./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/hard2_unwindbound50.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 5506d4c7458a400c41a33af3f6404f1e04b9f2e97e99f1fb53b74acf6bf59baf --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 07:31:31,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 07:31:31,294 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 07:31:31,325 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 07:31:31,325 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 07:31:31,327 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 07:31:31,329 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 07:31:31,331 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 07:31:31,332 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 07:31:31,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 07:31:31,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 07:31:31,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 07:31:31,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 07:31:31,340 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 07:31:31,341 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 07:31:31,342 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 07:31:31,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 07:31:31,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 07:31:31,344 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 07:31:31,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 07:31:31,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 07:31:31,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 07:31:31,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 07:31:31,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 07:31:31,357 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 07:31:31,357 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 07:31:31,357 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 07:31:31,359 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 07:31:31,359 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 07:31:31,360 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 07:31:31,360 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 07:31:31,361 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 07:31:31,362 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 07:31:31,362 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 07:31:31,363 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 07:31:31,363 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 07:31:31,364 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 07:31:31,364 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 07:31:31,364 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 07:31:31,365 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 07:31:31,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 07:31:31,366 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 07:31:31,389 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 07:31:31,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 07:31:31,389 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 07:31:31,390 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 07:31:31,390 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 07:31:31,390 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 07:31:31,391 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 07:31:31,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 07:31:31,391 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 07:31:31,392 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 07:31:31,392 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 07:31:31,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 07:31:31,393 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 07:31:31,393 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 07:31:31,393 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 07:31:31,393 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 07:31:31,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 07:31:31,393 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 07:31:31,394 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 07:31:31,394 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 07:31:31,394 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 07:31:31,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 07:31:31,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 07:31:31,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 07:31:31,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:31:31,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 07:31:31,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 07:31:31,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 07:31:31,396 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 07:31:31,396 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 07:31:31,396 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 07:31:31,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 07:31:31,396 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 07:31:31,397 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 07:31:31,397 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 07:31:31,397 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5506d4c7458a400c41a33af3f6404f1e04b9f2e97e99f1fb53b74acf6bf59baf [2023-02-17 07:31:31,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 07:31:31,646 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 07:31:31,647 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 07:31:31,648 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 07:31:31,648 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 07:31:31,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.c [2023-02-17 07:31:32,675 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 07:31:32,836 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 07:31:32,836 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound50.c [2023-02-17 07:31:32,841 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86be3696b/be8a671a00b749bb90448f7964c19760/FLAGf3d48b84a [2023-02-17 07:31:32,855 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86be3696b/be8a671a00b749bb90448f7964c19760 [2023-02-17 07:31:32,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 07:31:32,857 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 07:31:32,859 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 07:31:32,859 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 07:31:32,861 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 07:31:32,862 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:31:32" (1/1) ... [2023-02-17 07:31:32,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e70a97a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:32, skipping insertion in model container [2023-02-17 07:31:32,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:31:32" (1/1) ... [2023-02-17 07:31:32,868 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 07:31:32,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 07:31:32,984 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/hard2_unwindbound50.c[526,539] [2023-02-17 07:31:33,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:31:33,015 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 07:31:33,024 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/hard2_unwindbound50.c[526,539] [2023-02-17 07:31:33,036 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 07:31:33,044 INFO L208 MainTranslator]: Completed translation [2023-02-17 07:31:33,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33 WrapperNode [2023-02-17 07:31:33,045 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 07:31:33,046 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 07:31:33,046 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 07:31:33,046 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 07:31:33,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33" (1/1) ... [2023-02-17 07:31:33,054 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33" (1/1) ... [2023-02-17 07:31:33,070 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-02-17 07:31:33,070 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 07:31:33,071 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 07:31:33,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 07:31:33,071 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 07:31:33,077 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33" (1/1) ... [2023-02-17 07:31:33,077 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33" (1/1) ... [2023-02-17 07:31:33,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33" (1/1) ... [2023-02-17 07:31:33,086 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33" (1/1) ... [2023-02-17 07:31:33,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33" (1/1) ... [2023-02-17 07:31:33,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33" (1/1) ... [2023-02-17 07:31:33,098 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33" (1/1) ... [2023-02-17 07:31:33,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33" (1/1) ... [2023-02-17 07:31:33,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 07:31:33,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 07:31:33,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 07:31:33,107 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 07:31:33,108 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33" (1/1) ... [2023-02-17 07:31:33,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 07:31:33,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:31:33,128 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) [2023-02-17 07:31:33,156 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 [2023-02-17 07:31:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 07:31:33,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 07:31:33,169 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 07:31:33,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 07:31:33,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 07:31:33,172 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 07:31:33,219 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 07:31:33,221 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 07:31:33,386 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 07:31:33,390 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 07:31:33,390 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 07:31:33,391 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:31:33 BoogieIcfgContainer [2023-02-17 07:31:33,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 07:31:33,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 07:31:33,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 07:31:33,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 07:31:33,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:31:32" (1/3) ... [2023-02-17 07:31:33,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc612b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:31:33, skipping insertion in model container [2023-02-17 07:31:33,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:31:33" (2/3) ... [2023-02-17 07:31:33,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fc612b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:31:33, skipping insertion in model container [2023-02-17 07:31:33,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:31:33" (3/3) ... [2023-02-17 07:31:33,410 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound50.c [2023-02-17 07:31:33,422 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 07:31:33,436 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 07:31:33,469 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 07:31:33,477 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;@4bb6a47e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 07:31:33,477 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 07:31:33,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 07:31:33,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 07:31:33,490 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:33,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:31:33,491 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:33,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:33,496 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2023-02-17 07:31:33,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:33,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481896420] [2023-02-17 07:31:33,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:33,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:33,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:31:33,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481896420] [2023-02-17 07:31:33,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 07:31:33,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149153555] [2023-02-17 07:31:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:33,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:33,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:31:33,624 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) [2023-02-17 07:31:33,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 07:31:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:33,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 