./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-15 00:36:58,226 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 00:36:58,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 00:36:58,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 00:36:58,257 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 00:36:58,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 00:36:58,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 00:36:58,262 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 00:36:58,263 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 00:36:58,266 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 00:36:58,267 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 00:36:58,269 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 00:36:58,269 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 00:36:58,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 00:36:58,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 00:36:58,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 00:36:58,273 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 00:36:58,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 00:36:58,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 00:36:58,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 00:36:58,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 00:36:58,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 00:36:58,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 00:36:58,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 00:36:58,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 00:36:58,295 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 00:36:58,295 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 00:36:58,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 00:36:58,297 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 00:36:58,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 00:36:58,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 00:36:58,298 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 00:36:58,299 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 00:36:58,300 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 00:36:58,300 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 00:36:58,301 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 00:36:58,301 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 00:36:58,301 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 00:36:58,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 00:36:58,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 00:36:58,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 00:36:58,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 00:36:58,325 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 00:36:58,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 00:36:58,325 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 00:36:58,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 00:36:58,331 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 00:36:58,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 00:36:58,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 00:36:58,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 00:36:58,332 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 00:36:58,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 00:36:58,332 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 00:36:58,333 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 00:36:58,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 00:36:58,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 00:36:58,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 00:36:58,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 00:36:58,333 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 00:36:58,334 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 00:36:58,334 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 00:36:58,334 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 00:36:58,334 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 00:36:58,334 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 00:36:58,335 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 00:36:58,335 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 00:36:58,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 00:36:58,335 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 00:36:58,335 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 00:36:58,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 00:36:58,336 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 00:36:58,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 00:36:58,336 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 00:36:58,336 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 00:36:58,336 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 00:36:58,337 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 00:36:58,337 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 00:36:58,337 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 787aa3251fe70c0757344936f9e5c92841f1fb61138cb758df556e9684a50783 [2023-02-15 00:36:58,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 00:36:58,550 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 00:36:58,551 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 00:36:58,552 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 00:36:58,552 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 00:36:58,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2023-02-15 00:36:59,549 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 00:36:59,680 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 00:36:59,681 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound100.c [2023-02-15 00:36:59,684 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a4c5be3d/7014acd844b94b30b65e14e946073f0a/FLAGa0de5881b [2023-02-15 00:36:59,693 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a4c5be3d/7014acd844b94b30b65e14e946073f0a [2023-02-15 00:36:59,695 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 00:36:59,695 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 00:36:59,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 00:36:59,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 00:36:59,700 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 00:36:59,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,701 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20fa55b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59, skipping insertion in model container [2023-02-15 00:36:59,701 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,705 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 00:36:59,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 00:36:59,815 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/ps4-ll_valuebound100.c[458,471] [2023-02-15 00:36:59,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 00:36:59,841 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 00:36:59,852 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/ps4-ll_valuebound100.c[458,471] [2023-02-15 00:36:59,865 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 00:36:59,873 INFO L208 MainTranslator]: Completed translation [2023-02-15 00:36:59,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59 WrapperNode [2023-02-15 00:36:59,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 00:36:59,875 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 00:36:59,875 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 00:36:59,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 00:36:59,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,896 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2023-02-15 00:36:59,896 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 00:36:59,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 00:36:59,897 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 00:36:59,897 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 00:36:59,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,918 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,921 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,922 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,922 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 00:36:59,927 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 00:36:59,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 00:36:59,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 00:36:59,928 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59" (1/1) ... [2023-02-15 00:36:59,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 00:36:59,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:36:59,953 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) [2023-02-15 00:36:59,959 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 [2023-02-15 00:36:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 00:36:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 00:36:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 00:36:59,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 00:36:59,984 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 00:36:59,984 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 00:37:00,026 