresponding path program 1 times [2023-02-18 01:45:25,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:45:25,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939589961] [2023-02-18 01:45:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:25,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:45:25,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:45:25,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038504106] [2023-02-18 01:45:25,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:25,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:45:25,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:45:25,775 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 01:45:25,777 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 01:45:25,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:45:25,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-18 01:45:25,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:45:25,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:45:25,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:45:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:45:25,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:45:25,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939589961] [2023-02-18 01:45:25,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:45:25,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038504106] [2023-02-18 01:45:25,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038504106] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:45:25,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:45:25,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-18 01:45:25,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978305407] [2023-02-18 01:45:25,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:45:25,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-18 01:45:25,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:45:25,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-18 01:45:25,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-18 01:45:25,867 INFO L87 Difference]: Start difference. First operand 35 states and 42 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 01:45:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:45:25,925 INFO L93 Difference]: Finished difference Result 69 states and 88 transitions. [2023-02-18 01:45:25,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-18 01:45:25,926 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 24 [2023-02-18 01:45:25,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:45:25,930 INFO L225 Difference]: With dead ends: 69 [2023-02-18 01:45:25,931 INFO L226 Difference]: Without dead ends: 57 [2023-02-18 01:45:25,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 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 01:45:25,936 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:45:25,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 139 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:45:25,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-18 01:45:25,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2023-02-18 01:45:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:45:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-02-18 01:45:25,944 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 24 [2023-02-18 01:45:25,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:45:25,944 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-02-18 01:45:25,944 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, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-02-18 01:45:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-02-18 01:45:25,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-18 01:45:25,945 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:45:25,945 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:45:25,952 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 01:45:26,150 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 01:45:26,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:45:26,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:45:26,151 INFO L85 PathProgramCache]: Analyzing trace with hash -450968108, now seen corresponding path program 1 times [2023-02-18 01:45:26,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:45:26,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969541471] [2023-02-18 01:45:26,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:26,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:45:26,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:45:26,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335724485] [2023-02-18 01:45:26,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:26,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:45:26,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:45:26,163 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 01:45:26,165 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 01:45:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:45:26,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 01:45:26,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:45:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 01:45:26,215 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:45:26,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:45:26,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969541471] [2023-02-18 01:45:26,215 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:45:26,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335724485] [2023-02-18 01:45:26,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335724485] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:45:26,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:45:26,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-18 01:45:26,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142143052] [2023-02-18 01:45:26,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:45:26,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-18 01:45:26,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:45:26,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-18 01:45:26,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-18 01:45:26,217 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 01:45:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:45:26,259 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2023-02-18 01:45:26,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-18 01:45:26,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 25 [2023-02-18 01:45:26,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:45:26,261 INFO L225 Difference]: With dead ends: 55 [2023-02-18 01:45:26,261 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 01:45:26,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-18 01:45:26,262 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:45:26,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 81 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:45:26,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 01:45:26,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2023-02-18 01:45:26,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 36 states have internal predecessors, (45), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:45:26,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-02-18 01:45:26,268 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2023-02-18 01:45:26,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:45:26,269 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-02-18 01:45:26,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-18 01:45:26,269 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-02-18 01:45:26,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-18 01:45:26,269 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:45:26,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:45:26,278 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 01:45:26,470 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 01:45:26,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:45:26,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:45:26,471 INFO L85 PathProgramCache]: Analyzing trace with hash -791365823, now seen corresponding path program 1 times [2023-02-18 01:45:26,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:45:26,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492122174] [2023-02-18 01:45:26,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:26,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:45:26,481 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:45:26,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91057240] [2023-02-18 01:45:26,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:26,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:45:26,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:45:26,495 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 01:45:26,499 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 01:45:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:45:26,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 