07:31:33,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:31:33,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:31:33,692 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:31:33,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149153555] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:31:33,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:31:33,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 07:31:33,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189286428] [2023-02-17 07:31:33,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:31:33,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 07:31:33,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:31:33,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 07:31:33,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:31:33,721 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-02-17 07:31:33,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:31:33,736 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2023-02-17 07:31:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 07:31:33,737 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2023-02-17 07:31:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:31:33,742 INFO L225 Difference]: With dead ends: 50 [2023-02-17 07:31:33,742 INFO L226 Difference]: Without dead ends: 22 [2023-02-17 07:31:33,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 07:31:33,747 INFO L413 NwaCegarLoop]: 36 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, 36 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 [2023-02-17 07:31:33,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:31:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-17 07:31:33,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-17 07:31:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 07:31:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2023-02-17 07:31:33,771 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2023-02-17 07:31:33,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:31:33,772 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2023-02-17 07:31:33,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-02-17 07:31:33,772 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2023-02-17 07:31:33,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-17 07:31:33,772 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:33,773 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:31:33,778 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 07:31:33,978 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 [2023-02-17 07:31:33,978 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:33,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:33,979 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2023-02-17 07:31:33,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:33,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352325940] [2023-02-17 07:31:33,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:33,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:34,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:31:34,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:31:34,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352325940] [2023-02-17 07:31:34,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352325940] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:31:34,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:31:34,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 07:31:34,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250507973] [2023-02-17 07:31:34,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:31:34,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:31:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:31:34,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:31:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 07:31:34,124 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-02-17 07:31:34,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:31:34,162 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2023-02-17 07:31:34,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:31:34,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2023-02-17 07:31:34,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:31:34,164 INFO L225 Difference]: With dead ends: 36 [2023-02-17 07:31:34,164 INFO L226 Difference]: Without dead ends: 34 [2023-02-17 07:31:34,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 07:31:34,166 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:31:34,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:31:34,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-17 07:31:34,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2023-02-17 07:31:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 07:31:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2023-02-17 07:31:34,174 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2023-02-17 07:31:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:31:34,174 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2023-02-17 07:31:34,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-02-17 07:31:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2023-02-17 07:31:34,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-17 07:31:34,175 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:34,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:31:34,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 07:31:34,176 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:34,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:34,176 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2023-02-17 07:31:34,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:34,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444244753] [2023-02-17 07:31:34,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:34,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:34,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:31:34,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444244753] [2023-02-17 07:31:34,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 07:31:34,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327541208] [2023-02-17 07:31:34,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:34,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:34,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:31:34,194 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) [2023-02-17 07:31:34,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 07:31:34,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:34,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-17 07:31:34,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:31:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:31:34,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 07:31:34,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327541208] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:31:34,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:31:34,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 07:31:34,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394573983] [2023-02-17 07:31:34,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:31:34,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 07:31:34,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:31:34,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 07:31:34,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:31:34,267 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:31:34,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:31:34,295 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2023-02-17 07:31:34,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 07:31:34,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-17 07:31:34,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:31:34,297 INFO L225 Difference]: With dead ends: 42 [2023-02-17 07:31:34,297 INFO L226 Difference]: Without dead ends: 28 [2023-02-17 07:31:34,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 07:31:34,299 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:31:34,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:31:34,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-17 07:31:34,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-02-17 07:31:34,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 07:31:34,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2023-02-17 07:31:34,306 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2023-02-17 07:31:34,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:31:34,306 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2023-02-17 07:31:34,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 07:31:34,307 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2023-02-17 07:31:34,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-17 07:31:34,307 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:34,307 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:31:34,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 07:31:34,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-17 07:31:34,514 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:34,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:34,515 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2023-02-17 07:31:34,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:34,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814620126] [2023-02-17 07:31:34,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:34,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:34,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-17 07:31:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 07:31:34,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:31:34,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814620126] [2023-02-17 07:31:34,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814620126] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 07:31:34,645 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 07:31:34,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 07:31:34,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976845597] [2023-02-17 07:31:34,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 07:31:34,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 07:31:34,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:31:34,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 07:31:34,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 07:31:34,648 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 07:31:34,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:31:34,699 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2023-02-17 07:31:34,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 07:31:34,699 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-02-17 07:31:34,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:31:34,702 INFO L225 Difference]: With dead ends: 42 [2023-02-17 07:31:34,702 INFO L226 Difference]: Without dead ends: 40 [2023-02-17 07:31:34,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-17 07:31:34,708 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:31:34,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:31:34,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-17 07:31:34,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-02-17 07:31:34,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 07:31:34,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2023-02-17 07:31:34,719 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2023-02-17 07:31:34,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:31:34,719 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2023-02-17 07:31:34,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 07:31:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2023-02-17 07:31:34,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-17 07:31:34,720 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:34,720 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:31:34,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 07:31:34,720 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:34,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:34,721 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2023-02-17 07:31:34,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:34,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592537435] [2023-02-17 07:31:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:34,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:34,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:31:34,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [376118787] [2023-02-17 07:31:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:34,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:34,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:31:34,737 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) [2023-02-17 07:31:34,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 07:31:34,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:34,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 07:31:34,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:31:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 07:31:34,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:31:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 