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 00:37:00,027 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 00:37:00,161 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 00:37:00,179 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 00:37:00,179 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 00:37:00,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:37:00 BoogieIcfgContainer [2023-02-15 00:37:00,181 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 00:37:00,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 00:37:00,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 00:37:00,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 00:37:00,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:36:59" (1/3) ... [2023-02-15 00:37:00,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157e1253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:37:00, skipping insertion in model container [2023-02-15 00:37:00,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:36:59" (2/3) ... [2023-02-15 00:37:00,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@157e1253 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:37:00, skipping insertion in model container [2023-02-15 00:37:00,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:37:00" (3/3) ... [2023-02-15 00:37:00,186 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.c [2023-02-15 00:37:00,196 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 00:37:00,208 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 00:37:00,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 00:37:00,259 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;@2e2658d1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 00:37:00,259 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 00:37:00,279 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 00:37:00,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 00:37:00,283 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:37:00,284 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:37:00,284 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:37:00,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:37:00,287 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2023-02-15 00:37:00,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:37:00,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583063307] [2023-02-15 00:37:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:37:00,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:37:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:37:00,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:37:00,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583063307] [2023-02-15 00:37:00,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 00:37:00,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309478741] [2023-02-15 00:37:00,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:37:00,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:37:00,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:37:00,421 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) [2023-02-15 00:37:00,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 00:37:00,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:37:00,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 00:37:00,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:37:00,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:37:00,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 00:37:00,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309478741] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:37:00,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:37:00,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 00:37:00,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793123358] [2023-02-15 00:37:00,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:37:00,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 00:37:00,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:37:00,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 00:37:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 00:37:00,535 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:37:00,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:37:00,548 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2023-02-15 00:37:00,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 00:37:00,549 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-15 00:37:00,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:37:00,553 INFO L225 Difference]: With dead ends: 35 [2023-02-15 00:37:00,554 INFO L226 Difference]: Without dead ends: 15 [2023-02-15 00:37:00,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 00:37:00,558 INFO L413 NwaCegarLoop]: 21 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, 21 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 [2023-02-15 00:37:00,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:37:00,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-15 00:37:00,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-15 00:37:00,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 00:37:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-15 00:37:00,580 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2023-02-15 00:37:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:37:00,580 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-15 00:37:00,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:37:00,581 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-15 00:37:00,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 00:37:00,581 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:37:00,581 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:37:00,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 00:37:00,781 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 [2023-02-15 00:37:00,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:37:00,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:37:00,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2023-02-15 00:37:00,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:37:00,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954754897] [2023-02-15 00:37:00,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:37:00,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:37:00,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:37:00,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [983306721] [2023-02-15 00:37:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:37:00,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:37:00,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:37:00,800 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) [2023-02-15 00:37:00,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 00:37:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:37:00,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 00:37:00,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:37:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:37:00,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 00:37:00,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:37:00,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954754897] [2023-02-15 00:37:00,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:37:00,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983306721] [2023-02-15 00:37:00,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983306721] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:37:00,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:37:00,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 00:37:00,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449257027] [2023-02-15 00:37:00,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:37:00,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 00:37:00,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:37:00,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 00:37:00,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 00:37:00,924 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:37:00,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:37:00,962 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2023-02-15 00:37:00,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 00:37:00,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-15 00:37:00,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:37:00,963 INFO L225 Difference]: With dead ends: 26 [2023-02-15 00:37:00,963 INFO L226 Difference]: Without dead ends: 22 [2023-02-15 00:37:00,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 00:37:00,964 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:37:00,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:37:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-15 00:37:00,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-15 00:37:00,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 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) [2023-02-15 00:37:00,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-15 00:37:00,970 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2023-02-15 00:37:00,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:37:00,970 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-15 