01:45:26,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:45:26,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:45:26,547 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-18 01:45:26,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:45:26,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492122174] [2023-02-18 01:45:26,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:45:26,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91057240] [2023-02-18 01:45:26,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91057240] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 01:45:26,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 01:45:26,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 01:45:26,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702740882] [2023-02-18 01:45:26,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 01:45:26,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 01:45:26,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:45:26,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 01:45:26,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 01:45:26,551 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 01:45:26,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:45:26,576 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2023-02-18 01:45:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 01:45:26,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-18 01:45:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:45:26,579 INFO L225 Difference]: With dead ends: 69 [2023-02-18 01:45:26,579 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 01:45:26,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 01:45:26,580 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:45:26,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:45:26,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 01:45:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-18 01:45:26,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 states have internal predecessors, (44), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:45:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-02-18 01:45:26,588 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 31 [2023-02-18 01:45:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:45:26,588 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-02-18 01:45:26,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 01:45:26,591 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-02-18 01:45:26,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 01:45:26,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:45:26,597 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:45:26,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 01:45:26,802 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 01:45:26,802 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:45:26,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:45:26,802 INFO L85 PathProgramCache]: Analyzing trace with hash 675416052, now seen corresponding path program 1 times [2023-02-18 01:45:26,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:45:26,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730284043] [2023-02-18 01:45:26,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:26,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:45:26,812 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:45:26,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000226881] [2023-02-18 01:45:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:26,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:45:26,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:45:26,817 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 01:45:26,825 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 01:45:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:45:26,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-18 01:45:26,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:45:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-18 01:45:26,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:45:27,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:45:27,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730284043] [2023-02-18 01:45:27,041 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:45:27,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000226881] [2023-02-18 01:45:27,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000226881] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:45:27,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:45:27,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-02-18 01:45:27,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342663715] [2023-02-18 01:45:27,042 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:45:27,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-18 01:45:27,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:45:27,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-18 01:45:27,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-18 01:45:27,043 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 01:45:27,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:45:27,099 INFO L93 Difference]: Finished difference Result 55 states and 66 transitions. [2023-02-18 01:45:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 01:45:27,099 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 34 [2023-02-18 01:45:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:45:27,100 INFO L225 Difference]: With dead ends: 55 [2023-02-18 01:45:27,100 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 01:45:27,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-02-18 01:45:27,101 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:45:27,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 102 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 01:45:27,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 01:45:27,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-02-18 01:45:27,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 01:45:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2023-02-18 01:45:27,106 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 34 [2023-02-18 01:45:27,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:45:27,106 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2023-02-18 01:45:27,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-18 01:45:27,106 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2023-02-18 01:45:27,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-18 01:45:27,106 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:45:27,106 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:45:27,115 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 01:45:27,307 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 01:45:27,307 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:45:27,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:45:27,308 INFO L85 PathProgramCache]: Analyzing trace with hash 886516180, now seen corresponding path program 2 times [2023-02-18 01:45:27,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:45:27,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185621967] [2023-02-18 01:45:27,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:27,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:45:27,324 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:45:27,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247667320] [2023-02-18 01:45:27,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 01:45:27,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:45:27,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:45:27,327 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 01:45:27,329 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 01:45:27,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 01:45:27,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:45:27,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-18 01:45:27,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:45:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 01:45:36,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:45:37,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:45:37,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185621967] [2023-02-18 01:45:37,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:45:37,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247667320] [2023-02-18 01:45:37,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247667320] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:45:37,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:45:37,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-18 01:45:37,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579276653] [2023-02-18 01:45:37,071 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:45:37,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 01:45:37,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:45:37,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 01:45:37,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2023-02-18 01:45:37,072 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:45:37,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:45:37,221 