07:31:34,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:31:34,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592537435] [2023-02-17 07:31:34,968 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:31:34,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376118787] [2023-02-17 07:31:34,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376118787] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:31:34,968 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:31:34,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-02-17 07:31:34,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742432905] [2023-02-17 07:31:34,969 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:31:34,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 07:31:34,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:31:34,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 07:31:34,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-17 07:31:34,971 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 07:31:35,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:31:35,190 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2023-02-17 07:31:35,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 07:31:35,191 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 18 [2023-02-17 07:31:35,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:31:35,193 INFO L225 Difference]: With dead ends: 71 [2023-02-17 07:31:35,193 INFO L226 Difference]: Without dead ends: 56 [2023-02-17 07:31:35,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-17 07:31:35,194 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 33 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:31:35,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 82 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:31:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-17 07:31:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2023-02-17 07:31:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-02-17 07:31:35,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2023-02-17 07:31:35,205 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2023-02-17 07:31:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:31:35,205 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2023-02-17 07:31:35,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 07:31:35,205 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2023-02-17 07:31:35,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 07:31:35,206 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:35,206 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:31:35,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-17 07:31:35,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:35,413 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2023-02-17 07:31:35,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:35,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033296301] [2023-02-17 07:31:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:35,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:35,423 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:31:35,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238698145] [2023-02-17 07:31:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:35,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:35,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:31:35,461 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) [2023-02-17 07:31:35,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 07:31:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:35,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 07:31:35,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:31:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 07:31:35,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:31:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 07:31:35,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:31:35,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033296301] [2023-02-17 07:31:35,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:31:35,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238698145] [2023-02-17 07:31:35,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238698145] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:31:35,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:31:35,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-17 07:31:35,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671091461] [2023-02-17 07:31:35,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:31:35,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 07:31:35,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:31:35,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 07:31:35,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-17 07:31:35,585 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 07:31:35,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:31:35,690 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2023-02-17 07:31:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 07:31:35,690 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2023-02-17 07:31:35,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:31:35,691 INFO L225 Difference]: With dead ends: 73 [2023-02-17 07:31:35,691 INFO L226 Difference]: Without dead ends: 65 [2023-02-17 07:31:35,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-02-17 07:31:35,692 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:31:35,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 81 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:31:35,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-17 07:31:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2023-02-17 07:31:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 43 states have internal predecessors, (50), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-17 07:31:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2023-02-17 07:31:35,703 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 26 [2023-02-17 07:31:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:31:35,703 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2023-02-17 07:31:35,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-02-17 07:31:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2023-02-17 07:31:35,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 07:31:35,705 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:35,705 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:31:35,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 07:31:35,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:35,911 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:35,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash 847666457, now seen corresponding path program 1 times [2023-02-17 07:31:35,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:35,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881410234] [2023-02-17 07:31:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:35,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:35,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:31:35,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136311715] [2023-02-17 07:31:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:35,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:35,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:31:35,922 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) [2023-02-17 07:31:35,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 07:31:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:35,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 07:31:35,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:31:35,991 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 07:31:35,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:31:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-02-17 07:31:36,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:31:36,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881410234] [2023-02-17 07:31:36,007 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:31:36,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136311715] [2023-02-17 07:31:36,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136311715] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:31:36,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:31:36,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-02-17 07:31:36,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233843258] [2023-02-17 07:31:36,008 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:31:36,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 07:31:36,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:31:36,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 07:31:36,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-02-17 07:31:36,012 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-17 07:31:36,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:31:36,074 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2023-02-17 07:31:36,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 07:31:36,075 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2023-02-17 07:31:36,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:31:36,076 INFO L225 Difference]: With dead ends: 165 [2023-02-17 07:31:36,076 INFO L226 Difference]: Without dead ends: 127 [2023-02-17 07:31:36,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-02-17 07:31:36,079 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 34 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:31:36,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 137 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 07:31:36,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-17 07:31:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2023-02-17 07:31:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 83 states have internal predecessors, (94), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2023-02-17 07:31:36,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2023-02-17 07:31:36,104 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 33 [2023-02-17 07:31:36,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:31:36,105 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2023-02-17 07:31:36,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2023-02-17 07:31:36,105 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2023-02-17 07:31:36,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 07:31:36,106 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:36,106 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:31:36,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-17 07:31:36,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:36,313 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:36,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:36,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2023-02-17 07:31:36,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:36,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933081313] [2023-02-17 07:31:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:36,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:36,320 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:31:36,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2170303] [2023-02-17 07:31:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:36,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:36,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:31:36,322 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) [2023-02-17 07:31:36,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 07:31:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:36,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 07:31:36,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:31:36,393 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-02-17 07:31:36,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:31:36,431 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2023-02-17 07:31:36,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:31:36,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933081313] [2023-02-17 07:31:36,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:31:36,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2170303] [2023-02-17 07:31:36,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2170303] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:31:36,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:31:36,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-02-17 07:31:36,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285031455] [2023-02-17 07:31:36,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:31:36,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 07:31:36,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:31:36,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 07:31:36,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-02-17 07:31:36,435 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-17 07:31:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:31:36,555 INFO L93 Difference]: Finished difference Result 249 states and 307 transitions. [2023-02-17 07:31:36,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 07:31:36,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2023-02-17 07:31:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:31:36,558 