00:37:00,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 00:37:00,971 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-15 00:37:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 00:37:00,971 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:37:00,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:37:00,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 00:37:01,176 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 [2023-02-15 00:37:01,176 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:37:01,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:37:01,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2023-02-15 00:37:01,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:37:01,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235881942] [2023-02-15 00:37:01,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:37:01,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:37:01,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:37:01,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1221041064] [2023-02-15 00:37:01,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:37:01,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:37:01,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:37:01,192 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) [2023-02-15 00:37:01,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 00:37:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:37:01,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 00:37:01,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:37:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:37:01,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:37:02,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:37:02,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:37:02,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235881942] [2023-02-15 00:37:02,038 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:37:02,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221041064] [2023-02-15 00:37:02,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221041064] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:37:02,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 00:37:02,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-02-15 00:37:02,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233814490] [2023-02-15 00:37:02,038 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 00:37:02,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 00:37:02,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:37:02,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 00:37:02,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-02-15 00:37:02,040 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 00:37:02,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:37:02,152 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2023-02-15 00:37:02,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 00:37:02,152 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-02-15 00:37:02,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:37:02,153 INFO L225 Difference]: With dead ends: 33 [2023-02-15 00:37:02,153 INFO L226 Difference]: Without dead ends: 27 [2023-02-15 00:37:02,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-15 00:37:02,154 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:37:02,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 39 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:37:02,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-15 00:37:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-02-15 00:37:02,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 00:37:02,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-02-15 00:37:02,160 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2023-02-15 00:37:02,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:37:02,160 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-02-15 00:37:02,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 00:37:02,160 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-02-15 00:37:02,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-15 00:37:02,161 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:37:02,161 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:37:02,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 00:37:02,365 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 [2023-02-15 00:37:02,365 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:37:02,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:37:02,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1711372296, now seen corresponding path program 1 times [2023-02-15 00:37:02,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:37:02,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490822057] [2023-02-15 00:37:02,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:37:02,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:37:02,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:37:02,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2073116325] [2023-02-15 00:37:02,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:37:02,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:37:02,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:37:02,409 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) [2023-02-15 00:37:02,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 00:37:02,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:37:02,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 00:37:02,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:37:02,539 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 00:37:02,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:37:38,098 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) 4) 0)))) is different from true [2023-02-15 00:37:56,143 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| Int)) (or (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_3| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) (= (mod (+ (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 3 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|) (* 2 |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_8|)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-15 00:38:02,184 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2023-02-15 00:38:04,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:38:04,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490822057] [2023-02-15 00:38:04,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:38:04,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073116325] [2023-02-15 00:38:04,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073116325] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:38:04,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 00:38:04,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-02-15 00:38:04,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305472644] [2023-02-15 00:38:04,204 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 00:38:04,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 00:38:04,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:38:04,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 00:38:04,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=122, Unknown=4, NotChecked=72, Total=240 [2023-02-15 00:38:04,205 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 00:38:04,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:38:04,288 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2023-02-15 00:38:04,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 00:38:04,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-02-15 00:38:04,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:38:04,289 INFO L225 Difference]: With dead ends: 31 [2023-02-15 00:38:04,289 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 00:38:04,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=62, Invalid=186, Unknown=4, NotChecked=90, Total=342 [2023-02-15 00:38:04,290 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:38:04,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:38:04,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 00:38:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-15 00:38:04,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-15 00:38:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-02-15 00:38:04,295 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2023-02-15 00:38:04,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:38:04,295 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-02-15 00:38:04,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 00:38:04,295 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-02-15 00:38:04,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-15 00:38:04,296 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:38:04,296 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:38:04,303 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 00:38:04,500 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 [2023-02-15 00:38:04,500 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:38:04,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:38:04,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1075497887, now seen corresponding