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2023-02-18 01:45:37,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 01:45:37,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2023-02-18 01:45:37,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:45:37,222 INFO L225 Difference]: With dead ends: 90 [2023-02-18 01:45:37,222 INFO L226 Difference]: Without dead ends: 52 [2023-02-18 01:45:37,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-02-18 01:45:37,223 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 28 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:45:37,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 133 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:45:37,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-18 01:45:37,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-02-18 01:45:37,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 42 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-18 01:45:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2023-02-18 01:45:37,228 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 43 [2023-02-18 01:45:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:45:37,228 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2023-02-18 01:45:37,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:45:37,228 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2023-02-18 01:45:37,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-18 01:45:37,229 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:45:37,230 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:45:37,247 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 01:45:37,433 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 01:45:37,433 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:45:37,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:45:37,433 INFO L85 PathProgramCache]: Analyzing trace with hash -2006317561, now seen corresponding path program 3 times [2023-02-18 01:45:37,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:45:37,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190844765] [2023-02-18 01:45:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:45:37,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:45:37,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:45:37,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [523284046] [2023-02-18 01:45:37,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 01:45:37,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:45:37,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:45:37,454 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 01:45:37,456 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 01:45:51,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 01:45:51,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:45:51,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-18 01:45:51,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:46:00,096 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-18 01:46:00,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:46:46,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:46:46,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190844765] [2023-02-18 01:46:46,987 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:46:46,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523284046] [2023-02-18 01:46:46,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523284046] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:46:46,987 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:46:46,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 01:46:46,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715079009] [2023-02-18 01:46:46,987 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:46:46,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 01:46:46,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:46:46,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 01:46:46,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=493, Unknown=9, NotChecked=0, Total=600 [2023-02-18 01:46:46,989 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 01:47:01,783 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:47:03,099 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:47:04,378 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:47:06,383 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:47:09,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:47:11,305 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:47:13,819 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:47:15,310 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:47:16,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:47:19,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:47:22,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:47:24,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:47:24,003 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2023-02-18 01:47:24,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 01:47:24,004 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 46 [2023-02-18 01:47:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:47:24,004 INFO L225 Difference]: With dead ends: 92 [2023-02-18 01:47:24,004 INFO L226 Difference]: Without dead ends: 86 [2023-02-18 01:47:24,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 50.5s TimeCoverageRelationStatistics Valid=130, Invalid=728, Unknown=12, NotChecked=0, Total=870 [2023-02-18 01:47:24,005 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 42 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 15 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:47:24,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 334 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 471 Invalid, 4 Unknown, 0 Unchecked, 25.1s Time] [2023-02-18 01:47:24,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-18 01:47:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 73. [2023-02-18 01:47:24,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 59 states have internal predecessors, (67), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-18 01:47:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 84 transitions. [2023-02-18 01:47:24,013 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 84 transitions. Word has length 46 [2023-02-18 01:47:24,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:47:24,013 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 84 transitions. [2023-02-18 01:47:24,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-02-18 01:47:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 84 transitions. [2023-02-18 01:47:24,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 01:47:24,014 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:47:24,014 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:47:24,023 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 01:47:24,223 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 01:47:24,223 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:47:24,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:47:24,224 INFO L85 PathProgramCache]: Analyzing trace with hash 397465844, now seen corresponding path program 4 times [2023-02-18 01:47:24,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:47:24,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271671942] [2023-02-18 01:47:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:47:24,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:47:24,245 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:47:24,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327916116] [2023-02-18 01:47:24,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 01:47:24,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:47:24,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:47:24,248 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 01:47:24,250 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 01:47:26,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 01:47:26,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:47:26,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-18 01:47:26,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:47:34,256 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 01:47:34,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:47:56,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:47:56,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271671942] [2023-02-18 01:47:56,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:47:56,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327916116] [2023-02-18 01:47:56,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327916116] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:47:56,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:47:56,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-18 01:47:56,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357140617] [2023-02-18 01:47:56,688 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:47:56,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-18 