INFO L225 Difference]: With dead ends: 249 [2023-02-17 07:31:36,558 INFO L226 Difference]: Without dead ends: 228 [2023-02-17 07:31:36,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-02-17 07:31:36,559 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 80 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:31:36,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 261 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:31:36,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2023-02-17 07:31:36,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2023-02-17 07:31:36,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 155 states have internal predecessors, (172), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2023-02-17 07:31:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 270 transitions. [2023-02-17 07:31:36,580 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 270 transitions. Word has length 49 [2023-02-17 07:31:36,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:31:36,581 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 270 transitions. [2023-02-17 07:31:36,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-17 07:31:36,581 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 270 transitions. [2023-02-17 07:31:36,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-17 07:31:36,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:36,583 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:31:36,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 07:31:36,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:36,789 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:36,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:36,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2023-02-17 07:31:36,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:36,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926116012] [2023-02-17 07:31:36,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:36,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:36,798 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:31:36,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [696864753] [2023-02-17 07:31:36,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:36,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:36,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:31:36,800 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) [2023-02-17 07:31:36,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 07:31:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:36,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-17 07:31:36,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:31:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-17 07:31:36,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:31:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-02-17 07:31:37,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:31:37,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926116012] [2023-02-17 07:31:37,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:31:37,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696864753] [2023-02-17 07:31:37,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696864753] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:31:37,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:31:37,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-02-17 07:31:37,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654735891] [2023-02-17 07:31:37,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:31:37,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 07:31:37,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:31:37,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 07:31:37,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-02-17 07:31:37,116 INFO L87 Difference]: Start difference. First operand 221 states and 270 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-17 07:31:38,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:31:38,767 INFO L93 Difference]: Finished difference Result 372 states and 479 transitions. [2023-02-17 07:31:38,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 07:31:38,767 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) Word has length 58 [2023-02-17 07:31:38,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:31:38,769 INFO L225 Difference]: With dead ends: 372 [2023-02-17 07:31:38,769 INFO L226 Difference]: Without dead ends: 299 [2023-02-17 07:31:38,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-02-17 07:31:38,770 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 62 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-02-17 07:31:38,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 131 Invalid, 457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-02-17 07:31:38,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-02-17 07:31:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 272. [2023-02-17 07:31:38,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.2258064516129032) internal successors, (228), 194 states have internal predecessors, (228), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2023-02-17 07:31:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2023-02-17 07:31:38,816 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 58 [2023-02-17 07:31:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:31:38,816 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2023-02-17 07:31:38,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 4 states have call predecessors, (16), 5 states have call successors, (16) [2023-02-17 07:31:38,817 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2023-02-17 07:31:38,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-17 07:31:38,818 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:38,818 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:31:38,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 07:31:39,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:39,024 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:39,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:39,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2023-02-17 07:31:39,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:39,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568338153] [2023-02-17 07:31:39,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:39,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:39,031 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:31:39,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653858628] [2023-02-17 07:31:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:39,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:39,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:31:39,033 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) [2023-02-17 07:31:39,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 07:31:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:39,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-17 07:31:39,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:31:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-17 07:31:39,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:31:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-02-17 07:31:39,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:31:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568338153] [2023-02-17 07:31:39,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:31:39,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653858628] [2023-02-17 07:31:39,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653858628] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:31:39,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:31:39,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-02-17 07:31:39,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335494757] [2023-02-17 07:31:39,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:31:39,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 07:31:39,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:31:39,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 07:31:39,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-02-17 07:31:39,260 INFO L87 Difference]: Start difference. First operand 272 states and 338 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 07:31:40,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:31:40,117 INFO L93 Difference]: Finished difference Result 341 states and 423 transitions. [2023-02-17 07:31:40,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 07:31:40,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 69 [2023-02-17 07:31:40,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:31:40,121 INFO L225 Difference]: With dead ends: 341 [2023-02-17 07:31:40,121 INFO L226 Difference]: Without dead ends: 260 [2023-02-17 07:31:40,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2023-02-17 07:31:40,122 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 35 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 07:31:40,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 137 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 07:31:40,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-02-17 07:31:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2023-02-17 07:31:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 165 states have internal predecessors, (190), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2023-02-17 07:31:40,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2023-02-17 07:31:40,160 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 69 [2023-02-17 07:31:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:31:40,161 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2023-02-17 07:31:40,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 07:31:40,161 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2023-02-17 07:31:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-17 07:31:40,162 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:40,162 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:31:40,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 07:31:40,369 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,SelfDestructingSolverStorable9 [2023-02-17 07:31:40,370 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:40,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:40,370 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2023-02-17 07:31:40,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:40,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387848457] [2023-02-17 07:31:40,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:40,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:40,378 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:31:40,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766054743] [2023-02-17 07:31:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:40,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:40,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:31:40,395 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) [2023-02-17 07:31:40,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 07:31:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:31:40,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-17 07:31:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:31:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-17 07:31:40,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:31:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2023-02-17 07:31:40,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:31:40,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387848457] [2023-02-17 07:31:40,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:31:40,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766054743] [2023-02-17 07:31:40,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766054743] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:31:40,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:31:40,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-02-17 07:31:40,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136341695] [2023-02-17 07:31:40,583 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:31:40,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 07:31:40,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:31:40,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 07:31:40,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-02-17 07:31:40,585 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-17 07:31:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:31:40,829 INFO L93 Difference]: Finished difference Result 263 states and 312 transitions. [2023-02-17 07:31:40,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 07:31:40,830 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 74 [2023-02-17 07:31:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:31:40,831 INFO L225 Difference]: With dead ends: 263 [2023-02-17 07:31:40,831 INFO L226 Difference]: Without dead ends: 218 [2023-02-17 07:31:40,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-02-17 07:31:40,832 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 17 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:31:40,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 267 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:31:40,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-02-17 