path program 2 times [2023-02-15 00:38:04,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:38:04,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937468363] [2023-02-15 00:38:04,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:38:04,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:38:04,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:38:04,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1378324702] [2023-02-15 00:38:04,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:38:04,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:38:04,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:38:04,508 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) [2023-02-15 00:38:04,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 00:38:04,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:38:04,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:38:04,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 00:38:04,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:38:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-15 00:38:04,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:38:12,789 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2023-02-15 00:38:12,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:38:12,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937468363] [2023-02-15 00:38:12,791 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:38:12,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378324702] [2023-02-15 00:38:12,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378324702] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:38:12,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 00:38:12,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-15 00:38:12,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451845114] [2023-02-15 00:38:12,792 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 00:38:12,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 00:38:12,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:38:12,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 00:38:12,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=148, Unknown=1, NotChecked=24, Total=210 [2023-02-15 00:38:12,793 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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) [2023-02-15 00:38:12,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:38:12,879 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2023-02-15 00:38:12,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 00:38:12,879 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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) Word has length 29 [2023-02-15 00:38:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:38:12,880 INFO L225 Difference]: With dead ends: 34 [2023-02-15 00:38:12,880 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 00:38:12,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2023-02-15 00:38:12,881 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:38:12,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 68 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:38:12,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 00:38:12,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-15 00:38:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 00:38:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-02-15 00:38:12,887 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2023-02-15 00:38:12,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:38:12,888 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-02-15 00:38:12,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 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) [2023-02-15 00:38:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-02-15 00:38:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 00:38:12,889 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:38:12,889 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:38:12,904 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-15 00:38:13,097 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 [2023-02-15 00:38:13,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:38:13,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:38:13,097 INFO L85 PathProgramCache]: Analyzing trace with hash 817917912, now seen corresponding path program 3 times [2023-02-15 00:38:13,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:38:13,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988194503] [2023-02-15 00:38:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:38:13,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:38:13,106 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:38:13,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [937531506] [2023-02-15 00:38:13,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:38:13,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:38:13,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:38:13,108 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) [2023-02-15 00:38:13,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 00:38:13,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 00:38:13,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:38:13,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 00:38:13,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:38:13,331 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 00:38:13,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:38:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-15 00:38:13,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:38:13,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988194503] [2023-02-15 00:38:13,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:38:13,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937531506] [2023-02-15 00:38:13,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937531506] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:38:13,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 00:38:13,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2023-02-15 00:38:13,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525191431] [2023-02-15 00:38:13,529 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 00:38:13,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 00:38:13,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:38:13,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 00:38:13,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-02-15 00:38:13,531 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 10 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 00:38:14,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:38:14,128 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2023-02-15 00:38:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 00:38:14,129 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 10 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 36 [2023-02-15 00:38:14,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:38:14,129 INFO L225 Difference]: With dead ends: 47 [2023-02-15 00:38:14,130 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 00:38:14,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2023-02-15 00:38:14,131 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:38:14,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 126 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:38:14,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 00:38:14,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-15 00:38:14,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 00:38:14,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2023-02-15 00:38:14,145 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 36 [2023-02-15 00:38:14,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:38:14,145 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2023-02-15 00:38:14,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 10 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 00:38:14,146 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2023-02-15 00:38:14,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 00:38:14,147 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:38:14,147 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:38:14,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 00:38:14,351 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 [2023-02-15 00:38:14,351 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:38:14,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:38:14,352 INFO L85 PathProgramCache]: Analyzing trace with hash 385378200, now seen corresponding path program 4 times [2023-02-15 00:38:14,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:38:14,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409624216] [2023-02-15 00:38:14,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:38:14,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:38:14,359 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:38:14,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362445084] [2023-02-15 00:38:14,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:38:14,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:38:14,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:38:14,361 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) [2023-02-15 00:38:14,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 00:38:14,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:38:14,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:38:14,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 00:38:14,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:38:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 36 proven. 