01:47:56,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:47:56,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-18 01:47:56,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=445, Unknown=7, NotChecked=0, Total=552 [2023-02-18 01:47:56,690 INFO L87 Difference]: Start difference. First operand 73 states and 84 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:48:10,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:12,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:14,582 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:16,586 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:18,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:20,119 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:22,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:24,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:25,724 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:27,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:29,698 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:31,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:33,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:35,740 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:36,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:38,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:40,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:42,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:44,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:46,131 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:48,137 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:50,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:52,152 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:54,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:56,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:48:57,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:49:00,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 01:49:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:49:01,305 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2023-02-18 01:49:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-18 01:49:01,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2023-02-18 01:49:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:49:01,308 INFO L225 Difference]: With dead ends: 116 [2023-02-18 01:49:01,308 INFO L226 Difference]: Without dead ends: 114 [2023-02-18 01:49:01,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=127, Invalid=619, Unknown=10, NotChecked=0, Total=756 [2023-02-18 01:49:01,309 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 56 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 12 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 54.0s IncrementalHoareTripleChecker+Time [2023-02-18 01:49:01,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 376 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 447 Invalid, 19 Unknown, 0 Unchecked, 54.0s Time] [2023-02-18 01:49:01,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-18 01:49:01,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2023-02-18 01:49:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 80 states have internal predecessors, (91), 12 states have call successors, (12), 9 states have call predecessors, (12), 9 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-18 01:49:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2023-02-18 01:49:01,322 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 49 [2023-02-18 01:49:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:49:01,322 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2023-02-18 01:49:01,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 14 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:49:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2023-02-18 01:49:01,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 01:49:01,323 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:49:01,323 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:49:01,331 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 01:49:01,529 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 01:49:01,529 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:49:01,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:49:01,529 INFO L85 PathProgramCache]: Analyzing trace with hash 395678384, now seen corresponding path program 1 times [2023-02-18 01:49:01,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:49:01,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031579806] [2023-02-18 01:49:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:49:01,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:49:01,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:49:01,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105242078] [2023-02-18 01:49:01,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:49:01,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:49:01,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:49:01,539 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 01:49:01,541 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 01:49:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:49:01,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-18 01:49:01,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:49:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 31 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 01:49:01,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:49:01,668 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-18 01:49:01,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:49:01,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031579806] [2023-02-18 01:49:01,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:49:01,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105242078] [2023-02-18 01:49:01,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105242078] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:49:01,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:49:01,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-18 01:49:01,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592307912] [2023-02-18 01:49:01,670 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:49:01,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 01:49:01,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:49:01,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 01:49:01,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-18 01:49:01,671 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-18 01:49:01,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:49:01,876 INFO L93 Difference]: Finished difference Result 374 states and 437 transitions. [2023-02-18 01:49:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-18 01:49:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 49 [2023-02-18 01:49:01,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:49:01,878 INFO L225 Difference]: With dead ends: 374 [2023-02-18 01:49:01,878 INFO L226 Difference]: Without dead ends: 367 [2023-02-18 01:49:01,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-02-18 01:49:01,879 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 184 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:49:01,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 269 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:49:01,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2023-02-18 01:49:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 326. [2023-02-18 01:49:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 252 states have (on average 1.2261904761904763) internal successors, (309), 261 states have internal predecessors, (309), 41 states have call successors, (41), 32 states have call predecessors, (41), 32 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 01:49:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 383 transitions. [2023-02-18 01:49:01,923 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 383 transitions. Word has length 49 [2023-02-18 01:49:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:49:01,924 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 383 transitions. [2023-02-18 01:49:01,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 18 states have internal predecessors, (68), 7 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2023-02-18 01:49:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 383 transitions. [2023-02-18 01:49:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-18 01:49:01,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:49:01,925 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:49:01,932 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 01:49:02,130 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 01:49:02,130 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:49:02,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:49:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash -2122494090, now seen corresponding path program 1 times [2023-02-18 01:49:02,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:49:02,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572167062] [2023-02-18 