07:31:40,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 210. [2023-02-17 07:31:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 144 states have (on average 1.1527777777777777) internal successors, (166), 147 states have internal predecessors, (166), 40 states have call successors, (40), 25 states have call predecessors, (40), 25 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2023-02-17 07:31:40,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 245 transitions. [2023-02-17 07:31:40,862 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 245 transitions. Word has length 74 [2023-02-17 07:31:40,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:31:40,862 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 245 transitions. [2023-02-17 07:31:40,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 6 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-17 07:31:40,863 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 245 transitions. [2023-02-17 07:31:40,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-02-17 07:31:40,864 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:40,864 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-02-17 07:31:40,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 07:31:41,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:41,070 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:41,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:41,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2023-02-17 07:31:41,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:41,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962185598] [2023-02-17 07:31:41,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:41,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:41,080 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:31:41,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567107401] [2023-02-17 07:31:41,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:31:41,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:41,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:31:41,099 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) [2023-02-17 07:31:41,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 07:31:41,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:31:41,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:31:41,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-17 07:31:41,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:31:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-17 07:31:41,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:31:45,923 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-17 07:31:45,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:31:45,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962185598] [2023-02-17 07:31:45,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:31:45,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567107401] [2023-02-17 07:31:45,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567107401] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:31:45,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:31:45,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-02-17 07:31:45,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726624816] [2023-02-17 07:31:45,924 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:31:45,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 07:31:45,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:31:45,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 07:31:45,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-02-17 07:31:45,925 INFO L87 Difference]: Start difference. First operand 210 states and 245 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-17 07:31:50,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:31:59,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:31:59,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:31:59,636 INFO L93 Difference]: Finished difference Result 309 states and 397 transitions. [2023-02-17 07:31:59,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 07:31:59,637 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 90 [2023-02-17 07:31:59,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:31:59,638 INFO L225 Difference]: With dead ends: 309 [2023-02-17 07:31:59,638 INFO L226 Difference]: Without dead ends: 259 [2023-02-17 07:31:59,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=151, Invalid=551, Unknown=0, NotChecked=0, Total=702 [2023-02-17 07:31:59,639 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 118 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 153 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2023-02-17 07:31:59,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 331 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1133 Invalid, 2 Unknown, 0 Unchecked, 10.3s Time] [2023-02-17 07:31:59,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-17 07:31:59,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 246. [2023-02-17 07:31:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 166 states have (on average 1.2048192771084338) internal successors, (200), 174 states have internal predecessors, (200), 53 states have call successors, (53), 26 states have call predecessors, (53), 26 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2023-02-17 07:31:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 305 transitions. [2023-02-17 07:31:59,752 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 305 transitions. Word has length 90 [2023-02-17 07:31:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:31:59,753 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 305 transitions. [2023-02-17 07:31:59,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2023-02-17 07:31:59,753 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 305 transitions. [2023-02-17 07:31:59,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-17 07:31:59,754 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:31:59,754 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:31:59,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-17 07:31:59,959 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,SelfDestructingSolverStorable11 [2023-02-17 07:31:59,959 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:31:59,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:31:59,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2023-02-17 07:31:59,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:31:59,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910044001] [2023-02-17 07:31:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:59,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:31:59,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:31:59,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653941040] [2023-02-17 07:31:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:31:59,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:31:59,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:31:59,972 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) [2023-02-17 07:31:59,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 07:32:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:32:00,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-17 07:32:00,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:32:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2023-02-17 07:32:00,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:32:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2023-02-17 07:32:00,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:32:00,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910044001] [2023-02-17 07:32:00,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:32:00,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653941040] [2023-02-17 07:32:00,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653941040] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:32:00,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:32:00,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-02-17 07:32:00,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974587358] [2023-02-17 07:32:00,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:32:00,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 07:32:00,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:32:00,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 07:32:00,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-17 07:32:00,092 INFO L87 Difference]: Start difference. First operand 246 states and 305 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-17 07:32:00,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:32:00,540 INFO L93 Difference]: Finished difference Result 703 states and 939 transitions. [2023-02-17 07:32:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-17 07:32:00,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 96 [2023-02-17 07:32:00,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:32:00,544 INFO L225 Difference]: With dead ends: 703 [2023-02-17 07:32:00,544 INFO L226 Difference]: Without dead ends: 628 [2023-02-17 07:32:00,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-02-17 07:32:00,545 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 160 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:32:00,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 297 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:32:00,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2023-02-17 07:32:00,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 543. [2023-02-17 07:32:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 360 states have (on average 1.2805555555555554) internal successors, (461), 386 states have internal predecessors, (461), 130 states have call successors, (130), 52 states have call predecessors, (130), 52 states have return successors, (127), 104 states have call predecessors, (127), 127 states have call successors, (127) [2023-02-17 07:32:00,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 718 transitions. [2023-02-17 07:32:00,800 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 718 transitions. Word has length 96 [2023-02-17 07:32:00,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:32:00,801 INFO L495 AbstractCegarLoop]: Abstraction has 543 states and 718 transitions. [2023-02-17 07:32:00,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-17 07:32:00,801 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 718 transitions. [2023-02-17 07:32:00,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-17 07:32:00,802 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:32:00,802 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:32:00,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 07:32:01,002 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,SelfDestructingSolverStorable12 [2023-02-17 07:32:01,003 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:32:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:32:01,003 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2023-02-17 07:32:01,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:32:01,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710029484] [2023-02-17 07:32:01,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:32:01,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:32:01,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:32:01,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953759858] [2023-02-17 07:32:01,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:32:01,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:01,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:32:01,012 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) [2023-02-17 07:32:01,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 07:32:01,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:32:01,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:32:01,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-17 07:32:01,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:32:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-17 07:32:01,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:32:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-02-17 07:32:02,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:32:02,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710029484] [2023-02-17 07:32:02,885 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:32:02,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953759858] [2023-02-17 07:32:02,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953759858] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:32:02,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:32:02,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2023-02-17 07:32:02,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829574243] [2023-02-17 07:32:02,886 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:32:02,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 07:32:02,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:32:02,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 07:32:02,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-02-17 07:32:02,887 INFO L87 Difference]: Start difference. First operand 543 states and 718 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-17 