85 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-15 00:38:14,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:39:02,945 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18|))))) is different from true [2023-02-15 00:39:21,457 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| Int)) (or (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| 2)) 4) 0) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_32| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_18|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-15 00:39:27,525 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2023-02-15 00:39:29,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:39:29,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409624216] [2023-02-15 00:39:29,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:39:29,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362445084] [2023-02-15 00:39:29,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362445084] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:39:29,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 00:39:29,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-15 00:39:29,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445092292] [2023-02-15 00:39:29,542 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 00:39:29,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 00:39:29,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:39:29,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 00:39:29,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=293, Unknown=7, NotChecked=108, Total=462 [2023-02-15 00:39:29,543 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 00:39:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:39:29,801 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2023-02-15 00:39:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 00:39:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 64 [2023-02-15 00:39:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:39:29,803 INFO L225 Difference]: With dead ends: 49 [2023-02-15 00:39:29,803 INFO L226 Difference]: Without dead ends: 44 [2023-02-15 00:39:29,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=74, Invalid=393, Unknown=7, NotChecked=126, Total=600 [2023-02-15 00:39:29,804 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 00:39:29,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 186 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 00:39:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-15 00:39:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-02-15 00:39:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 00:39:29,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2023-02-15 00:39:29,817 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2023-02-15 00:39:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:39:29,818 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2023-02-15 00:39:29,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-15 00:39:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2023-02-15 00:39:29,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 00:39:29,823 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:39:29,824 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:39:29,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-15 00:39:30,030 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 [2023-02-15 00:39:30,030 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:39:30,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:39:30,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2073985217, now seen corresponding path program 5 times [2023-02-15 00:39:30,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:39:30,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007670679] [2023-02-15 00:39:30,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:39:30,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:39:30,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:39:30,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [98079379] [2023-02-15 00:39:30,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 00:39:30,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:39:30,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:39:30,053 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) [2023-02-15 00:39:30,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 00:39:30,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-02-15 00:39:30,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:39:30,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 00:39:30,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:39:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 20 proven. 130 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-15 00:39:30,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:39:30,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:39:30,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007670679] [2023-02-15 00:39:30,528 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:39:30,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98079379] [2023-02-15 00:39:30,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98079379] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:39:30,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 00:39:30,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-02-15 00:39:30,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911038514] [2023-02-15 00:39:30,529 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 00:39:30,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 00:39:30,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:39:30,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 00:39:30,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-02-15 00:39:30,530 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 00:39:30,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:39:30,810 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-02-15 00:39:30,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 00:39:30,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2023-02-15 00:39:30,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:39:30,811 INFO L225 Difference]: With dead ends: 52 [2023-02-15 00:39:30,811 INFO L226 Difference]: Without dead ends: 47 [2023-02-15 00:39:30,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2023-02-15 00:39:30,811 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 00:39:30,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 214 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 00:39:30,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-15 00:39:30,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-02-15 00:39:30,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 00:39:30,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2023-02-15 00:39:30,825 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2023-02-15 00:39:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:39:30,827 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2023-02-15 00:39:30,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-02-15 00:39:30,827 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2023-02-15 00:39:30,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-15 00:39:30,828 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:39:30,828 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:39:30,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 00:39:31,032 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 [2023-02-15 00:39:31,033 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:39:31,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:39:31,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1353348984, now seen corresponding path program 6 times [2023-02-15 00:39:31,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:39:31,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135130608] [2023-02-15 00:39:31,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:39:31,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:39:31,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:39:31,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239079323] [2023-02-15 00:39:31,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 00:39:31,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:39:31,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:39:31,044 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) [2023-02-15 00:39:31,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 00:39:31,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-15 00:39:31,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:39:31,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 00:39:31,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:39:31,491 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 28 proven. 