01:49:02,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:49:02,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:49:02,150 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:49:02,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [894724650] [2023-02-18 01:49:02,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:49:02,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:49:02,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:49:02,154 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 01:49:02,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-18 01:49:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:49:05,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-18 01:49:05,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:49:26,817 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 01:49:26,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:49:39,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:49:39,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572167062] [2023-02-18 01:49:39,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:49:39,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894724650] [2023-02-18 01:49:39,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894724650] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:49:39,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:49:39,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-18 01:49:39,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816836436] [2023-02-18 01:49:39,703 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:49:39,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-18 01:49:39,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:49:39,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-18 01:49:39,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=449, Unknown=4, NotChecked=0, Total=552 [2023-02-18 01:49:39,704 INFO L87 Difference]: Start difference. First operand 326 states and 383 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:49:49,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:49:51,151 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:49:54,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-02-18 01:49:56,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:49:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:49:57,371 INFO L93 Difference]: Finished difference Result 345 states and 403 transitions. [2023-02-18 01:49:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-18 01:49:57,373 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2023-02-18 01:49:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:49:57,375 INFO L225 Difference]: With dead ends: 345 [2023-02-18 01:49:57,375 INFO L226 Difference]: Without dead ends: 342 [2023-02-18 01:49:57,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 22.1s TimeCoverageRelationStatistics Valid=124, Invalid=628, Unknown=4, NotChecked=0, Total=756 [2023-02-18 01:49:57,376 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 38 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:49:57,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 329 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 439 Invalid, 3 Unknown, 0 Unchecked, 12.2s Time] [2023-02-18 01:49:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-02-18 01:49:57,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 326. [2023-02-18 01:49:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 252 states have (on average 1.2261904761904763) internal successors, (309), 261 states have internal predecessors, (309), 41 states have call successors, (41), 32 states have call predecessors, (41), 32 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 01:49:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 383 transitions. [2023-02-18 01:49:57,422 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 383 transitions. Word has length 49 [2023-02-18 01:49:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:49:57,422 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 383 transitions. [2023-02-18 01:49:57,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 15 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:49:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 383 transitions. [2023-02-18 01:49:57,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-18 01:49:57,423 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:49:57,424 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:49:57,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-18 01:49:57,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-18 01:49:57,632 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:49:57,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:49:57,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1797561273, now seen corresponding path program 1 times [2023-02-18 01:49:57,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:49:57,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325473855] [2023-02-18 01:49:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:49:57,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:49:57,650 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:49:57,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311574629] [2023-02-18 01:49:57,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:49:57,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:49:57,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:49:57,651 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:49:57,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-18 01:49:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 01:49:57,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-18 01:49:57,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:49:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-18 01:49:57,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:49:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-02-18 01:49:57,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:49:57,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325473855] [2023-02-18 01:49:57,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:49:57,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311574629] [2023-02-18 01:49:57,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311574629] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 01:49:57,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-18 01:49:57,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-18 01:49:57,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873324219] [2023-02-18 01:49:57,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-18 01:49:57,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 01:49:57,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:49:57,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 01:49:57,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-18 01:49:57,761 INFO L87 Difference]: Start difference. First operand 326 states and 383 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 01:49:57,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:49:57,901 INFO L93 Difference]: Finished difference Result 543 states and 627 transitions. [2023-02-18 01:49:57,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-18 01:49:57,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 51 [2023-02-18 01:49:57,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:49:57,904 INFO L225 Difference]: With dead ends: 543 [2023-02-18 01:49:57,904 INFO L226 Difference]: Without dead ends: 332 [2023-02-18 01:49:57,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 88 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 01:49:57,908 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 151 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 01:49:57,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 178 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 01:49:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-02-18 01:49:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 326. [2023-02-18 01:49:57,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 252 states have (on average 1.2023809523809523) internal successors, (303), 261 states have internal predecessors, (303), 41 states have call successors, (41), 32 states have call predecessors, (41), 32 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-18 01:49:57,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 377 transitions. [2023-02-18 01:49:57,953 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 377 transitions. Word has length 51 [2023-02-18 01:49:57,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:49:57,953 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 377 transitions. [2023-02-18 01:49:57,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-18 01:49:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 377 transitions. [2023-02-18 01:49:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 01:49:57,954 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:49:57,954 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:49:57,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-18 01:49:58,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-18 01:49:58,160 