07:32:07,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:32:09,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 07:32:11,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:32:11,885 INFO L93 Difference]: Finished difference Result 674 states and 887 transitions. [2023-02-17 07:32:11,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 07:32:11,886 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 101 [2023-02-17 07:32:11,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:32:11,888 INFO L225 Difference]: With dead ends: 674 [2023-02-17 07:32:11,888 INFO L226 Difference]: Without dead ends: 546 [2023-02-17 07:32:11,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 176 SyntacticMatches, 5 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=242, Invalid=814, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 07:32:11,889 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 76 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 102 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-02-17 07:32:11,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 235 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 875 Invalid, 2 Unknown, 0 Unchecked, 7.5s Time] [2023-02-17 07:32:11,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2023-02-17 07:32:12,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 498. [2023-02-17 07:32:12,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 330 states have (on average 1.2333333333333334) internal successors, (407), 352 states have internal predecessors, (407), 114 states have call successors, (114), 53 states have call predecessors, (114), 53 states have return successors, (111), 92 states have call predecessors, (111), 111 states have call successors, (111) [2023-02-17 07:32:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 632 transitions. [2023-02-17 07:32:12,122 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 632 transitions. Word has length 101 [2023-02-17 07:32:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:32:12,123 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 632 transitions. [2023-02-17 07:32:12,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2023-02-17 07:32:12,123 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 632 transitions. [2023-02-17 07:32:12,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-17 07:32:12,124 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:32:12,124 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:32:12,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 07:32:12,330 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,SelfDestructingSolverStorable13 [2023-02-17 07:32:12,330 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:32:12,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:32:12,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1246855822, now seen corresponding path program 1 times [2023-02-17 07:32:12,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:32:12,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501190638] [2023-02-17 07:32:12,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:32:12,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:32:12,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:32:12,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465768330] [2023-02-17 07:32:12,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:32:12,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:12,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:32:12,345 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) [2023-02-17 07:32:12,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 07:32:12,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:32:12,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 07:32:12,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:32:12,427 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-02-17 07:32:12,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:32:12,491 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-02-17 07:32:12,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:32:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501190638] [2023-02-17 07:32:12,492 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:32:12,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465768330] [2023-02-17 07:32:12,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465768330] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:32:12,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:32:12,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-02-17 07:32:12,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713692939] [2023-02-17 07:32:12,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:32:12,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 07:32:12,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:32:12,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 07:32:12,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-02-17 07:32:12,494 INFO L87 Difference]: Start difference. First operand 498 states and 632 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-17 07:32:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:32:13,187 INFO L93 Difference]: Finished difference Result 986 states and 1288 transitions. [2023-02-17 07:32:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-17 07:32:13,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 104 [2023-02-17 07:32:13,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:32:13,191 INFO L225 Difference]: With dead ends: 986 [2023-02-17 07:32:13,191 INFO L226 Difference]: Without dead ends: 947 [2023-02-17 07:32:13,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2023-02-17 07:32:13,193 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 250 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 07:32:13,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 382 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 07:32:13,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2023-02-17 07:32:13,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 922. [2023-02-17 07:32:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 610 states have (on average 1.1704918032786886) internal successors, (714), 654 states have internal predecessors, (714), 223 states have call successors, (223), 89 states have call predecessors, (223), 88 states have return successors, (215), 178 states have call predecessors, (215), 215 states have call successors, (215) [2023-02-17 07:32:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1152 transitions. [2023-02-17 07:32:13,566 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1152 transitions. Word has length 104 [2023-02-17 07:32:13,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:32:13,566 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1152 transitions. [2023-02-17 07:32:13,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2023-02-17 07:32:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1152 transitions. [2023-02-17 07:32:13,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-17 07:32:13,569 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:32:13,570 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:32:13,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-17 07:32:13,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 07:32:13,775 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:32:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:32:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1040094269, now seen corresponding path program 2 times [2023-02-17 07:32:13,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:32:13,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756532926] [2023-02-17 07:32:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:32:13,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:32:13,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:32:13,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312692738] [2023-02-17 07:32:13,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:32:13,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:13,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:32:13,805 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:32:13,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 07:32:13,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:32:13,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:32:13,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-17 07:32:13,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:32:13,921 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-17 07:32:13,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:32:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 34 proven. 77 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2023-02-17 07:32:14,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:32:14,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756532926] [2023-02-17 07:32:14,319 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:32:14,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312692738] [2023-02-17 07:32:14,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312692738] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:32:14,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:32:14,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2023-02-17 07:32:14,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535372176] [2023-02-17 07:32:14,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:32:14,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 07:32:14,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:32:14,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 07:32:14,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-02-17 07:32:14,322 INFO L87 Difference]: Start difference. First operand 922 states and 1152 transitions. Second operand has 18 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-17 07:32:15,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:32:15,571 INFO L93 Difference]: Finished difference Result 1139 states and 1407 transitions. [2023-02-17 07:32:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 07:32:15,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 106 [2023-02-17 07:32:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:32:15,592 INFO L225 Difference]: With dead ends: 1139 [2023-02-17 07:32:15,592 INFO L226 Difference]: Without dead ends: 834 [2023-02-17 07:32:15,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 191 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-02-17 07:32:15,593 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 30 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-17 07:32:15,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 267 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-17 07:32:15,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2023-02-17 07:32:15,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 826. [2023-02-17 07:32:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 551 states have (on average 1.1506352087114338) internal successors, (634), 589 states have internal predecessors, (634), 197 states have call successors, (197), 77 states have call predecessors, (197), 77 states have return successors, (189), 159 states have call predecessors, (189), 189 states have call successors, (189) [2023-02-17 07:32:15,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1020 transitions. [2023-02-17 07:32:15,905 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1020 transitions. Word has length 106 [2023-02-17 07:32:15,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:32:15,906 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1020 transitions. [2023-02-17 07:32:15,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.5) internal successors, (56), 17 states have internal predecessors, (56), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-17 07:32:15,906 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1020 transitions. [2023-02-17 07:32:15,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-02-17 07:32:15,907 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:32:15,908 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-02-17 07:32:15,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-17 07:32:16,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:16,113 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:32:16,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:32:16,113 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2023-02-17 07:32:16,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:32:16,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246278964] [2023-02-17 07:32:16,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:32:16,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:32:16,119 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:32:16,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239522612] [2023-02-17 07:32:16,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:32:16,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:16,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:32:16,125 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:32:16,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 07:32:16,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 07:32:16,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:32:16,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-17 07:32:16,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:32:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 159 proven. 