154 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-15 00:39:31,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:39:31,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:39:31,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135130608] [2023-02-15 00:39:31,713 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:39:31,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239079323] [2023-02-15 00:39:31,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239079323] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:39:31,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 00:39:31,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-02-15 00:39:31,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215777300] [2023-02-15 00:39:31,713 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 00:39:31,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 00:39:31,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:39:31,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 00:39:31,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-02-15 00:39:31,715 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 00:39:32,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:39:32,024 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2023-02-15 00:39:32,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 00:39:32,025 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 78 [2023-02-15 00:39:32,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:39:32,028 INFO L225 Difference]: With dead ends: 55 [2023-02-15 00:39:32,028 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 00:39:32,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2023-02-15 00:39:32,030 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 6 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 00:39:32,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 244 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 00:39:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 00:39:32,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-15 00:39:32,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 00:39:32,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2023-02-15 00:39:32,043 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2023-02-15 00:39:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:39:32,044 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2023-02-15 00:39:32,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-15 00:39:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2023-02-15 00:39:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-15 00:39:32,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:39:32,045 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:39:32,054 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 00:39:32,251 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 [2023-02-15 00:39:32,252 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:39:32,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:39:32,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1817498849, now seen corresponding path program 7 times [2023-02-15 00:39:32,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:39:32,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444949240] [2023-02-15 00:39:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:39:32,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:39:32,258 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:39:32,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400620805] [2023-02-15 00:39:32,259 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 00:39:32,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:39:32,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:39:32,271 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) [2023-02-15 00:39:32,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 00:39:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:39:32,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-15 00:39:32,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:39:32,572 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 51 proven. 166 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-15 00:39:32,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:40:18,232 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27| Int)) (or (= 0 (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 3)) 4)) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|))))) is different from true [2023-02-15 00:40:36,272 WARN L859 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| Int) (|v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27| Int)) (or (= 0 (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| 3)) 4)) (= (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~k~0#1_BEFORE_CALL_27|) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_68|)))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-02-15 00:40:42,295 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2023-02-15 00:40:44,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:40:44,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444949240] [2023-02-15 00:40:44,308 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:40:44,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400620805] [2023-02-15 00:40:44,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400620805] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:40:44,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 00:40:44,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-15 00:40:44,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675016502] [2023-02-15 00:40:44,309 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 00:40:44,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 00:40:44,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:40:44,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 00:40:44,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=408, Unknown=6, NotChecked=126, Total=600 [2023-02-15 00:40:44,310 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 00:40:44,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:40:44,661 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2023-02-15 00:40:44,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 00:40:44,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 85 [2023-02-15 00:40:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:40:44,662 INFO L225 Difference]: With dead ends: 58 [2023-02-15 00:40:44,663 INFO L226 Difference]: Without dead ends: 53 [2023-02-15 00:40:44,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=80, Invalid=526, Unknown=6, NotChecked=144, Total=756 [2023-02-15 00:40:44,663 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 7 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 00:40:44,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 260 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 00:40:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-15 00:40:44,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-15 00:40:44,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 00:40:44,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2023-02-15 00:40:44,673 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 85 [2023-02-15 00:40:44,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:40:44,673 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2023-02-15 00:40:44,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 00:40:44,673 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2023-02-15 00:40:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-15 00:40:44,674 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:40:44,674 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:40:44,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 00:40:44,878 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 [2023-02-15 00:40:44,879 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:40:44,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:40:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash 638795608, now seen corresponding path program 8 times [2023-02-15 00:40:44,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:40:44,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856348558] [2023-02-15 00:40:44,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:40:44,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:40:44,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:40:44,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053684289] [2023-02-15 00:40:44,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:40:44,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:40:44,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:40:44,890 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) [2023-02-15 00:40:44,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 00:40:44,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:40:44,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:40:44,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-15 00:40:44,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:40:45,224 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 53 proven. 