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:49:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:49:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1519157991, now seen corresponding path program 5 times [2023-02-18 01:49:58,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:49:58,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67552160] [2023-02-18 01:49:58,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:49:58,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:49:58,172 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:49:58,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2022893843] [2023-02-18 01:49:58,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 01:49:58,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:49:58,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:49:58,174 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:49:58,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-18 01:56:56,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-02-18 01:56:56,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:56:56,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-18 01:56:56,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:57:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 01:57:16,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 01:57:43,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 01:57:43,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67552160] [2023-02-18 01:57:43,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-18 01:57:43,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022893843] [2023-02-18 01:57:43,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022893843] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 01:57:43,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-18 01:57:43,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-18 01:57:43,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389681626] [2023-02-18 01:57:43,493 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-18 01:57:43,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-18 01:57:43,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 01:57:43,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-18 01:57:43,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=568, Unknown=8, NotChecked=0, Total=702 [2023-02-18 01:57:43,494 INFO L87 Difference]: Start difference. First operand 326 states and 377 transitions. Second operand has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:57:50,008 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse1 (div (+ (- |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~r~0#1|) (- 8))) (.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse5 (mod (+ (* 4294967295 |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~A~0#1|) 4294967296))) (and (= (* 2 1) |c_ULTIMATE.start_main_~q~0#1|) (not (>= .cse0 (* 16 (mod .cse1 268435456)))) (>= .cse2 1) (<= 0 .cse1) (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 7 |c_ULTIMATE.start_main_~A~0#1|)) 8) 0) (< .cse1 268435456) (< .cse2 2147483647) (exists ((|aux_div_ULTIMATE.start_main_~B~0#1_44| Int)) (let ((.cse4 (+ .cse1 (* 268435456 |aux_div_ULTIMATE.start_main_~B~0#1_44|)))) (let ((.cse3 (mod .cse4 4294967296))) (and (>= .cse3 1) (>= .cse0 (* (mod .cse4 2147483648) 2)) (not (= .cse5 .cse3)) (< .cse3 2147483647))))) (let ((.cse8 (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~A~0#1|) 2) 0)) (.cse7 (< .cse5 0)) (.cse6 (div .cse5 2))) (or (and (= (+ .cse6 1) |c_ULTIMATE.start_main_~b~0#1|) .cse7 (not .cse8)) (and (or .cse8 (not .cse7)) (= |c_ULTIMATE.start_main_~b~0#1| .cse6)))) (>= .cse0 .cse5))) is different from false [2023-02-18 01:57:52,229 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:57:54,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-18 01:57:57,201 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (mod |c_ULTIMATE.start_main_~B~0#1| 4294967296)) (.cse1 (div (+ (- |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~b~0#1|) (- 8))) (.cse0 (mod |c_ULTIMATE.start_main_~A~0#1| 4294967296)) (.cse5 (mod (+ (* 4294967295 |c_ULTIMATE.start_main_~r~0#1|) |c_ULTIMATE.start_main_~A~0#1| (* 4294967295 |c_ULTIMATE.start_main_~b~0#1|)) 4294967296))) (and (not (>= .cse0 (* 16 (mod .cse1 268435456)))) (let ((.cse4 (div .cse5 2)) (.cse3 (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~A~0#1| |c_ULTIMATE.start_main_~b~0#1|) 2) 0)) (.cse2 (< .cse5 0))) (or (and (or (not .cse2) .cse3) (= .cse4 |c_ULTIMATE.start_main_~b~0#1|)) (and (= (+ .cse4 1) |c_ULTIMATE.start_main_~b~0#1|) (not .cse3) .cse2))) (< .cse1 268435456) (>= .cse6 1) (exists ((|aux_div_ULTIMATE.start_main_~B~0#1_44| Int)) (let ((.cse7 (+ .cse1 (* 268435456 |aux_div_ULTIMATE.start_main_~B~0#1_44|)))) (let ((.cse8 (mod .cse7 4294967296))) (and (>= .cse0 (* 2 (mod .cse7 2147483648))) (not (= .cse5 .cse8)) (< .cse8 2147483647) (>= .cse8 1))))) (= (mod (+ |c_ULTIMATE.start_main_~r~0#1| (* 7 |c_ULTIMATE.start_main_~A~0#1|) |c_ULTIMATE.start_main_~b~0#1|) 8) 0) (< .cse6 2147483647) (= (+ (* 2 1) 1) |c_ULTIMATE.start_main_~q~0#1|) (<= 0 .cse1) (>= .cse0 .cse5) (>= (mod (+ |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~b~0#1|) 4294967296) (mod |c_ULTIMATE.start_main_~b~0#1| 4294967296)))) is different from false [2023-02-18 01:57:58,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 01:57:58,147 INFO L93 Difference]: Finished difference Result 407 states and 483 transitions. [2023-02-18 01:57:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 01:57:58,147 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 52 [2023-02-18 01:57:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 01:57:58,148 INFO L225 Difference]: With dead ends: 407 [2023-02-18 01:57:58,148 INFO L226 Difference]: Without dead ends: 405 [2023-02-18 01:57:58,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=147, Invalid=721, Unknown=10, NotChecked=114, Total=992 [2023-02-18 01:57:58,149 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 44 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-02-18 01:57:58,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 471 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 630 Invalid, 1 Unknown, 3 Unchecked, 8.2s Time] [2023-02-18 01:57:58,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-02-18 01:57:58,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 351. [2023-02-18 01:57:58,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 271 states have (on average 1.1955719557195572) internal successors, (324), 281 states have internal predecessors, (324), 44 states have call successors, (44), 35 states have call predecessors, (44), 35 states have return successors, (36), 34 states have call predecessors, (36), 36 states have call successors, (36) [2023-02-18 01:57:58,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 404 transitions. [2023-02-18 01:57:58,195 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 404 transitions. Word has length 52 [2023-02-18 01:57:58,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 01:57:58,195 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 404 transitions. [2023-02-18 01:57:58,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 17 states have internal predecessors, (40), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-18 01:57:58,195 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 404 transitions. [2023-02-18 01:57:58,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-18 01:57:58,196 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 01:57:58,196 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 01:57:58,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-18 01:57:58,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:57:58,409 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 01:57:58,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 01:57:58,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1000801943, now seen corresponding path program 2 times [2023-02-18 01:57:58,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 01:57:58,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197719615] [2023-02-18 01:57:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 01:57:58,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 01:57:58,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-18 01:57:58,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [665539236] [2023-02-18 01:57:58,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 01:57:58,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 01:57:58,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 01:57:58,417 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-18 01:57:58,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-18 01:57:59,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 01:57:59,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 01:57:59,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-18 01:57:59,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 01:58:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 33 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 01:58:17,962 INFO L328 TraceCheckSpWp]: Computing backward predicates...