47 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2023-02-17 07:32:16,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:32:18,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:32:18,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246278964] [2023-02-17 07:32:18,042 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:32:18,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239522612] [2023-02-17 07:32:18,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239522612] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 07:32:18,042 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 07:32:18,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-17 07:32:18,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670531088] [2023-02-17 07:32:18,042 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 07:32:18,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-17 07:32:18,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:32:18,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-17 07:32:18,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-02-17 07:32:18,043 INFO L87 Difference]: Start difference. First operand 826 states and 1020 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-17 07:32:18,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:32:18,465 INFO L93 Difference]: Finished difference Result 857 states and 1050 transitions. [2023-02-17 07:32:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 07:32:18,466 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 122 [2023-02-17 07:32:18,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:32:18,469 INFO L225 Difference]: With dead ends: 857 [2023-02-17 07:32:18,469 INFO L226 Difference]: Without dead ends: 843 [2023-02-17 07:32:18,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-02-17 07:32:18,470 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:32:18,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 59 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:32:18,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2023-02-17 07:32:18,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 827. [2023-02-17 07:32:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 827 states, 556 states have (on average 1.1384892086330936) internal successors, (633), 588 states have internal predecessors, (633), 192 states have call successors, (192), 79 states have call predecessors, (192), 78 states have return successors, (189), 159 states have call predecessors, (189), 189 states have call successors, (189) [2023-02-17 07:32:18,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 827 states to 827 states and 1014 transitions. [2023-02-17 07:32:18,784 INFO L78 Accepts]: Start accepts. Automaton has 827 states and 1014 transitions. Word has length 122 [2023-02-17 07:32:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:32:18,785 INFO L495 AbstractCegarLoop]: Abstraction has 827 states and 1014 transitions. [2023-02-17 07:32:18,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 3 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2023-02-17 07:32:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 827 states and 1014 transitions. [2023-02-17 07:32:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-17 07:32:18,786 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:32:18,786 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:32:18,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-17 07:32:18,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 07:32:18,992 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:32:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:32:18,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1989463840, now seen corresponding path program 3 times [2023-02-17 07:32:18,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:32:18,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652475658] [2023-02-17 07:32:18,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:32:18,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:32:18,999 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:32:18,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1204674506] [2023-02-17 07:32:19,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:32:19,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:19,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:32:19,010 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:32:19,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 07:32:19,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 07:32:19,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:32:19,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-17 07:32:19,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:32:19,096 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2023-02-17 07:32:19,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:32:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-17 07:32:19,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:32:19,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652475658] [2023-02-17 07:32:19,160 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:32:19,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204674506] [2023-02-17 07:32:19,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204674506] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:32:19,160 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:32:19,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2023-02-17 07:32:19,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355161169] [2023-02-17 07:32:19,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:32:19,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 07:32:19,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:32:19,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 07:32:19,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2023-02-17 07:32:19,162 INFO L87 Difference]: Start difference. First operand 827 states and 1014 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-17 07:32:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:32:19,673 INFO L93 Difference]: Finished difference Result 834 states and 1020 transitions. [2023-02-17 07:32:19,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 07:32:19,674 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 133 [2023-02-17 07:32:19,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:32:19,678 INFO L225 Difference]: With dead ends: 834 [2023-02-17 07:32:19,678 INFO L226 Difference]: Without dead ends: 824 [2023-02-17 07:32:19,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 250 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-02-17 07:32:19,679 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 07:32:19,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 86 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 07:32:19,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2023-02-17 07:32:19,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 525. [2023-02-17 07:32:19,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 352 states have (on average 1.1107954545454546) internal successors, (391), 371 states have internal predecessors, (391), 109 states have call successors, (109), 63 states have call predecessors, (109), 63 states have return successors, (108), 90 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-17 07:32:19,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 608 transitions. [2023-02-17 07:32:19,968 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 608 transitions. Word has length 133 [2023-02-17 07:32:19,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:32:19,970 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 608 transitions. [2023-02-17 07:32:19,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2023-02-17 07:32:19,971 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 608 transitions. [2023-02-17 07:32:19,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2023-02-17 07:32:19,973 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:32:19,973 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:32:19,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 07:32:20,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-17 07:32:20,178 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:32:20,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:32:20,179 INFO L85 PathProgramCache]: Analyzing trace with hash 888958317, now seen corresponding path program 1 times [2023-02-17 07:32:20,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:32:20,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132325542] [2023-02-17 07:32:20,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:32:20,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:32:20,188 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:32:20,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206707160] [2023-02-17 07:32:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:32:20,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:20,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:32:20,190 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:32:20,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 07:32:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 07:32:20,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-17 07:32:20,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:32:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 2222 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-17 07:32:20,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:32:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2374 backedges. 64 proven. 326 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2023-02-17 07:32:20,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:32:20,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132325542] [2023-02-17 07:32:20,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:32:20,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206707160] [2023-02-17 07:32:20,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206707160] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:32:20,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:32:20,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2023-02-17 07:32:20,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089769139] [2023-02-17 07:32:20,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:32:20,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-17 07:32:20,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:32:20,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-17 07:32:20,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2023-02-17 07:32:20,633 INFO L87 Difference]: Start difference. First operand 525 states and 608 transitions. Second operand has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 29 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 28 states have call predecessors, (64), 28 states have call successors, (64) [2023-02-17 07:32:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:32:22,160 INFO L93 Difference]: Finished difference Result 1259 states and 1550 transitions. [2023-02-17 07:32:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-17 07:32:22,161 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 29 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 28 states have call predecessors, (64), 28 states have call successors, (64) Word has length 220 [2023-02-17 07:32:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:32:22,165 INFO L225 Difference]: With dead ends: 1259 [2023-02-17 07:32:22,165 INFO L226 Difference]: Without dead ends: 1246 [2023-02-17 07:32:22,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1212, Invalid=2210, Unknown=0, NotChecked=0, Total=3422 [2023-02-17 07:32:22,167 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 578 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 649 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 07:32:22,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 649 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 07:32:22,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2023-02-17 07:32:22,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1245. [2023-02-17 07:32:22,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 832 states have (on average 1.1237980769230769) internal successors, (935), 883 states have internal predecessors, (935), 269 states have call successors, (269), 143 states have call predecessors, (269), 143 states have return successors, (268), 218 states have call predecessors, (268), 268 states have call successors, (268) [2023-02-17 07:32:22,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1472 transitions. [2023-02-17 07:32:22,958 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1472 transitions. Word has length 220 [2023-02-17 07:32:22,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:32:22,958 INFO L495 AbstractCegarLoop]: Abstraction has 1245 states and 1472 transitions. [2023-02-17 07:32:22,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.705882352941177) internal successors, (160), 34 states have internal predecessors, (160), 29 states have call successors, (65), 16 states