202 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-02-15 00:40:45,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:40:51,376 WARN L837 $PredicateComparison]: unable to prove that (or (forall ((|ULTIMATE.start_main_~k~0#1| Int)) (or (not (< |c_ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (< (+ |c_ULTIMATE.start_main_~c~0#1| 1) |ULTIMATE.start_main_~k~0#1|) (= (+ |ULTIMATE.start_main_~k~0#1| (* |c_ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~k~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2) 1)))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2023-02-15 00:40:51,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:40:51,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856348558] [2023-02-15 00:40:51,378 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:40:51,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053684289] [2023-02-15 00:40:51,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053684289] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:40:51,378 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 00:40:51,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-15 00:40:51,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189144530] [2023-02-15 00:40:51,378 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 00:40:51,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 00:40:51,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:40:51,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 00:40:51,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=445, Unknown=1, NotChecked=42, Total=552 [2023-02-15 00:40:51,379 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 00:40:51,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:40:51,762 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2023-02-15 00:40:51,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 00:40:51,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 92 [2023-02-15 00:40:51,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:40:51,763 INFO L225 Difference]: With dead ends: 61 [2023-02-15 00:40:51,763 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 00:40:51,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=83, Invalid=570, Unknown=1, NotChecked=48, Total=702 [2023-02-15 00:40:51,764 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 00:40:51,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 310 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 00:40:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 00:40:51,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-02-15 00:40:51,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 14 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 00:40:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2023-02-15 00:40:51,775 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 92 [2023-02-15 00:40:51,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:40:51,775 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2023-02-15 00:40:51,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 states have internal predecessors, (37), 13 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 00:40:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2023-02-15 00:40:51,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-15 00:40:51,776 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:40:51,776 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:40:51,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 00:40:51,976 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 [2023-02-15 00:40:51,976 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:40:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:40:51,977 INFO L85 PathProgramCache]: Analyzing trace with hash 550859009, now seen corresponding path program 9 times [2023-02-15 00:40:51,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:40:51,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052400768] [2023-02-15 00:40:51,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:40:51,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:40:51,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:40:51,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1630669628] [2023-02-15 00:40:51,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:40:51,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:40:51,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:40:51,984 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) [2023-02-15 00:40:51,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 00:40:52,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2023-02-15 00:40:52,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:40:52,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 00:40:52,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:40:52,472 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 46 proven. 250 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-15 00:40:52,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:40:52,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:40:52,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052400768] [2023-02-15 00:40:52,584 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 00:40:52,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630669628] [2023-02-15 00:40:52,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630669628] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:40:52,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 00:40:52,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-15 00:40:52,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980715894] [2023-02-15 00:40:52,585 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 00:40:52,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 00:40:52,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:40:52,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 00:40:52,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2023-02-15 00:40:52,586 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 00:40:52,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:40:52,999 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2023-02-15 00:40:52,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 00:40:52,999 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 99 [2023-02-15 00:40:52,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:40:53,000 INFO L225 Difference]: With dead ends: 64 [2023-02-15 00:40:53,000 INFO L226 Difference]: Without dead ends: 59 [2023-02-15 00:40:53,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2023-02-15 00:40:53,001 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 7 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 00:40:53,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 328 Invalid, 795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 00:40:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-15 00:40:53,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-02-15 00:40:53,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 15 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2023-02-15 00:40:53,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2023-02-15 00:40:53,012 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 99 [2023-02-15 00:40:53,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:40:53,012 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2023-02-15 00:40:53,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-15 00:40:53,013 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2023-02-15 00:40:53,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-15 00:40:53,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:40:53,014 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:40:53,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 00:40:53,217 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 [2023-02-15 00:40:53,217 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:40:53,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:40:53,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1794064584, now seen corresponding path program 10 times [2023-02-15 00:40:53,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:40:53,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938868444] [2023-02-15 00:40:53,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:40:53,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:40:53,223 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 00:40:53,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [868391358] [2023-02-15 00:40:53,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:40:53,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:40:53,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:40:53,225 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) [2023-02-15 00:40:53,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 00:40:53,338 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:40:53,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:40:53,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-15 00:40:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:40:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 66 proven. 274 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-02-15 00:40:53,629 INFO L328 TraceCheckSpWp]: Computing backward predicates...