have call predecessors, (65), 15 states have return successors, (64), 28 states have call predecessors, (64), 28 states have call successors, (64) [2023-02-17 07:32:22,959 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1472 transitions. [2023-02-17 07:32:22,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2023-02-17 07:32:22,964 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:32:22,964 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 27, 26, 26, 26, 26, 26, 26, 26, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:32:22,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 07:32:23,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:23,170 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:32:23,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:32:23,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1525085741, now seen corresponding path program 2 times [2023-02-17 07:32:23,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:32:23,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569389006] [2023-02-17 07:32:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:32:23,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:32:23,182 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:32:23,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811713659] [2023-02-17 07:32:23,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 07:32:23,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:23,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:32:23,184 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:32:23,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 07:32:23,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 07:32:23,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:32:23,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-17 07:32:23,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:32:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 9950 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2023-02-17 07:32:23,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:32:24,475 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 2038 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2023-02-17 07:32:24,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:32:24,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569389006] [2023-02-17 07:32:24,476 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:32:24,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811713659] [2023-02-17 07:32:24,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811713659] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:32:24,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:32:24,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 54 [2023-02-17 07:32:24,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19335126] [2023-02-17 07:32:24,478 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:32:24,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-17 07:32:24,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:32:24,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-17 07:32:24,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2023-02-17 07:32:24,483 INFO L87 Difference]: Start difference. First operand 1245 states and 1472 transitions. Second operand has 54 states, 54 states have (on average 5.703703703703703) internal successors, (308), 54 states have internal predecessors, (308), 50 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 49 states have call predecessors, (128), 49 states have call successors, (128) [2023-02-17 07:32:27,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:32:27,807 INFO L93 Difference]: Finished difference Result 2159 states and 2646 transitions. [2023-02-17 07:32:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-17 07:32:27,807 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.703703703703703) internal successors, (308), 54 states have internal predecessors, (308), 50 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 49 states have call predecessors, (128), 49 states have call successors, (128) Word has length 444 [2023-02-17 07:32:27,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:32:27,813 INFO L225 Difference]: With dead ends: 2159 [2023-02-17 07:32:27,814 INFO L226 Difference]: Without dead ends: 2146 [2023-02-17 07:32:27,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 822 SyntacticMatches, 12 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3518, Invalid=6184, Unknown=0, NotChecked=0, Total=9702 [2023-02-17 07:32:27,816 INFO L413 NwaCegarLoop]: 265 mSDtfsCounter, 1129 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1479 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1129 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 1479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-17 07:32:27,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1129 Valid, 1078 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 1479 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-17 07:32:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2146 states. [2023-02-17 07:32:29,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2146 to 2145. [2023-02-17 07:32:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2145 states, 1432 states have (on average 1.1277932960893855) internal successors, (1615), 1523 states have internal predecessors, (1615), 469 states have call successors, (469), 243 states have call predecessors, (469), 243 states have return successors, (468), 378 states have call predecessors, (468), 468 states have call successors, (468) [2023-02-17 07:32:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2145 states to 2145 states and 2552 transitions. [2023-02-17 07:32:29,082 INFO L78 Accepts]: Start accepts. Automaton has 2145 states and 2552 transitions. Word has length 444 [2023-02-17 07:32:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:32:29,082 INFO L495 AbstractCegarLoop]: Abstraction has 2145 states and 2552 transitions. [2023-02-17 07:32:29,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.703703703703703) internal successors, (308), 54 states have internal predecessors, (308), 50 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 49 states have call predecessors, (128), 49 states have call successors, (128) [2023-02-17 07:32:29,083 INFO L276 IsEmpty]: Start isEmpty. Operand 2145 states and 2552 transitions. [2023-02-17 07:32:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 725 [2023-02-17 07:32:29,096 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:32:29,096 INFO L195 NwaCegarLoop]: trace histogram [105, 104, 104, 47, 46, 46, 46, 46, 46, 46, 46, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:32:29,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 07:32:29,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:29,303 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:32:29,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:32:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash -554493667, now seen corresponding path program 3 times [2023-02-17 07:32:29,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:32:29,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475655116] [2023-02-17 07:32:29,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:32:29,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:32:29,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:32:29,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [585518158] [2023-02-17 07:32:29,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 07:32:29,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:29,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:32:29,323 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:32:29,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 07:32:40,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2023-02-17 07:32:40,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 07:32:40,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-17 07:32:41,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 07:32:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 27970 backedges. 7737 proven. 69 refuted. 0 times theorem prover too weak. 20164 trivial. 0 not checked. [2023-02-17 07:32:41,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 07:32:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 27970 backedges. 1185 proven. 69 refuted. 0 times theorem prover too weak. 26716 trivial. 0 not checked. [2023-02-17 07:32:41,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 07:32:41,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475655116] [2023-02-17 07:32:41,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 07:32:41,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585518158] [2023-02-17 07:32:41,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585518158] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 07:32:41,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 07:32:41,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 12 [2023-02-17 07:32:41,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343688125] [2023-02-17 07:32:41,604 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 07:32:41,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 07:32:41,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 07:32:41,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 07:32:41,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-17 07:32:41,606 INFO L87 Difference]: Start difference. First operand 2145 states and 2552 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 11 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2023-02-17 07:32:43,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 07:32:43,194 INFO L93 Difference]: Finished difference Result 3159 states and 3793 transitions. [2023-02-17 07:32:43,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 07:32:43,195 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 11 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) Word has length 724 [2023-02-17 07:32:43,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 07:32:43,200 INFO L225 Difference]: With dead ends: 3159 [2023-02-17 07:32:43,200 INFO L226 Difference]: Without dead ends: 2118 [2023-02-17 07:32:43,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1446 GetRequests, 1432 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-17 07:32:43,202 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 13 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 07:32:43,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 357 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 07:32:43,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2118 states. [2023-02-17 07:32:44,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2118 to 2118. [2023-02-17 07:32:44,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2118 states, 1414 states have (on average 1.1272984441301273) internal successors, (1594), 1503 states have internal predecessors, (1594), 462 states have call successors, (462), 241 states have call predecessors, (462), 241 states have return successors, (461), 373 states have call predecessors, (461), 461 states have call successors, (461) [2023-02-17 07:32:44,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2118 states to 2118 states and 2517 transitions. [2023-02-17 07:32:44,454 INFO L78 Accepts]: Start accepts. Automaton has 2118 states and 2517 transitions. Word has length 724 [2023-02-17 07:32:44,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 07:32:44,455 INFO L495 AbstractCegarLoop]: Abstraction has 2118 states and 2517 transitions. [2023-02-17 07:32:44,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 11 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (42), 11 states have call predecessors, (42), 11 states have call successors, (42) [2023-02-17 07:32:44,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2118 states and 2517 transitions. [2023-02-17 07:32:44,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 729 [2023-02-17 07:32:44,469 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 07:32:44,469 INFO L195 NwaCegarLoop]: trace histogram [106, 105, 105, 46, 45, 45, 45, 45, 45, 45, 45, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 07:32:44,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-17 07:32:44,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:44,688 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 07:32:44,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 07:32:44,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1342293370, now seen corresponding path program 4 times [2023-02-17 07:32:44,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 07:32:44,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424659053] [2023-02-17 07:32:44,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 07:32:44,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 07:32:44,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 07:32:44,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1926433159] [2023-02-17 07:32:44,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 07:32:44,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 07:32:44,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 07:32:44,727 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 07:32:44,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process